---
_id: '58379'
abstract:
- lang: eng
text: Injection molding plays a pivotal role in modern manufacturing, enabling the
mass production of complex components with high precision. However, traditional
tooling methods often face challenges related to thermal management, design constraints,
and material efficiency. This study examines the use of additive manufacturing
(AM) in the development and optimization of injection molding tools to overcome
these limitations. A novel prototype was fabricated using AM techniques, incorporating
integrated cooling channels and optimized lattice structures to enhance thermal
performance and simplify the manufacturing process. Experimental validation demonstrated
the prototype’s effective integration into a vacuum-assisted resin transfer molding
(VA-LRTM) system without requiring modifications to existing tooling setups. The
results showed significant improvements in temperature regulation, reduced cycle
times, and consistent mechanical properties of the molded components compared
to conventional approaches. By reducing the number of tool components and eliminating
the need for support structures during manufacturing, AM also minimized material
waste and post-processing requirements. This research highlights the transformative
potential of additive manufacturing in injection molding tool design, offering
increased flexibility, cost efficiency, and enhanced functionality to meet the
evolving demands of modern industrial applications.
article_number: '571'
article_type: original
author:
- first_name: Deviprasad
full_name: Chalicheemalapalli Jayasankar, Deviprasad
id: '49504'
last_name: Chalicheemalapalli Jayasankar
orcid: https://orcid.org/ 0000-0002-3446-2444
- first_name: Thomas
full_name: Tröster, Thomas
id: '553'
last_name: Tröster
- first_name: Thorsten
full_name: Marten, Thorsten
id: '338'
last_name: Marten
orcid: 0009-0001-6433-7839
citation:
ama: 'Chalicheemalapalli Jayasankar D, Tröster T, Marten T. Optimizing Injection
Molding Tool Design with Additive Manufacturing: A Focus on Thermal Performance
and Process Efficiency. Materials. 2025;18(3). doi:10.3390/ma18030571'
apa: 'Chalicheemalapalli Jayasankar, D., Tröster, T., & Marten, T. (2025). Optimizing
Injection Molding Tool Design with Additive Manufacturing: A Focus on Thermal
Performance and Process Efficiency. Materials, 18(3), Article 571.
https://doi.org/10.3390/ma18030571'
bibtex: '@article{Chalicheemalapalli Jayasankar_Tröster_Marten_2025, title={Optimizing
Injection Molding Tool Design with Additive Manufacturing: A Focus on Thermal
Performance and Process Efficiency}, volume={18}, DOI={10.3390/ma18030571},
number={3571}, journal={Materials}, publisher={MDPI AG}, author={Chalicheemalapalli
Jayasankar, Deviprasad and Tröster, Thomas and Marten, Thorsten}, year={2025}
}'
chicago: 'Chalicheemalapalli Jayasankar, Deviprasad, Thomas Tröster, and Thorsten
Marten. “Optimizing Injection Molding Tool Design with Additive Manufacturing:
A Focus on Thermal Performance and Process Efficiency.” Materials 18, no.
3 (2025). https://doi.org/10.3390/ma18030571.'
ieee: 'D. Chalicheemalapalli Jayasankar, T. Tröster, and T. Marten, “Optimizing
Injection Molding Tool Design with Additive Manufacturing: A Focus on Thermal
Performance and Process Efficiency,” Materials, vol. 18, no. 3, Art. no.
571, 2025, doi: 10.3390/ma18030571.'
mla: 'Chalicheemalapalli Jayasankar, Deviprasad, et al. “Optimizing Injection Molding
Tool Design with Additive Manufacturing: A Focus on Thermal Performance and Process
Efficiency.” Materials, vol. 18, no. 3, 571, MDPI AG, 2025, doi:10.3390/ma18030571.'
short: D. Chalicheemalapalli Jayasankar, T. Tröster, T. Marten, Materials 18 (2025).
date_created: 2025-01-28T07:46:00Z
date_updated: 2026-03-20T08:46:36Z
department:
- _id: '321'
- _id: '149'
- _id: '9'
doi: 10.3390/ma18030571
intvolume: ' 18'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/1996-1944/18/3/571
oa: '1'
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: 'Optimizing Injection Molding Tool Design with Additive Manufacturing: A Focus
on Thermal Performance and Process Efficiency'
type: journal_article
user_id: '49504'
volume: 18
year: '2025'
...
---
_id: '55762'
abstract:
- lang: eng
text: The corrosion behavior of a hybrid laminate consisting of laser-structured
aluminum EN AW-6082 ∪ carbon fiber-reinforced polymer was investigated. Specimens
were corroded in aqueous NaCl electrolyte (0.1 mol/L) over a period of up to 31
days and characterized continuously by means of scanning electron and light microscopy,
supplemented by energy dispersive X-ray spectroscopy. Comparative linear sweep
voltammetry was employed on the first and seventh day of the corrosion experiment.
The influence of different laser morphologies and production process parameters
on corrosion behavior was compared. The corrosion reaction mainly arises from
the aluminum component and shows distinct differences in long-term corrosion morphology
between pure EN AW-6082 and the hybrid laminate. Compared to short-term investigations,
a strong influence of galvanic corrosion on the interface is assumed. No distinct
influences of different laser structuring and process parameters on the corrosion
behavior were detected. Weight measurements suggest a continuous loss of mass
attributed to the detachment of corrosion products.
article_number: '1907'
article_type: original
author:
- first_name: Alexander
full_name: Delp, Alexander
last_name: Delp
- first_name: Shuang
full_name: Wu, Shuang
id: '48039'
last_name: Wu
orcid: 0000-0001-8645-9952
- first_name: Jonathan
full_name: Freund, Jonathan
last_name: Freund
- first_name: Ronja
full_name: Scholz, Ronja
last_name: Scholz
- first_name: Miriam
full_name: Löbbecke, Miriam
last_name: Löbbecke
- first_name: Thomas
full_name: Tröster, Thomas
id: '553'
last_name: Tröster
- first_name: Jan
full_name: Haubrich, Jan
last_name: Haubrich
- first_name: Frank
full_name: Walther, Frank
last_name: Walther
citation:
ama: Delp A, Wu S, Freund J, et al. Characterization of Interfacial Corrosion Behavior
of Hybrid Laminate EN AW-6082 ∪ CFRP. Materials. 2024;17(8). doi:10.3390/ma17081907
apa: Delp, A., Wu, S., Freund, J., Scholz, R., Löbbecke, M., Tröster, T., Haubrich,
J., & Walther, F. (2024). Characterization of Interfacial Corrosion Behavior
of Hybrid Laminate EN AW-6082 ∪ CFRP. Materials, 17(8), Article
1907. https://doi.org/10.3390/ma17081907
bibtex: '@article{Delp_Wu_Freund_Scholz_Löbbecke_Tröster_Haubrich_Walther_2024,
title={Characterization of Interfacial Corrosion Behavior of Hybrid Laminate EN
AW-6082 ∪ CFRP}, volume={17}, DOI={10.3390/ma17081907},
number={81907}, journal={Materials}, publisher={MDPI AG}, author={Delp, Alexander
and Wu, Shuang and Freund, Jonathan and Scholz, Ronja and Löbbecke, Miriam and
Tröster, Thomas and Haubrich, Jan and Walther, Frank}, year={2024} }'
chicago: Delp, Alexander, Shuang Wu, Jonathan Freund, Ronja Scholz, Miriam Löbbecke,
Thomas Tröster, Jan Haubrich, and Frank Walther. “Characterization of Interfacial
Corrosion Behavior of Hybrid Laminate EN AW-6082 ∪ CFRP.” Materials 17,
no. 8 (2024). https://doi.org/10.3390/ma17081907.
ieee: 'A. Delp et al., “Characterization of Interfacial Corrosion Behavior
of Hybrid Laminate EN AW-6082 ∪ CFRP,” Materials, vol. 17, no. 8, Art.
no. 1907, 2024, doi: 10.3390/ma17081907.'
mla: Delp, Alexander, et al. “Characterization of Interfacial Corrosion Behavior
of Hybrid Laminate EN AW-6082 ∪ CFRP.” Materials, vol. 17, no. 8, 1907,
MDPI AG, 2024, doi:10.3390/ma17081907.
short: A. Delp, S. Wu, J. Freund, R. Scholz, M. Löbbecke, T. Tröster, J. Haubrich,
F. Walther, Materials 17 (2024).
date_created: 2024-08-26T10:48:30Z
date_updated: 2025-01-30T12:31:13Z
department:
- _id: '321'
- _id: '149'
- _id: '9'
doi: 10.3390/ma17081907
intvolume: ' 17'
issue: '8'
language:
- iso: eng
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Characterization of Interfacial Corrosion Behavior of Hybrid Laminate EN AW-6082
∪ CFRP
type: journal_article
user_id: '48039'
volume: 17
year: '2024'
...
