---
_id: '49107'
abstract:
- lang: eng
text: The effect of plaque deposition (atherosclerosis) on blood flow behaviour
is investigated via computational fluid dynamics and structural mechanics simulations.
To mitigate the narrowing of coronary artery atherosclerosis (stenosis), the computational
modelling of auxetic and non-auxetic stents was performed in this study to minimise
or even avoid these deposition agents in the future. Computational modelling was
performed in unrestricted (open) conditions and restricted (in an artery) conditions.
Finally, stent designs were produced by additive manufacturing, and mechanical
testing of the stents was undertaken. Auxetic stent 1 and auxetic stent 2 exhibit
very little foreshortening and radial recoil in unrestricted deployment conditions
compared to non-auxetic stent 3. However, stent 2 shows structural instability
(strut failure) during unrestricted deployment conditions. For the restricted
deployment condition, stent 1 shows a higher radial recoil compared to stent 3.
In the tensile test simulations, short elongation for stent 1 due to strut failure
is demonstrated, whereas no structural instability is noticed for stent 2 and
stent 3 until 0.5 (mm/mm) strain. The as-built samples show a significant thickening
of the struts of the stents resulting in short elongations during tensile testing
compared to the simulations (stent 2 and stent 3). A modelling framework for the
stent deployment system that enables the selection of appropriate stent designs
before in vivo testing is required. This leads to the acceleration of the development
process and a reduction in time, resulting in less material wastage. The modelling
framework shall be useful for doctors designing patient-specific stents.
article_number: '1592'
author:
- first_name: Sudipta
full_name: Pramanik, Sudipta
last_name: Pramanik
- first_name: Dennis
full_name: Milaege, Dennis
last_name: Milaege
- first_name: Maxwell
full_name: Hein, Maxwell
id: '52771'
last_name: Hein
orcid: 0000-0002-3732-2236
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
citation:
ama: 'Pramanik S, Milaege D, Hein M, Hoyer K-P, Schaper M. Additive Manufacturing
and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents:
A Combined Experimental and Computational Modelling Approach. Crystals.
2023;13(11). doi:10.3390/cryst13111592'
apa: 'Pramanik, S., Milaege, D., Hein, M., Hoyer, K.-P., & Schaper, M. (2023).
Additive Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn
Biomedical Stents: A Combined Experimental and Computational Modelling Approach.
Crystals, 13(11), Article 1592. https://doi.org/10.3390/cryst13111592'
bibtex: '@article{Pramanik_Milaege_Hein_Hoyer_Schaper_2023, title={Additive Manufacturing
and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents:
A Combined Experimental and Computational Modelling Approach}, volume={13}, DOI={10.3390/cryst13111592}, number={111592},
journal={Crystals}, publisher={MDPI AG}, author={Pramanik, Sudipta and Milaege,
Dennis and Hein, Maxwell and Hoyer, Kay-Peter and Schaper, Mirko}, year={2023}
}'
chicago: 'Pramanik, Sudipta, Dennis Milaege, Maxwell Hein, Kay-Peter Hoyer, and
Mirko Schaper. “Additive Manufacturing and Mechanical Properties of Auxetic and
Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental and Computational
Modelling Approach.” Crystals 13, no. 11 (2023). https://doi.org/10.3390/cryst13111592.'
ieee: 'S. Pramanik, D. Milaege, M. Hein, K.-P. Hoyer, and M. Schaper, “Additive
Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn
Biomedical Stents: A Combined Experimental and Computational Modelling Approach,”
Crystals, vol. 13, no. 11, Art. no. 1592, 2023, doi: 10.3390/cryst13111592.'
mla: 'Pramanik, Sudipta, et al. “Additive Manufacturing and Mechanical Properties
of Auxetic and Non-Auxetic Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental
and Computational Modelling Approach.” Crystals, vol. 13, no. 11, 1592,
MDPI AG, 2023, doi:10.3390/cryst13111592.'
short: S. Pramanik, D. Milaege, M. Hein, K.-P. Hoyer, M. Schaper, Crystals 13 (2023).
date_created: 2023-11-21T15:29:49Z
date_updated: 2023-11-21T15:30:57Z
department:
- _id: '9'
- _id: '158'
doi: 10.3390/cryst13111592
intvolume: ' 13'
issue: '11'
keyword:
- Inorganic Chemistry
- Condensed Matter Physics
- General Materials Science
- General Chemical Engineering
language:
- iso: eng
publication: Crystals
publication_identifier:
issn:
- 2073-4352
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: 'Additive Manufacturing and Mechanical Properties of Auxetic and Non-Auxetic
Ti24Nb4Zr8Sn Biomedical Stents: A Combined Experimental and Computational Modelling
Approach'
type: journal_article
user_id: '48411'
volume: 13
year: '2023'
...
---
_id: '46507'
author:
- first_name: Sudipta
full_name: Pramanik, Sudipta
last_name: Pramanik
- first_name: Dennis
full_name: Milaege, Dennis
last_name: Milaege
- first_name: Maxwell
full_name: Hein, Maxwell
id: '52771'
last_name: Hein
orcid: 0000-0002-3732-2236
- first_name: Anatolii
full_name: Andreiev, Anatolii
id: '50215'
last_name: Andreiev
- 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: Pramanik S, Milaege D, Hein M, Andreiev A, Schaper M, Hoyer K-P. An Experimental
and Computational Modeling Study on Additively Manufactured Micro‐Architectured
Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures. Advanced Engineering Materials.
