---
_id: '63512'
abstract:
- lang: eng
  text: "The state of the art shows that PBF-LB/M offers great potential for pressure-loaded
    parts, with significant weight reductions and simultaneous optimization of flow
    resistance. This study is aimed at applying existing calculation methods for pressure-loaded
    parts to additively manufactured pipe structures, considering the two materials
    EN AC-43000 (3.2381, AlSi10Mg) and AISI 316L (1.4404, X2CrNiMo17-12-2). For this
    purpose, systematic tensile tests are carried out for both materials. In addition,
    a statistical evaluation is performed to determine the design-relevant strength
    characteristics with a survival probability Ps of 97.5 % for both materials in
    the as-built and heat-treated condition.\r\nPipe specimens are manufactured, half
    of which are heat treated, geometrically measured and then subjected to a burst
    pressure test to experimentally determine the failure-critical internal pressure.
    These results are compared with calculated burst pressures. The calculations are
    based on the application-relevant methods identified in this study, considering
    the strength values determined for the respective material condition. This comparison
    is used to assess the suitability of the calculation methods for additively manufactured
    pipe structures, based on the materials investigated."
article_number: '105753'
author:
- first_name: Thorsten
  full_name: Koers, Thorsten
  id: '38077'
  last_name: Koers
- first_name: Balázs
  full_name: Magyar, Balázs
  id: '97759'
  last_name: Magyar
- first_name: Christian
  full_name: Bödger, Christian
  id: '93904'
  last_name: Bödger
- first_name: Thomas
  full_name: Tröster, Thomas
  id: '553'
  last_name: Tröster
citation:
  ama: Koers T, Magyar B, Bödger C, Tröster T. Analytical and experimental determination
    of the failure-critical pressure of pipe structures manufactured by PBF-LB/M.
    <i>International Journal of Pressure Vessels and Piping</i>. Published online
    2026. doi:<a href="https://doi.org/10.1016/j.ijpvp.2026.105753">10.1016/j.ijpvp.2026.105753</a>
  apa: Koers, T., Magyar, B., Bödger, C., &#38; Tröster, T. (2026). Analytical and
    experimental determination of the failure-critical pressure of pipe structures
    manufactured by PBF-LB/M. <i>International Journal of Pressure Vessels and Piping</i>,
    Article 105753. <a href="https://doi.org/10.1016/j.ijpvp.2026.105753">https://doi.org/10.1016/j.ijpvp.2026.105753</a>
  bibtex: '@article{Koers_Magyar_Bödger_Tröster_2026, title={Analytical and experimental
    determination of the failure-critical pressure of pipe structures manufactured
    by PBF-LB/M}, DOI={<a href="https://doi.org/10.1016/j.ijpvp.2026.105753">10.1016/j.ijpvp.2026.105753</a>},
    number={105753}, journal={International Journal of Pressure Vessels and Piping},
    publisher={Elsevier BV}, author={Koers, Thorsten and Magyar, Balázs and Bödger,
    Christian and Tröster, Thomas}, year={2026} }'
  chicago: Koers, Thorsten, Balázs Magyar, Christian Bödger, and Thomas Tröster. “Analytical
    and Experimental Determination of the Failure-Critical Pressure of Pipe Structures
    Manufactured by PBF-LB/M.” <i>International Journal of Pressure Vessels and Piping</i>,
    2026. <a href="https://doi.org/10.1016/j.ijpvp.2026.105753">https://doi.org/10.1016/j.ijpvp.2026.105753</a>.
  ieee: 'T. Koers, B. Magyar, C. Bödger, and T. Tröster, “Analytical and experimental
    determination of the failure-critical pressure of pipe structures manufactured
    by PBF-LB/M,” <i>International Journal of Pressure Vessels and Piping</i>, Art.
    no. 105753, 2026, doi: <a href="https://doi.org/10.1016/j.ijpvp.2026.105753">10.1016/j.ijpvp.2026.105753</a>.'
  mla: Koers, Thorsten, et al. “Analytical and Experimental Determination of the Failure-Critical
    Pressure of Pipe Structures Manufactured by PBF-LB/M.” <i>International Journal
    of Pressure Vessels and Piping</i>, 105753, Elsevier BV, 2026, doi:<a href="https://doi.org/10.1016/j.ijpvp.2026.105753">10.1016/j.ijpvp.2026.105753</a>.
  short: T. Koers, B. Magyar, C. Bödger, T. Tröster, International Journal of Pressure
    Vessels and Piping (2026).
date_created: 2026-01-07T08:39:04Z
date_updated: 2026-01-14T11:56:01Z
department:
- _id: '146'
- _id: '9'
- _id: '624'
- _id: '149'
- _id: '321'
doi: 10.1016/j.ijpvp.2026.105753
keyword:
- PBF-LB/M
- Pipe structures
- Strength assessment
- Burst pressure test
- Geometrical deviations
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1016/j.ijpvp.2026.105753
oa: '1'
publication: International Journal of Pressure Vessels and Piping
publication_identifier:
  issn:
  - 0308-0161
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: Analytical and experimental determination of the failure-critical pressure
  of pipe structures manufactured by PBF-LB/M
type: journal_article
user_id: '97759'
year: '2026'
...