---
_id: '34225'
abstract:
- lang: eng
text: 'Thermoplastic composites (TPCs) are predestined for use in lightweight structures,
especially for high-volume applications. In many cases, joining is a key factor
for the successful application of TPCs in multi-material systems. Many joining
processes for this material group are based on warm forming the joining zone.
This results in a change of the local material structure characterised by modified
fibre paths, as well as varying fibre contents, which significantly influences
the load-bearing behaviour. During the forming process, many different phenomena
occur simultaneously at different scales. In this paper, the deformation modes
and flow mechanisms of TPCs during forming described in the literature are first
analysed. Based on this, three different joining processes are investigated: embedding
of inserts, moulding of contour joints, and hotclinching. In order to identify
the phenomena occurring in each process and to describe the characteristic resulting
material structure in the joining zones, micrographs as well as computed tomography
(CT) analyses are performed for both individual process stages and final joining
zones.'
article_number: '5454'
author:
- first_name: Juliane
full_name: Troschitz, Juliane
last_name: Troschitz
- first_name: Benjamin
full_name: Gröger, Benjamin
last_name: Gröger
- first_name: Veit
full_name: Würfel, Veit
last_name: Würfel
- first_name: Robert
full_name: Kupfer, Robert
last_name: Kupfer
- first_name: Maik
full_name: Gude, Maik
last_name: Gude
citation:
ama: 'Troschitz J, Gröger B, Würfel V, Kupfer R, Gude M. Joining Processes for Fibre-Reinforced
Thermoplastics: Phenomena and Characterisation. Materials. 2022;15(15).
doi:10.3390/ma15155454'
apa: 'Troschitz, J., Gröger, B., Würfel, V., Kupfer, R., & Gude, M. (2022).
Joining Processes for Fibre-Reinforced Thermoplastics: Phenomena and Characterisation.
Materials, 15(15), Article 5454. https://doi.org/10.3390/ma15155454'
bibtex: '@article{Troschitz_Gröger_Würfel_Kupfer_Gude_2022, title={Joining Processes
for Fibre-Reinforced Thermoplastics: Phenomena and Characterisation}, volume={15},
DOI={10.3390/ma15155454}, number={155454},
journal={Materials}, publisher={MDPI AG}, author={Troschitz, Juliane and Gröger,
Benjamin and Würfel, Veit and Kupfer, Robert and Gude, Maik}, year={2022} }'
chicago: 'Troschitz, Juliane, Benjamin Gröger, Veit Würfel, Robert Kupfer, and Maik
Gude. “Joining Processes for Fibre-Reinforced Thermoplastics: Phenomena and Characterisation.”
Materials 15, no. 15 (2022). https://doi.org/10.3390/ma15155454.'
ieee: 'J. Troschitz, B. Gröger, V. Würfel, R. Kupfer, and M. Gude, “Joining Processes
for Fibre-Reinforced Thermoplastics: Phenomena and Characterisation,” Materials,
vol. 15, no. 15, Art. no. 5454, 2022, doi: 10.3390/ma15155454.'
mla: 'Troschitz, Juliane, et al. “Joining Processes for Fibre-Reinforced Thermoplastics:
Phenomena and Characterisation.” Materials, vol. 15, no. 15, 5454, MDPI
AG, 2022, doi:10.3390/ma15155454.'
short: J. Troschitz, B. Gröger, V. Würfel, R. Kupfer, M. Gude, Materials 15 (2022).
date_created: 2022-12-05T21:51:47Z
date_updated: 2022-12-05T21:54:09Z
doi: 10.3390/ma15155454
intvolume: ' 15'
issue: '15'
language:
- iso: eng
project:
- _id: '130'
grant_number: '418701707'
name: 'TRR 285: TRR 285'
- _id: '131'
name: 'TRR 285 - A: TRR 285 - Project Area A'
- _id: '137'
name: 'TRR 285 – A03: TRR 285 - Subproject A03'
- _id: '133'
name: 'TRR 285 - C: TRR 285 - Project Area C'
- _id: '148'
name: 'TRR 285 – C04: TRR 285 - Subproject C04'
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
publisher: MDPI AG
status: public
title: 'Joining Processes for Fibre-Reinforced Thermoplastics: Phenomena and Characterisation'
type: journal_article
user_id: '7850'
volume: 15
year: '2022'
...
---
_id: '34254'
abstract:
- lang: eng
text: A virtual test setup for investigating single fibres in a transverse shear
flow based on a parallel-plate rheometer is presented. The investigations are
carried out to verify a numerical representation of the fluid–structure interaction
(FSI), where Arbitrary Lagrangian–Eulerian (ALE) and computational fluid dynamics
(CFD) methods are used and evaluated. Both are suitable to simulate flexible solid
structures in a transverse shear flow. Comparative investigations with different
model setups and increasing complexity are presented. It is shown, that the CFD
method with an interface-based coupling approach is not capable of handling small
fibre diameters in comparison to large fluid domains due to mesh dependencies
at the interface definitions. The ALE method is more suited for this task since
fibres are embedded without any mesh restrictions. Element types beam, solid,
and discrete are considered for fibre modelling. It is shown that the beam formulation
for ALE and 3D solid elements for the CFD method are the preferred options.
article_number: '7241'
author:
- first_name: Benjamin
full_name: Gröger, Benjamin
last_name: Gröger
- first_name: Jingjing
full_name: Wang, Jingjing
last_name: Wang
- first_name: Tim
full_name: Bätzel, Tim
last_name: Bätzel
- first_name: Andreas
full_name: Hornig, Andreas
last_name: Hornig
- first_name: Maik
full_name: Gude, Maik
last_name: Gude
citation:
ama: Gröger B, Wang J, Bätzel T, Hornig A, Gude M. Modelling and Simulation Strategies
for Fluid–Structure-Interactions of Highly Viscous Thermoplastic Melt and Single
Fibres—A Numerical Study. Materials. 2022;15(20). doi:10.3390/ma15207241
apa: Gröger, B., Wang, J., Bätzel, T., Hornig, A., & Gude, M. (2022). Modelling
and Simulation Strategies for Fluid–Structure-Interactions of Highly Viscous Thermoplastic
Melt and Single Fibres—A Numerical Study. Materials, 15(20), Article
7241. https://doi.org/10.3390/ma15207241
bibtex: '@article{Gröger_Wang_Bätzel_Hornig_Gude_2022, title={Modelling and Simulation
Strategies for Fluid–Structure-Interactions of Highly Viscous Thermoplastic Melt
and Single Fibres—A Numerical Study}, volume={15}, DOI={10.3390/ma15207241},
number={207241}, journal={Materials}, publisher={MDPI AG}, author={Gröger, Benjamin
and Wang, Jingjing and Bätzel, Tim and Hornig, Andreas and Gude, Maik}, year={2022}
}'
chicago: Gröger, Benjamin, Jingjing Wang, Tim Bätzel, Andreas Hornig, and Maik Gude.