2023;25(14). doi:10.1002/adem.202201850
apa: Pramanik, S., Milaege, D., Hein, M., Andreiev, A., Schaper, M., & Hoyer,
K.-P. (2023). An Experimental and Computational Modeling Study on Additively Manufactured
Micro‐Architectured Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures. Advanced
Engineering Materials, 25(14). https://doi.org/10.1002/adem.202201850
bibtex: '@article{Pramanik_Milaege_Hein_Andreiev_Schaper_Hoyer_2023, title={An Experimental
and Computational Modeling Study on Additively Manufactured Micro‐Architectured
Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures}, volume={25}, DOI={10.1002/adem.202201850},
number={14}, journal={Advanced Engineering Materials}, publisher={Wiley}, author={Pramanik,
Sudipta and Milaege, Dennis and Hein, Maxwell and Andreiev, Anatolii and Schaper,
Mirko and Hoyer, Kay-Peter}, year={2023} }'
chicago: Pramanik, Sudipta, Dennis Milaege, Maxwell Hein, Anatolii Andreiev, Mirko
Schaper, and Kay-Peter Hoyer. “An Experimental and Computational Modeling Study
on Additively Manufactured Micro‐Architectured Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice
Structures.” Advanced Engineering Materials 25, no. 14 (2023). https://doi.org/10.1002/adem.202201850.
ieee: 'S. Pramanik, D. Milaege, M. Hein, A. Andreiev, M. Schaper, and K.-P. Hoyer,
“An Experimental and Computational Modeling Study on Additively Manufactured Micro‐Architectured
Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures,” Advanced Engineering Materials,
vol. 25, no. 14, 2023, doi: 10.1002/adem.202201850.'
mla: Pramanik, Sudipta, et al. “An Experimental and Computational Modeling Study
on Additively Manufactured Micro‐Architectured Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice
Structures.” Advanced Engineering Materials, vol. 25, no. 14, Wiley, 2023,
doi:10.1002/adem.202201850.
short: S. Pramanik, D. Milaege, M. Hein, A. Andreiev, M. Schaper, K.-P. Hoyer, Advanced
Engineering Materials 25 (2023).
date_created: 2023-08-16T06:27:19Z
date_updated: 2023-08-16T06:29:36Z
department:
- _id: '9'
- _id: '158'
doi: 10.1002/adem.202201850
intvolume: ' 25'
issue: '14'
keyword:
- Condensed Matter Physics
- General Materials Science
language:
- iso: eng
publication: Advanced Engineering Materials
publication_identifier:
issn:
- 1438-1656
- 1527-2648
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: An Experimental and Computational Modeling Study on Additively Manufactured
Micro‐Architectured Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures
type: journal_article
user_id: '48411'
volume: 25
year: '2023'
...
---
_id: '29196'
abstract:
- lang: eng
text: In biomedical engineering, laser powder bed fusion is an advanced manufacturing
technology, which enables, for example, the production of patient-customized implants
with complex geometries. Ti-6Al-7Nb shows promising improvements, especially regarding
biocompatibility, compared with other titanium alloys. The biocompatible features
are investigated employing cytocompatibility and antibacterial examinations on
Al2O3-blasted and untreated surfaces. The mechanical properties of additively
manufactured Ti-6Al-7Nb are evaluated in as-built and heat-treated conditions.
Recrystallization annealing (925 °C for 4 h), β annealing (1050 °C for 2 h), as
well as stress relieving (600 °C for 4 h) are applied. For microstructural investigation,
scanning and transmission electron microscopy are performed. The different microstructures
and the mechanical properties are compared. Mechanical behavior is determined
based on quasi-static tensile tests and strain-controlled low cycle fatigue tests
with total strain amplitudes εA of 0.35%, 0.5%, and 0.8%. The as-built and stress-relieved
conditions meet the mechanical demands for the tensile properties of the international
standard ISO 5832-11. Based on the Coffin–Manson–Basquin relation, fatigue strength
and ductility coefficients, as well as exponents, are determined to examine fatigue
life for the different conditions. The stress-relieved condition exhibits, overall,
the best properties regarding monotonic tensile and cyclic fatigue behavior.
article_number: '122'
article_type: original
author:
- first_name: Maxwell
full_name: Hein, Maxwell
id: '52771'
last_name: Hein
orcid: 0000-0002-3732-2236
- first_name: David
full_name: Kokalj, David
last_name: Kokalj
- first_name: Nelson Filipe
full_name: Lopes Dias, Nelson Filipe
last_name: Lopes Dias
- first_name: Dominic
full_name: Stangier, Dominic
last_name: Stangier
- first_name: Hilke
full_name: Oltmanns, Hilke
last_name: Oltmanns
- first_name: Sudipta
full_name: Pramanik, Sudipta
last_name: Pramanik
- first_name: Manfred
full_name: Kietzmann, Manfred
last_name: Kietzmann
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Jessica
full_name: Meißner, Jessica
last_name: Meißner
- 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, Kokalj D, Lopes Dias NF, et al. Low Cycle Fatigue Performance of Additively
Processed and Heat-Treated Ti-6Al-7Nb Alloy for Biomedical Applications. Metals.
2022;12(1). doi:10.3390/met12010122
apa: Hein, M., Kokalj, D., Lopes Dias, N. F., Stangier, D., Oltmanns, H., Pramanik,
S., Kietzmann, M., Hoyer, K.-P., Meißner, J., Tillmann, W., & Schaper, M.
(2022). Low Cycle Fatigue Performance of Additively Processed and Heat-Treated
Ti-6Al-7Nb Alloy for Biomedical Applications. Metals, 12(1), Article
122. https://doi.org/10.3390/met12010122
bibtex: '@article{Hein_Kokalj_Lopes Dias_Stangier_Oltmanns_Pramanik_Kietzmann_Hoyer_Meißner_Tillmann_et
al._2022, title={Low Cycle Fatigue Performance of Additively Processed and Heat-Treated
Ti-6Al-7Nb Alloy for Biomedical Applications}, volume={12}, DOI={10.3390/met12010122},
number={1122}, journal={Metals}, publisher={MDPI AG}, author={Hein, Maxwell and
Kokalj, David and Lopes Dias, Nelson Filipe and Stangier, Dominic and Oltmanns,
Hilke and Pramanik, Sudipta and Kietzmann, Manfred and Hoyer, Kay-Peter and Meißner,
Jessica and Tillmann, Wolfgang and et al.}, year={2022} }'
chicago: Hein, Maxwell, David Kokalj, Nelson Filipe Lopes Dias, Dominic Stangier,
Hilke Oltmanns, Sudipta Pramanik, Manfred Kietzmann, et al. “Low Cycle Fatigue
Performance of Additively Processed and Heat-Treated Ti-6Al-7Nb Alloy for Biomedical
Applications.” Metals 12, no. 1 (2022). https://doi.org/10.3390/met12010122.
ieee: 'M. Hein et al., “Low Cycle Fatigue Performance of Additively Processed
and Heat-Treated Ti-6Al-7Nb Alloy for Biomedical Applications,” Metals,
vol. 12, no. 1, Art. no. 122, 2022, doi: 10.3390/met12010122.'