---
_id: '28017'
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.
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
  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
  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. <i>Materials</i>. Published online 2021. doi:<a href="https://doi.org/10.3390/ma14237190">https://doi.org/10.3390/ma14237190</a>
  apa: Heiland, S., Milkereit, B., Hoyer, K.-P., Zhuravlev, E., Keßler, O., &#38;
    Schaper, M. (2021). Requirements for Processing High-Strength AlZnMgCu Alloys
    with PBF-LB/M to Achieve Crack-Free and Dense Parts. <i>Materials</i>. <a href="https://doi.org/10.3390/ma14237190">https://doi.org/10.3390/ma14237190</a>
  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}, DOI={<a href="https://doi.org/10.3390/ma14237190">https://doi.org/10.3390/ma14237190</a>},
    journal={Materials}, 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.” <i>Materials</i>,
    2021. <a href="https://doi.org/10.3390/ma14237190">https://doi.org/10.3390/ma14237190</a>.
  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,” <i>Materials</i>, 2021, doi: <a href="https://doi.org/10.3390/ma14237190">https://doi.org/10.3390/ma14237190</a>.'
  mla: Heiland, Steffen, et al. “Requirements for Processing High-Strength AlZnMgCu
    Alloys with PBF-LB/M to Achieve Crack-Free and Dense Parts.” <i>Materials</i>,
    2021, doi:<a href="https://doi.org/10.3390/ma14237190">https://doi.org/10.3390/ma14237190</a>.
  short: S. Heiland, B. Milkereit, K.-P. Hoyer, E. Zhuravlev, O. Keßler, M. Schaper,
    Materials (2021).
date_created: 2021-11-29T08:23:43Z
date_updated: 2022-01-06T06:57:50Z
ddc:
- '620'
department:
- _id: '9'
- _id: '158'
- _id: '219'
doi: https://doi.org/10.3390/ma14237190
file:
- access_level: closed
  content_type: application/pdf
  creator: heilands
  date_created: 2021-11-29T08:19:19Z
  date_updated: 2021-11-29T08:19:19Z
  file_id: '28018'
  file_name: 2021_Heiland_MDPI Materials_Requirements for Processing High-Strength
    AlZnMgCu Alloys with PBF-LBM to Achieve Crack-Free and Dense Parts_print.pdf
  file_size: 2202343
  relation: main_file
  success: 1
file_date_updated: 2021-11-29T08:19:19Z
has_accepted_license: '1'
keyword:
- grain refinement
- crack reduction
- laser beam melting
- aluminum alloy
- titanium carbide
- nanoparticle
- PBF-LB/M
language:
- iso: eng
main_file_link:
- url: https://www.mdpi.com/1996-1944/14/23/7190/htm
publication: Materials
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: '77250'
year: '2021'
...
---
_id: '26900'
abstract:
- lang: ger
  text: "Mit Hilfe der additiven Fertigung, insbesondere dem pulverbettbasierten selektiven
    Laserstrahl-schmelzen (LBM), können hochkomplexe Strukturen endkonturnah hergestellt
    werden. Die große Designfreiheit ermöglicht, zelluläre Leichtbaustrukturen zu
    erzeugen, deren mikrostrukturellen und mechanischen Eigenschaften direkt vom generativen
    Fertigungsverfahren abhängen. Insbesondere im Bereich des Leichtbaus bieten zelluläre
    Strukturen neue Ansätze zur Verminderung des Energieverbrauchs. Um dieses Potential
    vollständig ausschöpfen zu können, müssen die Effekte, die zum Versagen der Bauteile
    mit integrierten Gitterstrukturen führen, quantitativ beschrieben und verstanden
    werden. Dies ist Voraussetzung für eine sichere Auslegung. Dazu werden im Rahmen
    der vorliegenden Arbeit die charakteristischen Eigenschaften dieser Strukturen
    sowie die Einflussgrößen im Aufbauprozess näher beleuchtet.\r\nIm Rahmen dieser
    Dissertation werden numerische und experimentelle Untersuchungen von zwei unterschiedlichen
    Gitterstrukturtypen aus den Werkstoffen 316L und TiAl6V4 vorgestellt. Beide Werkstoffe
    werden unter monotoner, einachsiger Belastung getestet. Die parallel dazu durchgeführte
    digitale Bildkorrelation (DIC) ermöglicht gleichzeitig die detaillierte Analyse
    der lokalen Dehnungsverteilung während der Verformung. Mikrostrukturelle Eigenschaften
    und die resultierenden Gittercharakteristika werden mit Hilfe von rasterelektronenmikroskopischen
    Analysemethoden untersucht. Zudem erfolgt die Entwicklung eines Finite-Elemente-
    Modells, mit der Anforderung eines möglichst geringen Rechenaufwandes. Ein abschließender
    Vergleich der realen Dehnungsverteilung mit der FE- Analyse verifiziert das Modell."
author:
- first_name: Alexander
  full_name: Sieger, Alexander
  last_name: Sieger
citation:
  ama: Sieger A. <i>Mikrostrukturausprägung additiv gefertigter Gitterstrukturen</i>.