“Modelling and Simulation Strategies for Fluid–Structure-Interactions of Highly
Viscous Thermoplastic Melt and Single Fibres—A Numerical Study.” Materials
15, no. 20 (2022). https://doi.org/10.3390/ma15207241.
ieee: 'B. Gröger, J. Wang, T. Bätzel, A. Hornig, and M. Gude, “Modelling and Simulation
Strategies for Fluid–Structure-Interactions of Highly Viscous Thermoplastic Melt
and Single Fibres—A Numerical Study,” Materials, vol. 15, no. 20, Art.
no. 7241, 2022, doi: 10.3390/ma15207241.'
mla: Gröger, Benjamin, et al. “Modelling and Simulation Strategies for Fluid–Structure-Interactions
of Highly Viscous Thermoplastic Melt and Single Fibres—A Numerical Study.” Materials,
vol. 15, no. 20, 7241, MDPI AG, 2022, doi:10.3390/ma15207241.
short: B. Gröger, J. Wang, T. Bätzel, A. Hornig, M. Gude, Materials 15 (2022).
date_created: 2022-12-06T20:33:11Z
date_updated: 2023-01-02T11:06:58Z
department:
- _id: '630'
doi: 10.3390/ma15207241
intvolume: ' 15'
issue: '20'
keyword:
- General Materials Science
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/1996-1944/15/20/7241
oa: '1'
project:
- _id: '130'
grant_number: '418701707'
name: 'TRR 285: TRR 285'
- _id: '131'
name: 'TRR 285 - A: TRR 285 - Project Area A'
- _id: '137'
name: 'TRR 285 – A03: TRR 285 - Subproject A03'
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
publisher: MDPI AG
status: public
title: Modelling and Simulation Strategies for Fluid–Structure-Interactions of Highly
Viscous Thermoplastic Melt and Single Fibres—A Numerical Study
type: journal_article
user_id: '14931'
volume: 15
year: '2022'
...
---
_id: '32188'
abstract:
- lang: eng
text: The additive manufacturing (AM) of innovative lattice structures with
unique mechanical properties has received widespread attention due to the capability
of AM processes to fabricate freeform and intricate structures. The most common
way to characterize the additively manufactured lattice structures is via the
uniaxial compression test. However, although there are many applications for which
lattice structures are designed for bending (e.g., sandwich panels cores and some
medical implants), limited attention has been paid toward investigating the flexural
behavior of metallic AM lattice structures with tunable internal architectures.
The purpose of this study was to experimentally investigate the flexural behavior
of AM Ti-6Al-4V lattice structures with graded density and hybrid Poisson’s ratio
(PR). Four configurations of lattice structure beams with positive, negative,
hybrid PR, and a novel hybrid PR with graded density were manufactured via the
laser powder bed fusion (LPBF) AM process and tested under four-point bending.
The manufacturability, microstructure, micro-hardness, and flexural properties
of the lattices were evaluated. During the bending tests, different failure mechanisms
were observed, which were highly dependent on the type of lattice geometry. The
best response in terms of absorbed energy was obtained for the functionally graded
hybrid PR (FGHPR) structure. Both the FGHPR and hybrid PR (HPR) structured showed
a 78.7% and 62.9% increase in the absorbed energy, respectively, compared to the
positive PR (PPR) structure. This highlights the great potential for FGHPR lattices
to be used in protective devices, load-bearing medical implants, and energy-absorbing
applications.
article_number: '4072'
author:
- first_name: Osama
full_name: Abdelaal, Osama
last_name: Abdelaal
- first_name: Florian
full_name: Hengsbach, Florian
last_name: Hengsbach
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
citation:
ama: Abdelaal O, Hengsbach F, Schaper M, Hoyer K-P. LPBF Manufactured Functionally
Graded Lattice Structures Obtained by Graded Density and Hybrid Poisson’s Ratio.
Materials. 2022;15(12). doi:10.3390/ma15124072
apa: Abdelaal, O., Hengsbach, F., Schaper, M., & Hoyer, K.-P. (2022). LPBF Manufactured
Functionally Graded Lattice Structures Obtained by Graded Density and Hybrid Poisson’s
Ratio. Materials, 15(12), Article 4072. https://doi.org/10.3390/ma15124072
bibtex: '@article{Abdelaal_Hengsbach_Schaper_Hoyer_2022, title={LPBF Manufactured
Functionally Graded Lattice Structures Obtained by Graded Density and Hybrid Poisson’s
Ratio}, volume={15}, DOI={10.3390/ma15124072},
number={124072}, journal={Materials}, publisher={MDPI AG}, author={Abdelaal, Osama
and Hengsbach, Florian and Schaper, Mirko and Hoyer, Kay-Peter}, year={2022} }'
chicago: Abdelaal, Osama, Florian Hengsbach, Mirko Schaper, and Kay-Peter Hoyer.
“LPBF Manufactured Functionally Graded Lattice Structures Obtained by Graded Density
and Hybrid Poisson’s Ratio.” Materials 15, no. 12 (2022). https://doi.org/10.3390/ma15124072.
ieee: 'O. Abdelaal, F. Hengsbach, M. Schaper, and K.-P. Hoyer, “LPBF Manufactured
Functionally Graded Lattice Structures Obtained by Graded Density and Hybrid Poisson’s
Ratio,” Materials, vol. 15, no. 12, Art. no. 4072, 2022, doi: 10.3390/ma15124072.'
mla: Abdelaal, Osama, et al. “LPBF Manufactured Functionally Graded Lattice Structures
Obtained by Graded Density and Hybrid Poisson’s Ratio.” Materials, vol.
15, no. 12, 4072, MDPI AG, 2022, doi:10.3390/ma15124072.
short: O. Abdelaal, F. Hengsbach, M. Schaper, K.-P. Hoyer, Materials 15 (2022).
date_created: 2022-06-27T14:50:27Z
date_updated: 2023-04-27T16:34:46Z
department:
- _id: '9'
- _id: '158'
doi: 10.3390/ma15124072
intvolume: ' 15'
issue: '12'
keyword:
- General Materials Science
language:
- iso: eng
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: LPBF Manufactured Functionally Graded Lattice Structures Obtained by Graded
Density and Hybrid Poisson’s Ratio
type: journal_article
user_id: '43720'
volume: 15
year: '2022'
...
---
_id: '41499'
abstract:
- lang: eng
text: The additive manufacturing (AM) of innovative lattice structures with
unique mechanical properties has received widespread attention due to the capability
of AM processes to fabricate freeform and intricate structures. The most common
way to characterize the additively manufactured lattice structures is via the
uniaxial compression test. However, although there are many applications for which
lattice structures are designed for bending (e.g., sandwich panels cores and some
medical implants), limited attention has been paid toward investigating the flexural
behavior of metallic AM lattice structures with tunable internal architectures.
The purpose of this study was to experimentally investigate the flexural behavior
of AM Ti-6Al-4V lattice structures with graded density and hybrid Poisson’s ratio
(PR). Four configurations of lattice structure beams with positive, negative,
hybrid PR, and a novel hybrid PR with graded density were manufactured via the
laser powder bed fusion (LPBF) AM process and tested under four-point bending.
The manufacturability, microstructure, micro-hardness, and flexural properties
of the lattices were evaluated. During the bending tests, different failure mechanisms
were observed, which were highly dependent on the type of lattice geometry. The
best response in terms of absorbed energy was obtained for the functionally graded
hybrid PR (FGHPR) structure. Both the FGHPR and hybrid PR (HPR) structured showed
a 78.7% and 62.9% increase in the absorbed energy, respectively, compared to the
positive PR (PPR) structure. This highlights the great potential for FGHPR lattices
to be used in protective devices, load-bearing medical implants, and energy-absorbing
applications.
article_number: '4072'
author:
- first_name: Osama
full_name: Abdelaal, Osama
last_name: Abdelaal
- first_name: Florian
full_name: Hengsbach, Florian
last_name: Hengsbach
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
citation:
ama: Abdelaal O, Hengsbach F, Schaper M, Hoyer K-P. LPBF Manufactured Functionally
Graded Lattice Structures Obtained by Graded Density and Hybrid Poisson’s Ratio.
Materials. 2022;15(12). doi:10.3390/ma15124072
apa: Abdelaal, O., Hengsbach, F., Schaper, M., & Hoyer, K.-P. (2022). LPBF Manufactured
Functionally Graded Lattice Structures Obtained by Graded Density and Hybrid Poisson’s
Ratio. Materials, 15(12), Article 4072. https://doi.org/10.3390/ma15124072
bibtex: '@article{Abdelaal_Hengsbach_Schaper_Hoyer_2022, title={LPBF Manufactured
Functionally Graded Lattice Structures Obtained by Graded Density and Hybrid Poisson’s
Ratio}, volume={15}, DOI={10.3390/ma15124072},
number={124072}, journal={Materials}, publisher={MDPI AG}, author={Abdelaal, Osama
and Hengsbach, Florian and Schaper, Mirko and Hoyer, Kay-Peter}, year={2022} }'
chicago: Abdelaal, Osama, Florian Hengsbach, Mirko Schaper, and Kay-Peter Hoyer.