mla: Hein, Maxwell, et al. “Low Cycle Fatigue Performance of Additively Processed
and Heat-Treated Ti-6Al-7Nb Alloy for Biomedical Applications.” Metals,
vol. 12, no. 1, 122, MDPI AG, 2022, doi:10.3390/met12010122.
short: M. Hein, D. Kokalj, N.F. Lopes Dias, D. Stangier, H. Oltmanns, S. Pramanik,
M. Kietzmann, K.-P. Hoyer, J. Meißner, W. Tillmann, M. Schaper, Metals 12 (2022).
date_created: 2022-01-10T08:25:58Z
date_updated: 2023-04-27T16:42:19Z
ddc:
- '620'
department:
- _id: '158'
doi: 10.3390/met12010122
file:
- access_level: closed
content_type: application/pdf
creator: maxhein
date_created: 2022-01-10T08:27:11Z
date_updated: 2022-01-10T08:27:11Z
file_id: '29197'
file_name: Hein et al - 2022 - Low Cycle Fatigue Performance of Additively Processed
and Heat-Treated Ti-6Al-7Nb Alloy for Biomedical Applications.pdf
file_size: 6222748
relation: main_file
success: 1
file_date_updated: 2022-01-10T08:27:11Z
has_accepted_license: '1'
intvolume: ' 12'
issue: '1'
keyword:
- General Materials Science
- Metals and Alloys
- laser powder bed fusion
- Ti-6Al-7Nb
- titanium alloy
- biomedical engineering
- low cycle fatigue
- microstructure
- nanostructure
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/2075-4701/12/1/122
oa: '1'
publication: Metals
publication_identifier:
issn:
- 2075-4701
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Low Cycle Fatigue Performance of Additively Processed and Heat-Treated Ti-6Al-7Nb
Alloy for Biomedical Applications
type: journal_article
user_id: '43720'
volume: 12
year: '2022'
...
---
_id: '31076'
article_number: '132384'
author:
- first_name: Wolfgang
full_name: Tillmann, Wolfgang
last_name: Tillmann
- first_name: Nelson Filipe
full_name: Lopes Dias, Nelson Filipe
last_name: Lopes Dias
- first_name: David
full_name: Kokalj, David
last_name: Kokalj
- first_name: Dominic
full_name: Stangier, Dominic
last_name: Stangier
- first_name: Maxwell
full_name: Hein, Maxwell
id: '52771'
last_name: Hein
orcid: 0000-0002-3732-2236
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
- first_name: Daria
full_name: Gödecke, Daria
last_name: Gödecke
- first_name: Hilke
full_name: Oltmanns, Hilke
last_name: Oltmanns
- first_name: Jessica
full_name: Meißner, Jessica
last_name: Meißner
citation:
ama: Tillmann W, Lopes Dias NF, Kokalj D, et al. Tribo-functional PVD thin films
deposited onto additively manufactured Ti6Al7Nb for biomedical applications. Materials
Letters. Published online 2022. doi:10.1016/j.matlet.2022.132384
apa: Tillmann, W., Lopes Dias, N. F., Kokalj, D., Stangier, D., Hein, M., Hoyer,
K.-P., Schaper, M., Gödecke, D., Oltmanns, H., & Meißner, J. (2022). Tribo-functional
PVD thin films deposited onto additively manufactured Ti6Al7Nb for biomedical
applications. Materials Letters, Article 132384. https://doi.org/10.1016/j.matlet.2022.132384
bibtex: '@article{Tillmann_Lopes Dias_Kokalj_Stangier_Hein_Hoyer_Schaper_Gödecke_Oltmanns_Meißner_2022,
title={Tribo-functional PVD thin films deposited onto additively manufactured
Ti6Al7Nb for biomedical applications}, DOI={10.1016/j.matlet.2022.132384},
number={132384}, journal={Materials Letters}, publisher={Elsevier BV}, author={Tillmann,
Wolfgang and Lopes Dias, Nelson Filipe and Kokalj, David and Stangier, Dominic
and Hein, Maxwell and Hoyer, Kay-Peter and Schaper, Mirko and Gödecke, Daria and
Oltmanns, Hilke and Meißner, Jessica}, year={2022} }'
chicago: Tillmann, Wolfgang, Nelson Filipe Lopes Dias, David Kokalj, Dominic Stangier,
Maxwell Hein, Kay-Peter Hoyer, Mirko Schaper, Daria Gödecke, Hilke Oltmanns, and
Jessica Meißner. “Tribo-Functional PVD Thin Films Deposited onto Additively Manufactured
Ti6Al7Nb for Biomedical Applications.” Materials Letters, 2022. https://doi.org/10.1016/j.matlet.2022.132384.
ieee: 'W. Tillmann et al., “Tribo-functional PVD thin films deposited onto
additively manufactured Ti6Al7Nb for biomedical applications,” Materials Letters,
Art. no. 132384, 2022, doi: 10.1016/j.matlet.2022.132384.'
mla: Tillmann, Wolfgang, et al. “Tribo-Functional PVD Thin Films Deposited onto
Additively Manufactured Ti6Al7Nb for Biomedical Applications.” Materials Letters,
132384, Elsevier BV, 2022, doi:10.1016/j.matlet.2022.132384.
short: W. Tillmann, N.F. Lopes Dias, D. Kokalj, D. Stangier, M. Hein, K.-P. Hoyer,
M. Schaper, D. Gödecke, H. Oltmanns, J. Meißner, Materials Letters (2022).
date_created: 2022-05-07T12:31:45Z
date_updated: 2023-04-27T16:41:45Z
department:
- _id: '9'
- _id: '158'
doi: 10.1016/j.matlet.2022.132384
keyword:
- Mechanical Engineering
- Mechanics of Materials
- Condensed Matter Physics
- General Materials Science
language:
- iso: eng
publication: Materials Letters
publication_identifier:
issn:
- 0167-577X
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: Tribo-functional PVD thin films deposited onto additively manufactured Ti6Al7Nb
for biomedical applications
type: journal_article
user_id: '43720'
year: '2022'
...