“LPBF Manufactured Functionally Graded Lattice Structures Obtained by Graded Density
and Hybrid Poisson’s Ratio.” Materials 15, no. 12 (2022). https://doi.org/10.3390/ma15124072.
ieee: 'O. Abdelaal, F. Hengsbach, M. Schaper, and K.-P. Hoyer, “LPBF Manufactured
Functionally Graded Lattice Structures Obtained by Graded Density and Hybrid Poisson’s
Ratio,” Materials, vol. 15, no. 12, Art. no. 4072, 2022, doi: 10.3390/ma15124072.'
mla: Abdelaal, Osama, et al. “LPBF Manufactured Functionally Graded Lattice Structures
Obtained by Graded Density and Hybrid Poisson’s Ratio.” Materials, vol.
15, no. 12, 4072, MDPI AG, 2022, doi:10.3390/ma15124072.
short: O. Abdelaal, F. Hengsbach, M. Schaper, K.-P. Hoyer, Materials 15 (2022).
date_created: 2023-02-02T14:28:34Z
date_updated: 2023-04-27T16:46:12Z
department:
- _id: '9'
- _id: '158'
doi: 10.3390/ma15124072
intvolume: ' 15'
issue: '12'
keyword:
- General Materials Science
language:
- iso: eng
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: LPBF Manufactured Functionally Graded Lattice Structures Obtained by Graded
Density and Hybrid Poisson’s Ratio
type: journal_article
user_id: '43720'
volume: 15
year: '2022'
...
---
_id: '41500'
abstract:
- lang: eng
text: Titanium alloys, especially β alloys, are favorable as implant materials
due to their promising combination of low Young’s modulus, high strength, corrosion
resistance, and biocompatibility. In particular, the low Young’s moduli reduce
the risk of stress shielding and implant loosening. The processing of Ti-24Nb-4Zr-8Sn
through laser powder bed fusion is presented. The specimens were heat-treated,
and the microstructure was investigated using X-ray diffraction, scanning electron
microscopy, and transmission electron microscopy. The mechanical properties were
determined by hardness and tensile tests. The microstructures reveal a mainly
β microstructure with α″ formation for high cooling rates and α precipitates after
moderate cooling rates or aging. The as-built and α″ phase containing conditions
exhibit a hardness around 225 HV5, yield strengths (YS) from 340 to 490 MPa, ultimate
tensile strengths (UTS) around 706 MPa, fracture elongations around 20%, and Young’s
moduli about 50 GPa. The α precipitates containing conditions reveal a hardness
around 297 HV5, YS around 812 MPa, UTS from 871 to 931 MPa, fracture elongations
around 12%, and Young’s moduli about 75 GPa. Ti-24Nb-4Zr-8Sn exhibits, depending
on the heat treatment, promising properties regarding the material behavior and
the opportunity to tailor the mechanical performance as a low modulus, high strength
implant material.
article_number: '3774'
author:
- first_name: Maxwell
full_name: Hein, Maxwell
id: '52771'
last_name: Hein
orcid: 0000-0002-3732-2236
- first_name: Nelson Filipe
full_name: Lopes Dias, Nelson Filipe
last_name: Lopes Dias
- first_name: Sudipta
full_name: Pramanik, Sudipta
last_name: Pramanik
- first_name: Dominic
full_name: Stangier, Dominic
last_name: Stangier
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Wolfgang
full_name: Tillmann, Wolfgang
last_name: Tillmann
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
citation:
ama: Hein M, Lopes Dias NF, Pramanik S, et al. Heat Treatments of Metastable β Titanium
Alloy Ti-24Nb-4Zr-8Sn Processed by Laser Powder Bed Fusion. Materials.
2022;15(11). doi:10.3390/ma15113774
apa: Hein, M., Lopes Dias, N. F., Pramanik, S., Stangier, D., Hoyer, K.-P., Tillmann,
W., & Schaper, M. (2022). Heat Treatments of Metastable β Titanium Alloy Ti-24Nb-4Zr-8Sn
Processed by Laser Powder Bed Fusion. Materials, 15(11), Article
3774. https://doi.org/10.3390/ma15113774
bibtex: '@article{Hein_Lopes Dias_Pramanik_Stangier_Hoyer_Tillmann_Schaper_2022,
title={Heat Treatments of Metastable β Titanium Alloy Ti-24Nb-4Zr-8Sn Processed
by Laser Powder Bed Fusion}, volume={15}, DOI={10.3390/ma15113774},
number={113774}, journal={Materials}, publisher={MDPI AG}, author={Hein, Maxwell
and Lopes Dias, Nelson Filipe and Pramanik, Sudipta and Stangier, Dominic and
Hoyer, Kay-Peter and Tillmann, Wolfgang and Schaper, Mirko}, year={2022} }'
chicago: Hein, Maxwell, Nelson Filipe Lopes Dias, Sudipta Pramanik, Dominic Stangier,
Kay-Peter Hoyer, Wolfgang Tillmann, and Mirko Schaper. “Heat Treatments of Metastable
β Titanium Alloy Ti-24Nb-4Zr-8Sn Processed by Laser Powder Bed Fusion.” Materials
15, no. 11 (2022). https://doi.org/10.3390/ma15113774.
ieee: 'M. Hein et al., “Heat Treatments of Metastable β Titanium Alloy Ti-24Nb-4Zr-8Sn
Processed by Laser Powder Bed Fusion,” Materials, vol. 15, no. 11, Art.
no. 3774, 2022, doi: 10.3390/ma15113774.'
mla: Hein, Maxwell, et al. “Heat Treatments of Metastable β Titanium Alloy Ti-24Nb-4Zr-8Sn
Processed by Laser Powder Bed Fusion.” Materials, vol. 15, no. 11, 3774,
MDPI AG, 2022, doi:10.3390/ma15113774.
short: M. Hein, N.F. Lopes Dias, S. Pramanik, D. Stangier, K.-P. Hoyer, W. Tillmann,
M. Schaper, Materials 15 (2022).
date_created: 2023-02-02T14:28:54Z
date_updated: 2023-04-27T16:46:15Z
department:
- _id: '9'
- _id: '158'
doi: 10.3390/ma15113774
intvolume: ' 15'
issue: '11'
keyword:
- General Materials Science
language:
- iso: eng
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Heat Treatments of Metastable β Titanium Alloy Ti-24Nb-4Zr-8Sn Processed by
Laser Powder Bed Fusion
type: journal_article
user_id: '43720'
volume: 15
year: '2022'
...
---
_id: '41488'
abstract:
- lang: eng
text: The additive manufacturing (AM) of innovative lattice structures with
unique mechanical properties has received widespread attention due to the capability
of AM processes to fabricate freeform and intricate structures. The most common
way to characterize the additively manufactured lattice structures is via the
uniaxial compression test. However, although there are many applications for which
lattice structures are designed for bending (e.g., sandwich panels cores and some
medical implants), limited attention has been paid toward investigating the flexural
behavior of metallic AM lattice structures with tunable internal architectures.
The purpose of this study was to experimentally investigate the flexural behavior
of AM Ti-6Al-4V lattice structures with graded density and hybrid Poisson’s ratio
(PR). Four configurations of lattice structure beams with positive, negative,
hybrid PR, and a novel hybrid PR with graded density were manufactured via the
laser powder bed fusion (LPBF) AM process and tested under four-point bending.
The manufacturability, microstructure, micro-hardness, and flexural properties
of the lattices were evaluated. During the bending tests, different failure mechanisms
were observed, which were highly dependent on the type of lattice geometry. The
best response in terms of absorbed energy was obtained for the functionally graded
hybrid PR (FGHPR) structure. Both the FGHPR and hybrid PR (HPR) structured showed
a 78.7% and 62.9% increase in the absorbed energy, respectively, compared to the
positive PR (PPR) structure. This highlights the great potential for FGHPR lattices
to be used in protective devices, load-bearing medical implants, and energy-absorbing
applications.
article_number: '4072'
author:
- first_name: Osama
full_name: Abdelaal, Osama
last_name: Abdelaal
- first_name: Florian
full_name: Hengsbach, Florian
last_name: Hengsbach
- first_name: Mirko
full_name: Schaper, Mirko
last_name: Schaper
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
last_name: Hoyer
citation:
ama: Abdelaal O, Hengsbach F, Schaper M, Hoyer K-P. LPBF Manufactured Functionally
Graded Lattice Structures Obtained by Graded Density and Hybrid Poisson’s Ratio.
Materials. 2022;15(12). doi:10.3390/ma15124072
apa: Abdelaal, O., Hengsbach, F., Schaper, M., & Hoyer, K.-P. (2022). LPBF Manufactured
Functionally Graded Lattice Structures Obtained by Graded Density and Hybrid Poisson’s
Ratio. Materials, 15(12), Article 4072. https://doi.org/10.3390/ma15124072
bibtex: '@article{Abdelaal_Hengsbach_Schaper_Hoyer_2022, title={LPBF Manufactured
Functionally Graded Lattice Structures Obtained by Graded Density and Hybrid Poisson’s
Ratio}, volume={15}, DOI={10.3390/ma15124072},
number={124072}, journal={Materials}, publisher={MDPI AG}, author={Abdelaal, Osama
and Hengsbach, Florian and Schaper, Mirko and Hoyer, Kay-Peter}, year={2022} }'
chicago: Abdelaal, Osama, Florian Hengsbach, Mirko Schaper, and Kay-Peter Hoyer.
“LPBF Manufactured Functionally Graded Lattice Structures Obtained by Graded Density
and Hybrid Poisson’s Ratio.” Materials 15, no. 12 (2022). https://doi.org/10.3390/ma15124072.
ieee: 'O. Abdelaal, F. Hengsbach, M. Schaper, and K.-P. Hoyer, “LPBF Manufactured
Functionally Graded Lattice Structures Obtained by Graded Density and Hybrid Poisson’s
Ratio,” Materials, vol. 15, no. 12, Art. no. 4072, 2022, doi: 10.3390/ma15124072.'
mla: Abdelaal, Osama, et al. “LPBF Manufactured Functionally Graded Lattice Structures
Obtained by Graded Density and Hybrid Poisson’s Ratio.” Materials, vol.
15, no. 12, 4072, MDPI AG, 2022, doi:10.3390/ma15124072.
short: O. Abdelaal, F. Hengsbach, M. Schaper, K.-P. Hoyer, Materials 15 (2022).
date_created: 2023-02-02T14:19:59Z
date_updated: 2023-04-27T16:48:14Z
department:
- _id: '9'
- _id: '158'
doi: 10.3390/ma15124072
intvolume: ' 15'
issue: '12'
keyword:
- General Materials Science
language:
- iso: eng
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
publisher: MDPI AG
status: public
title: LPBF Manufactured Functionally Graded Lattice Structures Obtained by Graded
Density and Hybrid Poisson’s Ratio
type: journal_article
user_id: '48411'
volume: 15
year: '2022'
...
---
_id: '33895'
abstract:
- lang: eng
text: Heat-assisted forming processes are becoming increasingly important
in the manufacturing of sheet metal parts for body-in-white applications. However,
the non-isothermal nature of these processes leads to challenges in evaluating
the forming limits, since established methods such as Forming Limit Curves (FLCs)
only allow the assessment of critical forming strains for steady temperatures.
For this reason, a temperature-dependent extension of the well-established GISSMO
(Generalized Incremental Stress State Dependent Damage Model) fracture indicator
framework is developed by the authors to predict forming failures under non-isothermal
conditions. In this paper, a general approach to combine several isothermal FLCs
within the temperature-extended GISSMO model into a temperature-dependent forming
limit surface is investigated. The general capabilities of the model are tested
in a coupled thermo-mechanical FEA using the example of warm forming of an AA5182-O
sheet metal cross-die cup. The obtained results are then compared with state of
the art of evaluation methods. By taking the strain and temperature path into
account, GISSMO predicts greater drawing depths by up to 20% than established
methods. In this way the forming and so the lightweight potential of sheet metal
parts can by fully exploited. Moreover, the risk and locus of failure can be evaluated
directly on the part geometry by a contour plot. An additional advantage of the
GISSMO model is the applicability for low triaxialities as well as the possibility
to predict the materials behavior beyond necking up to ductile fracture.
article_number: '5106'
author:
- first_name: Alan Adam
full_name: Camberg, Alan Adam
id: '60544'
last_name: Camberg
- first_name: Tobias
full_name: Erhart, Tobias
last_name: Erhart
- first_name: Thomas
full_name: Tröster, Thomas
id: '553'
last_name: Tröster
citation:
ama: Camberg AA, Erhart T, Tröster T. A Generalized Stress State and Temperature
Dependent Damage Indicator Framework for Ductile Failure Prediction in Heat-Assisted
Forming Operations. Materials. 2021;14(17). doi:10.3390/ma14175106
apa: Camberg, A. A., Erhart, T., & Tröster, T. (2021). A Generalized Stress
State and Temperature Dependent Damage Indicator Framework for Ductile Failure
Prediction in Heat-Assisted Forming Operations. Materials, 14(17),
Article 5106. https://doi.org/10.3390/ma14175106
bibtex: '@article{Camberg_Erhart_Tröster_2021, title={A Generalized Stress State
and Temperature Dependent Damage Indicator Framework for Ductile Failure Prediction
in Heat-Assisted Forming Operations}, volume={14}, DOI={10.3390/ma14175106},
number={175106}, journal={Materials}, publisher={MDPI AG}, author={Camberg, Alan
Adam and Erhart, Tobias and Tröster, Thomas}, year={2021} }'
chicago: Camberg, Alan Adam, Tobias Erhart, and Thomas Tröster. “A Generalized Stress
State and Temperature Dependent Damage Indicator Framework for Ductile Failure
Prediction in Heat-Assisted Forming Operations.” Materials 14, no. 17 (2021).
https://doi.org/10.3390/ma14175106.
ieee: 'A. A. Camberg, T. Erhart, and T. Tröster, “A Generalized Stress State and
Temperature Dependent Damage Indicator Framework for Ductile Failure Prediction
in Heat-Assisted Forming Operations,” Materials, vol. 14, no. 17, Art.
no. 5106, 2021, doi: 10.3390/ma14175106.'
mla: Camberg, Alan Adam, et al. “A Generalized Stress State and Temperature Dependent
Damage Indicator Framework for Ductile Failure Prediction in Heat-Assisted Forming
Operations.” Materials, vol. 14, no. 17, 5106, MDPI AG, 2021, doi:10.3390/ma14175106.
short: A.A. Camberg, T. Erhart, T. Tröster, Materials 14 (2021).
date_created: 2022-10-27T10:04:46Z
date_updated: 2022-10-27T10:05:36Z
department:
- _id: '9'
- _id: '149'
- _id: '321'
doi: 10.3390/ma14175106
intvolume: ' 14'
issue: '17'
keyword:
- General Materials Science
language:
- iso: eng
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
publisher: MDPI AG
status: public
title: A Generalized Stress State and Temperature Dependent Damage Indicator Framework
for Ductile Failure Prediction in Heat-Assisted Forming Operations
type: journal_article
user_id: '15952'
volume: 14
year: '2021'
...
---
_id: '24009'
abstract:
- lang: eng
text: Heat-assisted forming processes are becoming increasingly important
in the manufacturing of sheet metal parts for body-in-white applications. However,
the non-isothermal nature of these processes leads to challenges in evaluating
the forming limits, since established methods such as Forming Limit Curves (FLCs)
only allow the assessment of critical forming strains for steady temperatures.