---
_id: '41496'
article_number: '107235'
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: David
full_name: Kokalj, David
last_name: Kokalj
- 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, Kokalj D, et al. On the influence of physical vapor
deposited thin coatings on the low-cycle fatigue behavior of additively processed
Ti-6Al-7Nb alloy. International Journal of Fatigue. 2022;166. doi:10.1016/j.ijfatigue.2022.107235
apa: Hein, M., Lopes Dias, N. F., Kokalj, D., Stangier, D., Hoyer, K.-P., Tillmann,
W., & Schaper, M. (2022). On the influence of physical vapor deposited thin
coatings on the low-cycle fatigue behavior of additively processed Ti-6Al-7Nb
alloy. International Journal of Fatigue, 166, Article 107235. https://doi.org/10.1016/j.ijfatigue.2022.107235
bibtex: '@article{Hein_Lopes Dias_Kokalj_Stangier_Hoyer_Tillmann_Schaper_2022, title={On
the influence of physical vapor deposited thin coatings on the low-cycle fatigue
behavior of additively processed Ti-6Al-7Nb alloy}, volume={166}, DOI={10.1016/j.ijfatigue.2022.107235},
number={107235}, journal={International Journal of Fatigue}, publisher={Elsevier
BV}, author={Hein, Maxwell and Lopes Dias, Nelson Filipe and Kokalj, David and
Stangier, Dominic and Hoyer, Kay-Peter and Tillmann, Wolfgang and Schaper, Mirko},
year={2022} }'
chicago: Hein, Maxwell, Nelson Filipe Lopes Dias, David Kokalj, Dominic Stangier,
Kay-Peter Hoyer, Wolfgang Tillmann, and Mirko Schaper. “On the Influence of Physical
Vapor Deposited Thin Coatings on the Low-Cycle Fatigue Behavior of Additively
Processed Ti-6Al-7Nb Alloy.” International Journal of Fatigue 166 (2022).
https://doi.org/10.1016/j.ijfatigue.2022.107235.
ieee: 'M. Hein et al., “On the influence of physical vapor deposited thin
coatings on the low-cycle fatigue behavior of additively processed Ti-6Al-7Nb
alloy,” International Journal of Fatigue, vol. 166, Art. no. 107235, 2022,
doi: 10.1016/j.ijfatigue.2022.107235.'
mla: Hein, Maxwell, et al. “On the Influence of Physical Vapor Deposited Thin Coatings
on the Low-Cycle Fatigue Behavior of Additively Processed Ti-6Al-7Nb Alloy.” International
Journal of Fatigue, vol. 166, 107235, Elsevier BV, 2022, doi:10.1016/j.ijfatigue.2022.107235.
short: M. Hein, N.F. Lopes Dias, D. Kokalj, D. Stangier, K.-P. Hoyer, W. Tillmann,
M. Schaper, International Journal of Fatigue 166 (2022).
date_created: 2023-02-02T14:27:17Z
date_updated: 2023-04-27T16:45:58Z
department:
- _id: '9'
- _id: '158'
doi: 10.1016/j.ijfatigue.2022.107235
intvolume: ' 166'
keyword:
- Industrial and Manufacturing Engineering
- Mechanical Engineering
- Mechanics of Materials
- General Materials Science
- Modeling and Simulation
language:
- iso: eng
publication: International Journal of Fatigue
publication_identifier:
issn:
- 0142-1123
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: On the influence of physical vapor deposited thin coatings on the low-cycle
fatigue behavior of additively processed Ti-6Al-7Nb alloy
type: journal_article
user_id: '43720'
volume: 166
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: '41501'
article_number: '132384'
author:
- first_name: Wolfgang
full_name: Tillmann, Wolfgang
last_name: Tillmann
- first_name: Nelson Filipe
full_name: Lopes Dias, Nelson Filipe
last_name: Lopes Dias
- first_name: David
full_name: Kokalj, David
last_name: Kokalj
- first_name: Dominic
full_name: Stangier, Dominic
last_name: Stangier
- first_name: Maxwell
full_name: Hein, Maxwell
id: '52771'
last_name: Hein
orcid: 0000-0002-3732-2236
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
- first_name: Daria
full_name: Gödecke, Daria
last_name: Gödecke
- first_name: Hilke
full_name: Oltmanns, Hilke
last_name: Oltmanns
- first_name: Jessica
full_name: Meißner, Jessica
last_name: Meißner
citation:
ama: Tillmann W, Lopes Dias NF, Kokalj D, et al. Tribo-functional PVD thin films
deposited onto additively manufactured Ti6Al7Nb for biomedical applications. Materials
Letters. 2022;321. doi:10.1016/j.matlet.2022.132384
apa: Tillmann, W., Lopes Dias, N. F., Kokalj, D., Stangier, D., Hein, M., Hoyer,
K.-P., Schaper, M., Gödecke, D., Oltmanns, H., & Meißner, J. (2022). Tribo-functional
PVD thin films deposited onto additively manufactured Ti6Al7Nb for biomedical
applications. Materials Letters, 321, Article 132384. https://doi.org/10.1016/j.matlet.2022.132384
bibtex: '@article{Tillmann_Lopes Dias_Kokalj_Stangier_Hein_Hoyer_Schaper_Gödecke_Oltmanns_Meißner_2022,
title={Tribo-functional PVD thin films deposited onto additively manufactured
Ti6Al7Nb for biomedical applications}, volume={321}, DOI={10.1016/j.matlet.2022.132384},
number={132384}, journal={Materials Letters}, publisher={Elsevier BV}, author={Tillmann,
Wolfgang and Lopes Dias, Nelson Filipe and Kokalj, David and Stangier, Dominic
and Hein, Maxwell and Hoyer, Kay-Peter and Schaper, Mirko and Gödecke, Daria and
Oltmanns, Hilke and Meißner, Jessica}, year={2022} }'
chicago: Tillmann, Wolfgang, Nelson Filipe Lopes Dias, David Kokalj, Dominic Stangier,
Maxwell Hein, Kay-Peter Hoyer, Mirko Schaper, Daria Gödecke, Hilke Oltmanns, and
Jessica Meißner. “Tribo-Functional PVD Thin Films Deposited onto Additively Manufactured
Ti6Al7Nb for Biomedical Applications.” Materials Letters 321 (2022). https://doi.org/10.1016/j.matlet.2022.132384.
ieee: 'W. Tillmann et al., “Tribo-functional PVD thin films deposited onto
additively manufactured Ti6Al7Nb for biomedical applications,” Materials Letters,
vol. 321, Art. no. 132384, 2022, doi: 10.1016/j.matlet.2022.132384.'