For this reason, a temperature-dependent extension of the well-established GISSMO
(Generalized Incremental Stress State Dependent Damage Model) fracture indicator
framework is developed by the authors to predict forming failures under non-isothermal
conditions. In this paper, a general approach to combine several isothermal FLCs
within the temperature-extended GISSMO model into a temperature-dependent forming
limit surface is investigated. The general capabilities of the model are tested
in a coupled thermo-mechanical FEA using the example of warm forming of an AA5182-O
sheet metal cross-die cup. The obtained results are then compared with state of
the art of evaluation methods. By taking the strain and temperature path into
account, GISSMO predicts greater drawing depths by up to 20% than established
methods. In this way the forming and so the lightweight potential of sheet metal
parts can by fully exploited. Moreover, the risk and locus of failure can be evaluated
directly on the part geometry by a contour plot. An additional advantage of the
GISSMO model is the applicability for low triaxialities as well as the possibility
to predict the materials behavior beyond necking up to ductile fracture.
article_number: '5106'
author:
- first_name: Alan Adam
full_name: Camberg, Alan Adam
id: '60544'
last_name: Camberg
- first_name: Tobias
full_name: Erhart, Tobias
last_name: Erhart
- first_name: Thomas
full_name: Tröster, Thomas
id: '553'
last_name: Tröster
citation:
ama: Camberg AA, Erhart T, Tröster T. A Generalized Stress State and Temperature
Dependent Damage Indicator Framework for Ductile Failure Prediction in Heat-Assisted
Forming Operations. Materials. Published online 2021. doi:10.3390/ma14175106
apa: Camberg, A. A., Erhart, T., & Tröster, T. (2021). A Generalized Stress
State and Temperature Dependent Damage Indicator Framework for Ductile Failure
Prediction in Heat-Assisted Forming Operations. Materials, Article 5106.
https://doi.org/10.3390/ma14175106
bibtex: '@article{Camberg_Erhart_Tröster_2021, title={A Generalized Stress State
and Temperature Dependent Damage Indicator Framework for Ductile Failure Prediction
in Heat-Assisted Forming Operations}, DOI={10.3390/ma14175106},
number={5106}, journal={Materials}, author={Camberg, Alan Adam and Erhart, Tobias
and Tröster, Thomas}, year={2021} }'
chicago: Camberg, Alan Adam, Tobias Erhart, and Thomas Tröster. “A Generalized Stress
State and Temperature Dependent Damage Indicator Framework for Ductile Failure
Prediction in Heat-Assisted Forming Operations.” Materials, 2021. https://doi.org/10.3390/ma14175106.
ieee: 'A. A. Camberg, T. Erhart, and T. Tröster, “A Generalized Stress State and
Temperature Dependent Damage Indicator Framework for Ductile Failure Prediction
in Heat-Assisted Forming Operations,” Materials, Art. no. 5106, 2021, doi:
10.3390/ma14175106.'
mla: Camberg, Alan Adam, et al. “A Generalized Stress State and Temperature Dependent
Damage Indicator Framework for Ductile Failure Prediction in Heat-Assisted Forming
Operations.” Materials, 5106, 2021, doi:10.3390/ma14175106.
short: A.A. Camberg, T. Erhart, T. Tröster, Materials (2021).
date_created: 2021-09-09T10:05:11Z
date_updated: 2023-05-24T08:51:02Z
department:
- _id: '9'
- _id: '149'
- _id: '321'
doi: 10.3390/ma14175106
language:
- iso: eng
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
status: public
title: A Generalized Stress State and Temperature Dependent Damage Indicator Framework
for Ductile Failure Prediction in Heat-Assisted Forming Operations
type: journal_article
user_id: '15952'
year: '2021'
...
---
_id: '41506'
abstract:
- lang: eng
text: Processing aluminum alloys employing powder bed fusion of metals (PBF-LB/M)
is becoming more attractive for the industry, especially if lightweight applications
are needed. Unfortunately, high-strength aluminum alloys such as AA7075 are prone
to hot cracking during PBF-LB/M, as well as welding. Both a large solidification
range promoted by the alloying elements zinc and copper and a high thermal gradient
accompanied with the manufacturing process conditions lead to or favor hot cracking.
In the present study, a simple method for modifying the powder surface with titanium
carbide nanoparticles (NPs) as a nucleating agent is aimed. The effect on the
microstructure with different amounts of the nucleating agent is shown. For the
aluminum alloy 7075 with 2.5 ma% titanium carbide nanoparticles, manufactured
via PBF-LB/M, crack-free samples with a refined microstructure having no discernible
melt pool boundaries and columnar grains are observed. After using a two-step
ageing heat treatment, ultimate tensile strengths up to 465 MPa and an 8.9% elongation
at break are achieved. Furthermore, it is demonstrated that not all nanoparticles
used remain in the melt pool during PBF-LB/M.
article_number: '7190'
author:
- first_name: Steffen
full_name: Heiland, Steffen
id: '77250'
last_name: Heiland
- first_name: Benjamin
full_name: Milkereit, Benjamin
last_name: Milkereit
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Evgeny
full_name: Zhuravlev, Evgeny
last_name: Zhuravlev
- first_name: Olaf
full_name: Kessler, Olaf
last_name: Kessler
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
citation:
ama: Heiland S, Milkereit B, Hoyer K-P, Zhuravlev E, Kessler O, Schaper M. Requirements
for Processing High-Strength AlZnMgCu Alloys with PBF-LB/M to Achieve Crack-Free
and Dense Parts. Materials. 2021;14(23). doi:10.3390/ma14237190
apa: Heiland, S., Milkereit, B., Hoyer, K.-P., Zhuravlev, E., Kessler, O., &
Schaper, M. (2021). Requirements for Processing High-Strength AlZnMgCu Alloys
with PBF-LB/M to Achieve Crack-Free and Dense Parts. Materials, 14(23),
Article 7190. https://doi.org/10.3390/ma14237190
bibtex: '@article{Heiland_Milkereit_Hoyer_Zhuravlev_Kessler_Schaper_2021, title={Requirements
for Processing High-Strength AlZnMgCu Alloys with PBF-LB/M to Achieve Crack-Free
and Dense Parts}, volume={14}, DOI={10.3390/ma14237190},
number={237190}, journal={Materials}, publisher={MDPI AG}, author={Heiland, Steffen
and Milkereit, Benjamin and Hoyer, Kay-Peter and Zhuravlev, Evgeny and Kessler,
Olaf and Schaper, Mirko}, year={2021} }'
chicago: Heiland, Steffen, Benjamin Milkereit, Kay-Peter Hoyer, Evgeny Zhuravlev,
Olaf Kessler, and Mirko Schaper. “Requirements for Processing High-Strength AlZnMgCu
Alloys with PBF-LB/M to Achieve Crack-Free and Dense Parts.” Materials
14, no. 23 (2021). https://doi.org/10.3390/ma14237190.
ieee: 'S. Heiland, B. Milkereit, K.-P. Hoyer, E. Zhuravlev, O. Kessler, and M. Schaper,
“Requirements for Processing High-Strength AlZnMgCu Alloys with PBF-LB/M to Achieve
Crack-Free and Dense Parts,” Materials, vol. 14, no. 23, Art. no. 7190,
2021, doi: 10.3390/ma14237190.'
mla: Heiland, Steffen, et al. “Requirements for Processing High-Strength AlZnMgCu
Alloys with PBF-LB/M to Achieve Crack-Free and Dense Parts.” Materials,
vol. 14, no. 23, 7190, MDPI AG, 2021, doi:10.3390/ma14237190.
short: S. Heiland, B. Milkereit, K.-P. Hoyer, E. Zhuravlev, O. Kessler, M. Schaper,
Materials 14 (2021).
date_created: 2023-02-02T14:31:05Z
date_updated: 2023-06-01T14:34:46Z
department:
- _id: '9'
- _id: '158'
doi: 10.3390/ma14237190
intvolume: ' 14'
issue: '23'
keyword:
- General Materials Science
language:
- iso: eng
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Requirements for Processing High-Strength AlZnMgCu Alloys with PBF-LB/M to
Achieve Crack-Free and Dense Parts
type: journal_article
user_id: '43720'
volume: 14
year: '2021'
...
---
_id: '29815'
abstract:
- lang: eng
text: 'Aluminium steel clad materials have high potential for industrial
applications. Their mechanical properties are governed by an intermetallic layer,
which forms upon heat treatment at the Al-Fe interface. Transmission electron
microscopy was employed to identify the phases present at the interface by selective
area electron diffraction and energy dispersive spectroscopy. Three phases were
identified: orthorhombic Al5Fe2, monoclinic Al13Fe4 and cubic Al19Fe4MnSi2. An
effective interdiffusion coefficient dependent on concentration was determined
according to the Boltzmann–Matano method. The highest value of the interdiffusion
coefficient was reached at the composition of the intermetallic phases. Afterwards,
the process of diffusion considering the evaluated interdiffusion coefficient
was simulated using the finite element method. Results of the simulations revealed
that growth of the intermetallic phases proceeds preferentially in the direction
of aluminium.'
article_number: '7771'
author:
- first_name: Barbora
full_name: Křivská, Barbora
last_name: Křivská
- first_name: Michaela
full_name: Šlapáková, Michaela
last_name: Šlapáková
- first_name: Jozef
full_name: Veselý, Jozef
last_name: Veselý
- first_name: Martin
full_name: Kihoulou, Martin
last_name: Kihoulou
- first_name: Klaudia
full_name: Fekete, Klaudia
last_name: Fekete
- first_name: Peter
full_name: Minárik, Peter
last_name: Minárik
- first_name: Rostislav
full_name: Králík, Rostislav
last_name: Králík
- first_name: Olexandr
full_name: Grydin, Olexandr
id: '43822'
last_name: Grydin
- first_name: Mykhailo
full_name: Stolbchenko, Mykhailo
last_name: Stolbchenko
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
citation:
ama: Křivská B, Šlapáková M, Veselý J, et al. Intermetallic Phases Identification
and Diffusion Simulation in Twin-Roll Cast Al-Fe Clad Sheet. Materials.
2021;14(24). doi:10.3390/ma14247771
apa: Křivská, B., Šlapáková, M., Veselý, J., Kihoulou, M., Fekete, K., Minárik,
P., Králík, R., Grydin, O., Stolbchenko, M., & Schaper, M. (2021). Intermetallic
Phases Identification and Diffusion Simulation in Twin-Roll Cast Al-Fe Clad Sheet.
Materials, 14(24), Article 7771. https://doi.org/10.3390/ma14247771
bibtex: '@article{Křivská_Šlapáková_Veselý_Kihoulou_Fekete_Minárik_Králík_Grydin_Stolbchenko_Schaper_2021,
title={Intermetallic Phases Identification and Diffusion Simulation in Twin-Roll
Cast Al-Fe Clad Sheet}, volume={14}, DOI={10.3390/ma14247771},
number={247771}, journal={Materials}, publisher={MDPI AG}, author={Křivská, Barbora
and Šlapáková, Michaela and Veselý, Jozef and Kihoulou, Martin and Fekete, Klaudia
and Minárik, Peter and Králík, Rostislav and Grydin, Olexandr and Stolbchenko,
Mykhailo and Schaper, Mirko}, year={2021} }'
chicago: Křivská, Barbora, Michaela Šlapáková, Jozef Veselý, Martin Kihoulou, Klaudia
Fekete, Peter Minárik, Rostislav Králík, Olexandr Grydin, Mykhailo Stolbchenko,
and Mirko Schaper. “Intermetallic Phases Identification and Diffusion Simulation
in Twin-Roll Cast Al-Fe Clad Sheet.” Materials 14, no. 24 (2021). https://doi.org/10.3390/ma14247771.
ieee: 'B. Křivská et al., “Intermetallic Phases Identification and Diffusion
Simulation in Twin-Roll Cast Al-Fe Clad Sheet,” Materials, vol. 14, no.
24, Art. no. 7771, 2021, doi: 10.3390/ma14247771.'
mla: Křivská, Barbora, et al. “Intermetallic Phases Identification and Diffusion
Simulation in Twin-Roll Cast Al-Fe Clad Sheet.” Materials, vol. 14, no.
24, 7771, MDPI AG, 2021, doi:10.3390/ma14247771.
short: B. Křivská, M. Šlapáková, J. Veselý, M. Kihoulou, K. Fekete, P. Minárik,
R. Králík, O. Grydin, M. Stolbchenko, M. Schaper, Materials 14 (2021).
date_created: 2022-02-11T17:40:03Z
date_updated: 2023-06-01T14:38:18Z
department:
- _id: '158'
doi: 10.3390/ma14247771
intvolume: ' 14'
issue: '24'
keyword:
- General Materials Science
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/1996-1944/14/24/7771/htm
oa: '1'
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Intermetallic Phases Identification and Diffusion Simulation in Twin-Roll Cast
Al-Fe Clad Sheet
type: journal_article
user_id: '43720'
volume: 14
year: '2021'
...
---
_id: '51200'
abstract:
- lang: eng
text: As lightweight design gains more and more attention, time and cost-efficient
joining methods such as clinching are becoming more popular. A clinch point’s
quality is usually determined by ex situ destructive analyses such as microsectioning.
However, these methods do not yield the detection of phenomena occurring during
loading such as elastic deformations and cracks that close after unloading. Alternatively,
in situ computed tomography (in situ CT) can be used to investigate the loading
process of clinch points. In this paper, a method for in situ CT analysis of a
single-lap shear test with clinched metal sheets is presented at the example of
a clinched joint with two 2 mm thick aluminum sheets. Furthermore, the potential
of this method to validate numerical simulations is shown. Since the sheets’ surfaces
are locally in contact with each other, the interface between both aluminum sheets
and therefore the exact contour of the joining partners is difficult to identify
in CT analyses. To compensate for this, the application of copper varnish between
the sheets is investigated. The best in situ CT results are achieved with both
sheets treated. It showed that with this treatment, in situ CT is suitable to
properly observe the three-dimensional deformation behavior and to identify the
failure modes.
article_number: '1859'
author:
- first_name: Daniel
full_name: Köhler, Daniel
last_name: Köhler
- first_name: Robert
full_name: Kupfer, Robert
last_name: Kupfer
- first_name: Juliane
full_name: Troschitz, Juliane
last_name: Troschitz
- first_name: Maik
full_name: Gude, Maik
last_name: Gude
citation:
ama: Köhler D, Kupfer R, Troschitz J, Gude M. In Situ Computed Tomography—Analysis
of a Single-Lap Shear Test with Clinch Points. Materials. 2021;14(8). doi:10.3390/ma14081859
apa: Köhler, D., Kupfer, R., Troschitz, J., & Gude, M. (2021). In Situ Computed
Tomography—Analysis of a Single-Lap Shear Test with Clinch Points. Materials,
14(8), Article 1859. https://doi.org/10.3390/ma14081859
bibtex: '@article{Köhler_Kupfer_Troschitz_Gude_2021, title={In Situ Computed Tomography—Analysis
of a Single-Lap Shear Test with Clinch Points}, volume={14}, DOI={10.3390/ma14081859},
number={81859}, journal={Materials}, publisher={MDPI AG}, author={Köhler, Daniel
and Kupfer, Robert and Troschitz, Juliane and Gude, Maik}, year={2021} }'
chicago: Köhler, Daniel, Robert Kupfer, Juliane Troschitz, and Maik Gude. “In Situ
Computed Tomography—Analysis of a Single-Lap Shear Test with Clinch Points.” Materials
14, no. 8 (2021). https://doi.org/10.3390/ma14081859.
ieee: 'D. Köhler, R. Kupfer, J. Troschitz, and M. Gude, “In Situ Computed Tomography—Analysis
of a Single-Lap Shear Test with Clinch Points,” Materials, vol. 14, no.
8, Art. no. 1859, 2021, doi: 10.3390/ma14081859.'
mla: Köhler, Daniel, et al. “In Situ Computed Tomography—Analysis of a Single-Lap
Shear Test with Clinch Points.” Materials, vol. 14, no. 8, 1859, MDPI AG,
2021, doi:10.3390/ma14081859.
short: D. Köhler, R. Kupfer, J. Troschitz, M. Gude, Materials 14 (2021).
date_created: 2024-02-06T15:05:43Z
date_updated: 2025-06-02T20:20:32Z
department:
- _id: '157'
- _id: '43'
doi: 10.3390/ma14081859
intvolume: ' 14'
issue: '8'
keyword:
- General Materials Science
language:
- iso: eng
project:
- _id: '130'
grant_number: '418701707'
name: 'TRR 285: TRR 285'
- _id: '133'
name: 'TRR 285 - C: TRR 285 - Project Area C'
- _id: '148'
name: 'TRR 285 – C04: TRR 285 - Subproject C04'
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
publisher: MDPI AG
status: public
title: In Situ Computed Tomography—Analysis of a Single-Lap Shear Test with Clinch
Points
type: journal_article
user_id: '83408'
volume: 14
year: '2021'
...