mla: Tillmann, Wolfgang, et al. “Tribo-Functional PVD Thin Films Deposited onto
Additively Manufactured Ti6Al7Nb for Biomedical Applications.” Materials Letters,
vol. 321, 132384, Elsevier BV, 2022, doi:10.1016/j.matlet.2022.132384.
short: W. Tillmann, N.F. Lopes Dias, D. Kokalj, D. Stangier, M. Hein, K.-P. Hoyer,
M. Schaper, D. Gödecke, H. Oltmanns, J. Meißner, Materials Letters 321 (2022).
date_created: 2023-02-02T14:29:15Z
date_updated: 2023-04-27T16:46:18Z
department:
- _id: '9'
- _id: '158'
doi: 10.1016/j.matlet.2022.132384
intvolume: ' 321'
keyword:
- Mechanical Engineering
- Mechanics of Materials
- Condensed Matter Physics
- General Materials Science
language:
- iso: eng
publication: Materials Letters
publication_identifier:
issn:
- 0167-577X
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: Tribo-functional PVD thin films deposited onto additively manufactured Ti6Al7Nb
for biomedical applications
type: journal_article
user_id: '43720'
volume: 321
year: '2022'
...
---
_id: '33338'
author:
- first_name: Maxwell
full_name: Hein, Maxwell
id: '52771'
last_name: Hein
orcid: 0000-0002-3732-2236
citation:
ama: Hein M. Influence of Physical Vapor Deposition on High-Cycle Fatigue Performance
of Additively Manufactured Ti-6Al-7Nb Alloy. Crystals. Published online
2022. doi:10.3390/cryst12091190
apa: Hein, M. (2022). Influence of Physical Vapor Deposition on High-Cycle Fatigue
Performance of Additively Manufactured Ti-6Al-7Nb Alloy. Crystals. https://doi.org/10.3390/cryst12091190
bibtex: '@article{Hein_2022, title={Influence of Physical Vapor Deposition on High-Cycle
Fatigue Performance of Additively Manufactured Ti-6Al-7Nb Alloy}, DOI={10.3390/cryst12091190},
journal={Crystals}, publisher={MDPI}, author={Hein, Maxwell}, year={2022} }'
chicago: Hein, Maxwell. “Influence of Physical Vapor Deposition on High-Cycle Fatigue
Performance of Additively Manufactured Ti-6Al-7Nb Alloy.” Crystals, 2022.
https://doi.org/10.3390/cryst12091190.
ieee: 'M. Hein, “Influence of Physical Vapor Deposition on High-Cycle Fatigue Performance
of Additively Manufactured Ti-6Al-7Nb Alloy,” Crystals, 2022, doi: 10.3390/cryst12091190.'
mla: Hein, Maxwell. “Influence of Physical Vapor Deposition on High-Cycle Fatigue
Performance of Additively Manufactured Ti-6Al-7Nb Alloy.” Crystals, MDPI,
2022, doi:10.3390/cryst12091190.
short: M. Hein, Crystals (2022).
date_created: 2022-09-12T13:28:47Z
date_updated: 2023-05-02T08:26:25Z
ddc:
- '620'
department:
- _id: '9'
- _id: '158'
doi: 10.3390/cryst12091190
file:
- access_level: open_access
content_type: application/pdf
creator: maxhein
date_created: 2022-09-12T13:28:38Z
date_updated: 2022-09-12T13:28:38Z
file_id: '33339'
file_name: Hein - 2022 - Influence of Physical Vapor Deposition on High-Cycle Fatigue
Performance of Additively Manufactured Ti-6Al-7Nb Alloy.pdf
file_size: 4230901
relation: main_file
file_date_updated: 2022-09-12T13:28:38Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
publication: Crystals
publisher: MDPI
quality_controlled: '1'
status: public
title: Influence of Physical Vapor Deposition on High-Cycle Fatigue Performance of
Additively Manufactured Ti-6Al-7Nb Alloy
type: journal_article
user_id: '52771'
year: '2022'
...
---
_id: '33340'
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.
Published online 2022.
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.
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}, journal={Materials}, 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,
2022.
ieee: M. Hein et al., “Heat Treatments of Metastable β Titanium Alloy Ti-24Nb-4Zr-8Sn
Processed by Laser Powder Bed Fusion,” Materials, 2022.
mla: Hein, Maxwell, et al. “Heat Treatments of Metastable β Titanium Alloy Ti-24Nb-4Zr-8Sn
Processed by Laser Powder Bed Fusion.” Materials, 2022.
short: M. Hein, N.F. Lopes Dias, S. Pramanik, D. Stangier, K.-P. Hoyer, W. Tillmann,
M. Schaper, Materials (2022).
date_created: 2022-09-12T13:29:29Z
date_updated: 2023-06-01T14:21:03Z
ddc:
- '620'
department:
- _id: '9'
- _id: '158'
file:
- access_level: open_access
content_type: application/pdf
creator: maxhein
date_created: 2022-09-12T13:29:24Z
date_updated: 2022-09-12T13:29:24Z
file_id: '33341'
file_name: Hein et al - 2022 - Heat Treatments of Metastable β Titanium Alloy Ti-24Nb-4Zr-8Sn
Processed by Laser Powder Bed Fusion.pdf
file_size: 13523227
relation: main_file
file_date_updated: 2022-09-12T13:29:24Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
publication: Materials
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'
year: '2022'
...
---
_id: '41511'
author:
- first_name: Maxwell
full_name: Hein, Maxwell
id: '52771'
last_name: Hein
orcid: 0000-0002-3732-2236
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
citation:
ama: Hein M, Hoyer K-P, Schaper M. Additively processed TiAl6Nb7 alloy for biomedical
applications. Materialwissenschaft und Werkstofftechnik. 2021;52(7):703-716.
doi:10.1002/mawe.202000288
apa: Hein, M., Hoyer, K.-P., & Schaper, M. (2021). Additively processed TiAl6Nb7
alloy for biomedical applications. Materialwissenschaft Und Werkstofftechnik,
52(7), 703–716. https://doi.org/10.1002/mawe.202000288
bibtex: '@article{Hein_Hoyer_Schaper_2021, title={Additively processed TiAl6Nb7
alloy for biomedical applications}, volume={52}, DOI={10.1002/mawe.202000288},
number={7}, journal={Materialwissenschaft und Werkstofftechnik}, publisher={Wiley},
author={Hein, Maxwell and Hoyer, Kay-Peter and Schaper, Mirko}, year={2021}, pages={703–716}
}'
chicago: 'Hein, Maxwell, Kay-Peter Hoyer, and Mirko Schaper. “Additively Processed
TiAl6Nb7 Alloy for Biomedical Applications.” Materialwissenschaft Und Werkstofftechnik
52, no. 7 (2021): 703–16. https://doi.org/10.1002/mawe.202000288.'
ieee: 'M. Hein, K.-P. Hoyer, and M. Schaper, “Additively processed TiAl6Nb7 alloy
for biomedical applications,” Materialwissenschaft und Werkstofftechnik,
vol. 52, no. 7, pp. 703–716, 2021, doi: 10.1002/mawe.202000288.'
mla: Hein, Maxwell, et al. “Additively Processed TiAl6Nb7 Alloy for Biomedical Applications.”
Materialwissenschaft Und Werkstofftechnik, vol. 52, no. 7, Wiley, 2021,
pp. 703–16, doi:10.1002/mawe.202000288.
short: M. Hein, K.-P. Hoyer, M. Schaper, Materialwissenschaft Und Werkstofftechnik
52 (2021) 703–716.
date_created: 2023-02-02T14:33:23Z
date_updated: 2023-06-01T14:33:34Z
department:
- _id: '9'
- _id: '158'
doi: 10.1002/mawe.202000288
intvolume: ' 52'
issue: '7'
keyword:
- Mechanical Engineering
- Mechanics of Materials
- Condensed Matter Physics
- General Materials Science
language:
- iso: eng
page: 703-716
publication: Materialwissenschaft und Werkstofftechnik
publication_identifier:
issn:
- 0933-5137
- 1521-4052
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Additively processed TiAl6Nb7 alloy for biomedical applications
type: journal_article
user_id: '43720'
volume: 52
year: '2021'
...
---
_id: '41516'
article_number: '127384'
author:
- first_name: Wolfgang
full_name: Tillmann, Wolfgang
last_name: Tillmann
- first_name: Nelson Filipe
full_name: Lopes Dias, Nelson Filipe
last_name: Lopes Dias
- first_name: Carlo
full_name: Franke, Carlo
last_name: Franke
- first_name: David
full_name: Kokalj, David
last_name: Kokalj
- first_name: Dominic
full_name: Stangier, Dominic
last_name: Stangier
- first_name: Viviane
full_name: Filor, Viviane
last_name: Filor
- first_name: Rafael Hernán
full_name: Mateus-Vargas, Rafael Hernán
last_name: Mateus-Vargas
- first_name: Hilke
full_name: Oltmanns, Hilke
last_name: Oltmanns
- first_name: Manfred
full_name: Kietzmann, Manfred
last_name: Kietzmann
- first_name: Jessica
full_name: Meißner, Jessica
last_name: Meißner
- first_name: Maxwell
full_name: Hein, Maxwell
id: '52771'
last_name: Hein
orcid: 0000-0002-3732-2236
- first_name: Sudipta
full_name: Pramanik, Sudipta
last_name: Pramanik
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
- first_name: Alexander
full_name: Nienhaus, Alexander
last_name: Nienhaus
- first_name: Carl Arne
full_name: Thomann, Carl Arne
last_name: Thomann
- first_name: Jörg
full_name: Debus, Jörg
last_name: Debus
citation:
ama: Tillmann W, Lopes Dias NF, Franke C, et al. Tribo-mechanical properties and
biocompatibility of Ag-containing amorphous carbon films deposited onto Ti6Al4V.
Surface and Coatings Technology. 2021;421. doi:10.1016/j.surfcoat.2021.127384
apa: Tillmann, W., Lopes Dias, N. F., Franke, C., Kokalj, D., Stangier, D., Filor,
V., Mateus-Vargas, R. H., Oltmanns, H., Kietzmann, M., Meißner, J., Hein, M.,
Pramanik, S., Hoyer, K.-P., Schaper, M., Nienhaus, A., Thomann, C. A., & Debus,
J. (2021). Tribo-mechanical properties and biocompatibility of Ag-containing amorphous
carbon films deposited onto Ti6Al4V. Surface and Coatings Technology, 421,
Article 127384. https://doi.org/10.1016/j.surfcoat.2021.127384
bibtex: '@article{Tillmann_Lopes Dias_Franke_Kokalj_Stangier_Filor_Mateus-Vargas_Oltmanns_Kietzmann_Meißner_et
al._2021, title={Tribo-mechanical properties and biocompatibility of Ag-containing
amorphous carbon films deposited onto Ti6Al4V}, volume={421}, DOI={10.1016/j.surfcoat.2021.127384},
number={127384}, journal={Surface and Coatings Technology}, publisher={Elsevier
BV}, author={Tillmann, Wolfgang and Lopes Dias, Nelson Filipe and Franke, Carlo
and Kokalj, David and Stangier, Dominic and Filor, Viviane and Mateus-Vargas,
Rafael Hernán and Oltmanns, Hilke and Kietzmann, Manfred and Meißner, Jessica
and et al.}, year={2021} }'
chicago: Tillmann, Wolfgang, Nelson Filipe Lopes Dias, Carlo Franke, David Kokalj,
Dominic Stangier, Viviane Filor, Rafael Hernán Mateus-Vargas, et al. “Tribo-Mechanical
Properties and Biocompatibility of Ag-Containing Amorphous Carbon Films Deposited
onto Ti6Al4V.” Surface and Coatings Technology 421 (2021). https://doi.org/10.1016/j.surfcoat.2021.127384.
ieee: 'W. Tillmann et al., “Tribo-mechanical properties and biocompatibility
of Ag-containing amorphous carbon films deposited onto Ti6Al4V,” Surface and
Coatings Technology, vol. 421, Art. no. 127384, 2021, doi: 10.1016/j.surfcoat.2021.127384.'
mla: Tillmann, Wolfgang, et al. “Tribo-Mechanical Properties and Biocompatibility
of Ag-Containing Amorphous Carbon Films Deposited onto Ti6Al4V.” Surface and
Coatings Technology, vol. 421, 127384, Elsevier BV, 2021, doi:10.1016/j.surfcoat.2021.127384.