---
_id: '21948'
abstract:
- lang: eng
text: Since suspensions (e.g., in food, cement, or cosmetics industries)
tend to show wall slip, the application of structured measuring surfaces in rheometers
is widespread. Usually, for parallel-plate geometries, the tip-to-tip distance
is used for calculation of absolute rheological values, which implies that there
is no flow behind this distance. However, several studies show that this is not
true. Therefore, the measuring gap needs to be corrected by adding the effective
gap extension δ to the prescribed gap height H in order to obtain
absolute rheological properties. In this paper, we determine the effective gap
extension δ for different structures and fluids (Newtonian, shear thinning,
and model suspensions that can be adjusted to the behavior of real fluids) and
compare the corrected values to reference data. We observe that for Newtonian
fluids a gap- and material-independent correction function can be derived for
every measuring system, which is also applicable to suspensions, but not to shear
thinning fluids. Since this relation appears to be mainly dependent on the characteristics
of flow behaviour, we show that the calibration of structured measuring systems
is possible with Newtonian fluids and then can be transferred to suspensions up
to a certain particle content.
article_number: '467'
article_type: original
author:
- first_name: Sebastian
full_name: Pawelczyk, Sebastian
id: '38243'
last_name: Pawelczyk
- first_name: Marieluise
full_name: Kniepkamp, Marieluise
last_name: Kniepkamp
- first_name: Steffen
full_name: Jesinghausen, Steffen
id: '3959'
last_name: Jesinghausen
orcid: https://orcid.org/0000-0003-2611-5298
- first_name: Hans-Joachim
full_name: Schmid, Hans-Joachim
id: '464'
last_name: Schmid
citation:
ama: 'Pawelczyk S, Kniepkamp M, Jesinghausen S, Schmid H-J. Absolute Rheological
Measurements of Model Suspensions: Influence and Correction of Wall Slip Prevention
Measures. Materials. Published online 2020. doi:10.3390/ma13020467'
apa: 'Pawelczyk, S., Kniepkamp, M., Jesinghausen, S., & Schmid, H.-J. (2020).
Absolute Rheological Measurements of Model Suspensions: Influence and Correction
of Wall Slip Prevention Measures. Materials, Article 467. https://doi.org/10.3390/ma13020467'
bibtex: '@article{Pawelczyk_Kniepkamp_Jesinghausen_Schmid_2020, title={Absolute
Rheological Measurements of Model Suspensions: Influence and Correction of Wall
Slip Prevention Measures}, DOI={10.3390/ma13020467},
number={467}, journal={Materials}, author={Pawelczyk, Sebastian and Kniepkamp,
Marieluise and Jesinghausen, Steffen and Schmid, Hans-Joachim}, year={2020} }'
chicago: 'Pawelczyk, Sebastian, Marieluise Kniepkamp, Steffen Jesinghausen, and
Hans-Joachim Schmid. “Absolute Rheological Measurements of Model Suspensions:
Influence and Correction of Wall Slip Prevention Measures.” Materials,
2020. https://doi.org/10.3390/ma13020467.'
ieee: 'S. Pawelczyk, M. Kniepkamp, S. Jesinghausen, and H.-J. Schmid, “Absolute
Rheological Measurements of Model Suspensions: Influence and Correction of Wall
Slip Prevention Measures,” Materials, Art. no. 467, 2020, doi: 10.3390/ma13020467.'
mla: 'Pawelczyk, Sebastian, et al. “Absolute Rheological Measurements of Model Suspensions:
Influence and Correction of Wall Slip Prevention Measures.” Materials,
467, 2020, doi:10.3390/ma13020467.'
short: S. Pawelczyk, M. Kniepkamp, S. Jesinghausen, H.-J. Schmid, Materials (2020).
date_created: 2021-05-04T08:48:48Z
date_updated: 2023-01-17T07:45:59Z
department:
- _id: '150'
doi: 10.3390/ma13020467
keyword:
- wall slip prevention
- effective gap height
- parallel-plate system
- structured surfaces
- model suspensions
- cement paste
- fresh concrete
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/1996-1944/13/2/467
oa: '1'
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
quality_controlled: '1'
status: public
title: 'Absolute Rheological Measurements of Model Suspensions: Influence and Correction
of Wall Slip Prevention Measures'
type: journal_article
user_id: '3959'
year: '2020'
...
---
_id: '62777'
abstract:
- lang: eng
text: The simulation of complex engineering components and structures under
loads requires the formulation and adequate calibration of appropriate material
models. This work introduces an optimisation-based scheme for the calibration
of viscoelastic material models that are coupled to gradient-enhanced damage in
a finite strain setting. The parameter identification scheme is applied to a self-diagnostic
poly(dimethylsiloxane) (PDMS) elastomer, where so-called mechanophore units are
incorporated within the polymeric microstructure. The present contribution, however,
focuses on the purely mechanical response of the material, combining experiments
with homogeneous and inhomogeneous states of deformation. In effect, the results
provided lay the groundwork for a future extension of the proposed parameter identification
framework, where additional field-data provided by the self-diagnostic capabilities
can be incorporated into the optimisation scheme.
article_number: '3156'
author:
- first_name: Robin
full_name: Schulte, Robin
last_name: Schulte
- first_name: Richard
full_name: Ostwald, Richard
id: '106876'
last_name: Ostwald
orcid: 0000-0003-2147-8444
- first_name: Andreas
full_name: Menzel, Andreas
last_name: Menzel
citation:
ama: Schulte R, Ostwald R, Menzel A. Gradient-Enhanced Modelling of Damage for Rate-Dependent
Material Behaviour—A Parameter Identification Framework. Materials. 2020;13(14).
doi:10.3390/ma13143156
apa: Schulte, R., Ostwald, R., & Menzel, A. (2020). Gradient-Enhanced Modelling
of Damage for Rate-Dependent Material Behaviour—A Parameter Identification Framework.
Materials, 13(14), Article 3156. https://doi.org/10.3390/ma13143156
bibtex: '@article{Schulte_Ostwald_Menzel_2020, title={Gradient-Enhanced Modelling
of Damage for Rate-Dependent Material Behaviour—A Parameter Identification Framework},
volume={13}, DOI={10.3390/ma13143156},
number={143156}, journal={Materials}, publisher={MDPI AG}, author={Schulte, Robin
and Ostwald, Richard and Menzel, Andreas}, year={2020} }'
chicago: Schulte, Robin, Richard Ostwald, and Andreas Menzel. “Gradient-Enhanced
Modelling of Damage for Rate-Dependent Material Behaviour—A Parameter Identification
Framework.” Materials 13, no. 14 (2020). https://doi.org/10.3390/ma13143156.
ieee: 'R. Schulte, R. Ostwald, and A. Menzel, “Gradient-Enhanced Modelling of Damage
for Rate-Dependent Material Behaviour—A Parameter Identification Framework,” Materials,
vol. 13, no. 14, Art. no. 3156, 2020, doi: 10.3390/ma13143156.'
mla: Schulte, Robin, et al. “Gradient-Enhanced Modelling of Damage for Rate-Dependent
Material Behaviour—A Parameter Identification Framework.” Materials, vol.
13, no. 14, 3156, MDPI AG, 2020, doi:10.3390/ma13143156.
short: R. Schulte, R. Ostwald, A. Menzel, Materials 13 (2020).
date_created: 2025-12-03T13:00:05Z
date_updated: 2025-12-03T13:00:55Z
department:
- _id: '952'
- _id: '321'
doi: 10.3390/ma13143156
intvolume: ' 13'
issue: '14'
language:
- iso: eng
publication: Materials
publication_identifier:
issn:
- 1996-1944
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Gradient-Enhanced Modelling of Damage for Rate-Dependent Material Behaviour—A
Parameter Identification Framework
type: journal_article
user_id: '85414'
volume: 13
year: '2020'
...