short: W. Tillmann, N.F. Lopes Dias, C. Franke, D. Kokalj, D. Stangier, V. Filor,
R.H. Mateus-Vargas, H. Oltmanns, M. Kietzmann, J. Meißner, M. Hein, S. Pramanik,
K.-P. Hoyer, M. Schaper, A. Nienhaus, C.A. Thomann, J. Debus, Surface and Coatings
Technology 421 (2021).
date_created: 2023-02-02T14:35:21Z
date_updated: 2023-06-01T14:33:50Z
department:
- _id: '9'
- _id: '158'
doi: 10.1016/j.surfcoat.2021.127384
intvolume: ' 421'
keyword:
- Materials Chemistry
- Surfaces
- Coatings and Films
- Surfaces and Interfaces
- Condensed Matter Physics
- General Chemistry
language:
- iso: eng
publication: Surface and Coatings Technology
publication_identifier:
issn:
- 0257-8972
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: Tribo-mechanical properties and biocompatibility of Ag-containing amorphous
carbon films deposited onto Ti6Al4V
type: journal_article
user_id: '43720'
volume: 421
year: '2021'
...
---
_id: '24243'
abstract:
- lang: eng
text: "The addition of Ag to amorphous carbon (a-C) films is highly effective in
tailoring the tribo-mechanical properties and biocompatibility. For biomedical
applications, Ag-containing a-C (a-C:Ag) represents a promising film material
for improving the biofunctional surface properties of Ti-based alloys. In a sputtering
process, a-C:Ag films, with Ag contents up to 7.5 at.%, were deposited with a
chemically graded TixCy interlayer onto Ti6Al4V. The tribo-mechanical and biocompatible
properties of a-C:Ag were evaluated. The influence of the Ag content on these
properties was analyzed and compared to those of uncoated Ti6Al4V.\r\n\r\nRaman
spectroscopy reveals that the amount of incorporated Ag does not induce significant
structural changes in the disordered network, only a reduced number of vacancies
and sp3-coordinated C bonds within the sp2-dominant a-C network is assigned to
the films with high Ag concentration. With increasing Ag content, stresses, hardness,
and elastic modulus decrease from (2.02 ± 0.07) to (1.15 ± 0.03) GPa, from (17.4
± 1.5) to (13.4 ± 0.9) GPa, and from (171.8 ± 8.1) to (138.5 ± 5.8) GPa, respectively.
In tribometer tests, the friction behavior against Al2O3 in lubricated condition
with a simulated-body-fluid-based lubricant is not affected by the Ag concentration,
but the Al2O3 counterpart wear is reduced for all a-C:Ag films compared to a-C.
The friction against ultra-high-molecular-weight polyethylene (UHMWPE) decreases
continuously with increasing Ag concentration and the counterpart wear is lower
at higher Ag contents. Compared to a-C:Ag, Ti6Al4V demonstrates lower friction
against UHMWPE and higher friction against Al2O3. The a-C:Ag films are not exposed
to abrasion by Al2O3 or pronounced material transfer of UHMWPE. The hardness difference
and chemical affinity between the friction partners are decisive for the tribological
behavior of a-C:Ag. Compared to Ti6Al4V, the a-C:Ag films show antibacterial activity
against Staphylococcus aureus, while the proliferation of osteoblast-like cells
is reduced by Ag."
article_number: '127384'
author:
- first_name: Wolfgang
full_name: Tillmann, Wolfgang
last_name: Tillmann
- first_name: Nelson Filipe
full_name: Lopes Dias, Nelson Filipe
last_name: Lopes Dias
- first_name: Carlo
full_name: Franke, Carlo
last_name: Franke
- first_name: David
full_name: Kokalj, David
last_name: Kokalj
- first_name: Dominic
full_name: Stangier, Dominic
last_name: Stangier
- first_name: Viviane
full_name: Filor, Viviane
last_name: Filor
- first_name: Rafael Hernán
full_name: Mateus-Vargas, Rafael Hernán
last_name: Mateus-Vargas
- first_name: Hilke
full_name: Oltmanns, Hilke
last_name: Oltmanns
- first_name: Manfred
full_name: Kietzmann, Manfred
last_name: Kietzmann
- first_name: Jessica
full_name: Meißner, Jessica
last_name: Meißner
- first_name: Maxwell
full_name: Hein, Maxwell
id: '52771'
last_name: Hein
orcid: 0000-0002-3732-2236
- first_name: Sudipta
full_name: Pramanik, Sudipta
last_name: Pramanik
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
- first_name: Alexander
full_name: Nienhaus, Alexander
last_name: Nienhaus
- first_name: Carl Arne
full_name: Thomann, Carl Arne
last_name: Thomann
- first_name: Jörg
full_name: Debus, Jörg
last_name: Debus
citation:
ama: Tillmann W, Lopes Dias NF, Franke C, et al. Tribo-mechanical properties and
biocompatibility of Ag-containing amorphous carbon films deposited onto Ti6Al4V.
Surface and Coatings Technology. Published online 2021. doi:10.1016/j.surfcoat.2021.127384
apa: Tillmann, W., Lopes Dias, N. F., Franke, C., Kokalj, D., Stangier, D., Filor,
V., Mateus-Vargas, R. H., Oltmanns, H., Kietzmann, M., Meißner, J., Hein, M.,
Pramanik, S., Hoyer, K.-P., Schaper, M., Nienhaus, A., Thomann, C. A., & Debus,
J. (2021). Tribo-mechanical properties and biocompatibility of Ag-containing amorphous
carbon films deposited onto Ti6Al4V. Surface and Coatings Technology, Article
127384. https://doi.org/10.1016/j.surfcoat.2021.127384
bibtex: '@article{Tillmann_Lopes Dias_Franke_Kokalj_Stangier_Filor_Mateus-Vargas_Oltmanns_Kietzmann_Meißner_et
al._2021, title={Tribo-mechanical properties and biocompatibility of Ag-containing
amorphous carbon films deposited onto Ti6Al4V}, DOI={10.1016/j.surfcoat.2021.127384},
number={127384}, journal={Surface and Coatings Technology}, author={Tillmann,
Wolfgang and Lopes Dias, Nelson Filipe and Franke, Carlo and Kokalj, David and
Stangier, Dominic and Filor, Viviane and Mateus-Vargas, Rafael Hernán and Oltmanns,
Hilke and Kietzmann, Manfred and Meißner, Jessica and et al.}, year={2021} }'
chicago: Tillmann, Wolfgang, Nelson Filipe Lopes Dias, Carlo Franke, David Kokalj,
Dominic Stangier, Viviane Filor, Rafael Hernán Mateus-Vargas, et al. “Tribo-Mechanical
Properties and Biocompatibility of Ag-Containing Amorphous Carbon Films Deposited
onto Ti6Al4V.” Surface and Coatings Technology, 2021. https://doi.org/10.1016/j.surfcoat.2021.127384.
ieee: 'W. Tillmann et al., “Tribo-mechanical properties and biocompatibility
of Ag-containing amorphous carbon films deposited onto Ti6Al4V,” Surface and
Coatings Technology, Art. no. 127384, 2021, doi: 10.1016/j.surfcoat.2021.127384.'
mla: Tillmann, Wolfgang, et al. “Tribo-Mechanical Properties and Biocompatibility
of Ag-Containing Amorphous Carbon Films Deposited onto Ti6Al4V.” Surface and
Coatings Technology, 127384, 2021, doi:10.1016/j.surfcoat.2021.127384.
short: W. Tillmann, N.F. Lopes Dias, C. Franke, D. Kokalj, D. Stangier, V. Filor,
R.H. Mateus-Vargas, H. Oltmanns, M. Kietzmann, J. Meißner, M. Hein, S. Pramanik,
K.-P. Hoyer, M. Schaper, A. Nienhaus, C.A. Thomann, J. Debus, Surface and Coatings
Technology (2021).
date_created: 2021-09-13T08:53:05Z
date_updated: 2023-06-01T14:38:10Z
department:
- _id: '158'
doi: 10.1016/j.surfcoat.2021.127384
language:
- iso: eng
publication: Surface and Coatings Technology
publication_identifier:
issn:
- 0257-8972
publication_status: published
quality_controlled: '1'
status: public
title: Tribo-mechanical properties and biocompatibility of Ag-containing amorphous
carbon films deposited onto Ti6Al4V
type: journal_article
user_id: '43720'
year: '2021'
...
---
_id: '24086'
abstract:
- lang: eng
text: "Laser beam melting (LBM) is an advanced manufacturing technology providing\r\nspecial
features and the possibility to produce complex and individual parts directly\r\nfrom
a CAD model. TiAl6V4 is the most common used titanium alloy particularly\r\nin
biomedical applications. TiAl6Nb7 shows promising improvements especially\r\nregarding
biocompatible properties due to the substitution of the hazardous\r\nvanadium.
This work focuses on the examination of laser beam melted TiAl6Nb7.\r\nFor microstructural
investigation scanning electron microscopy including energydispersive\r\nx-ray
spectroscopy as well as electron backscatter diffraction are utilized.\r\nThe
laser beam melted related acicular microstructure as well as the corresponding\r\nmechanical
properties, which are determined by hardness measurements\r\nand tensile tests,
are investigated. The laser beam melted alloy meets,\r\nexcept of breaking elongation
A, the mechanical demands like ultimate tensile\r\nstrength Rm, yield strength
Rp0.2, Vickers hardness HV of international standard\r\nISO 5832-11. Next steps
contain comparison between TiAl6Nb7 and TiAl6V4 in\r\ndifferent conditions. Further
investigations aim at improving mechanical properties\r\nof TiAl6Nb7 by heat treatments
and assessment of their influence on the microstructure\r\nas well as examination
regarding the corrosive behavior in human bodylike\r\nconditions."
article_type: original
author:
- first_name: Maxwell
full_name: Hein, Maxwell
id: '52771'
last_name: Hein
orcid: 0000-0002-3732-2236
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
citation:
ama: Hein M, Hoyer K-P, Schaper M. Additively processed TiAl6Nb7 alloy for biomedical
applications. Materialwissenschaft und Werkstofftechnik. 2021;52:703-716.
doi:10.1002/mawe.202000288
apa: Hein, M., Hoyer, K.-P., & Schaper, M. (2021). Additively processed TiAl6Nb7
alloy for biomedical applications. Materialwissenschaft Und Werkstofftechnik,
52, 703–716. https://doi.org/10.1002/mawe.202000288
bibtex: '@article{Hein_Hoyer_Schaper_2021, title={Additively processed TiAl6Nb7
alloy for biomedical applications}, volume={52}, DOI={10.1002/mawe.202000288},
journal={Materialwissenschaft und Werkstofftechnik}, author={Hein, Maxwell and
Hoyer, Kay-Peter and Schaper, Mirko}, year={2021}, pages={703–716} }'
chicago: 'Hein, Maxwell, Kay-Peter Hoyer, and Mirko Schaper. “Additively Processed
TiAl6Nb7 Alloy for Biomedical Applications.” Materialwissenschaft Und Werkstofftechnik
52 (2021): 703–16. https://doi.org/10.1002/mawe.202000288.'
ieee: 'M. Hein, K.-P. Hoyer, and M. Schaper, “Additively processed TiAl6Nb7 alloy
for biomedical applications,” Materialwissenschaft und Werkstofftechnik,
vol. 52, pp. 703–716, 2021, doi: 10.1002/mawe.202000288.'
mla: Hein, Maxwell, et al. “Additively Processed TiAl6Nb7 Alloy for Biomedical Applications.”
Materialwissenschaft Und Werkstofftechnik, vol. 52, 2021, pp. 703–16, doi:10.1002/mawe.202000288.
short: M. Hein, K.-P. Hoyer, M. Schaper, Materialwissenschaft Und Werkstofftechnik
52 (2021) 703–716.
date_created: 2021-09-09T15:40:08Z
date_updated: 2023-06-01T14:38:03Z
department:
- _id: '158'
doi: 10.1002/mawe.202000288
intvolume: ' 52'
keyword:
- Laser beam melting
- titanium alloy
- TiAl6Nb7
- biomedical engineering
- implants
language:
- iso: eng
page: 703-716
publication: Materialwissenschaft und Werkstofftechnik
publication_identifier:
issn:
- 0933-5137
- 1521-4052
publication_status: published
quality_controlled: '1'
status: public
title: Additively processed TiAl6Nb7 alloy for biomedical applications
type: journal_article
user_id: '43720'
volume: 52
year: '2021'
...