    Vol 23.; 2021.
  apa: Sieger, A. (2021). <i>Mikrostrukturausprägung additiv gefertigter Gitterstrukturen</i>
    (Vol. 23).
  bibtex: '@book{Sieger_2021, series={Forschungsberichte des Direct Manufacturing
    Research Centers}, title={Mikrostrukturausprägung additiv gefertigter Gitterstrukturen},
    volume={23}, author={Sieger, Alexander}, year={2021}, collection={Forschungsberichte
    des Direct Manufacturing Research Centers} }'
  chicago: Sieger, Alexander. <i>Mikrostrukturausprägung additiv gefertigter Gitterstrukturen</i>.
    Vol. 23. Forschungsberichte des Direct Manufacturing Research Centers, 2021.
  ieee: A. Sieger, <i>Mikrostrukturausprägung additiv gefertigter Gitterstrukturen</i>,
    vol. 23. 2021.
  mla: Sieger, Alexander. <i>Mikrostrukturausprägung additiv gefertigter Gitterstrukturen</i>.
    2021.
  short: A. Sieger, Mikrostrukturausprägung additiv gefertigter Gitterstrukturen,
    2021.
date_created: 2021-10-26T13:35:56Z
date_updated: 2022-01-06T06:57:30Z
department:
- _id: '9'
- _id: '158'
- _id: '219'
extern: '1'
intvolume: '        23'
keyword:
- Additive Fertigung
- TiAl6V4
- 316L
- Gitterstrukturen
- L-PBF
language:
- iso: ger
page: '136'
publication_identifier:
  isbn:
  - "\t978-3-8440-7924-1"
publication_status: published
series_title: Forschungsberichte des Direct Manufacturing Research Centers
status: public
title: Mikrostrukturausprägung additiv gefertigter Gitterstrukturen
type: dissertation
user_id: '77250'
volume: 23
year: '2021'
...
---
_id: '33282'
abstract:
- lang: eng
  text: "We derive a criterium for the almost sure finiteness of perpetual integrals
    of L ́evy\r\nprocesses for a class of real functions including all continuous
    functions and for general one-\r\ndimensional L ́evy processes that drifts to
    plus infinity. This generalizes previous work of D ̈oring\r\nand Kyprianou, who
    considered L ́evy processes having a local time, leaving the general case as an\r\nopen
    problem. It turns out, that the criterium in the general situation simplifies
    significantly in\r\nthe situation, where the process has a local time, but we
    also demonstrate that in general our cri-\r\nterium can not be reduced. This answers
    an open problem posed in D ̈oring, L. and Kyprianou, A.\r\n(2015)."
author:
- first_name: Martin
  full_name: Kolb, Martin
  id: '48880'
  last_name: Kolb
- first_name: Mladen
  full_name: Savov, Mladen
  last_name: Savov
citation:
  ama: Kolb M, Savov M. A Characterization of the Finiteness of Perpetual Integrals
    of Levy Processes. <i>Bernoulli</i>. 2020;26(2):1453-1472. doi:<a href="https://doi.org/10.48550/arXiv.1903.03792">https://doi.org/10.48550/arXiv.1903.03792</a>
  apa: Kolb, M., &#38; Savov, M. (2020). A Characterization of the Finiteness of Perpetual
    Integrals of Levy Processes. <i>Bernoulli</i>, <i>26</i>(2), 1453–1472. <a href="https://doi.org/10.48550/arXiv.1903.03792">https://doi.org/10.48550/arXiv.1903.03792</a>
  bibtex: '@article{Kolb_Savov_2020, title={A Characterization of the Finiteness of
    Perpetual Integrals of Levy Processes}, volume={26}, DOI={<a href="https://doi.org/10.48550/arXiv.1903.03792">https://doi.org/10.48550/arXiv.1903.03792</a>},
    number={2}, journal={Bernoulli}, publisher={Bernoulli Society for Mathematical
    Statistics and Probability}, author={Kolb, Martin and Savov, Mladen}, year={2020},
    pages={1453–1472} }'
  chicago: 'Kolb, Martin, and Mladen Savov. “A Characterization of the Finiteness
    of Perpetual Integrals of Levy Processes.” <i>Bernoulli</i> 26, no. 2 (2020):
    1453–72. <a href="https://doi.org/10.48550/arXiv.1903.03792">https://doi.org/10.48550/arXiv.1903.03792</a>.'
  ieee: 'M. Kolb and M. Savov, “A Characterization of the Finiteness of Perpetual
    Integrals of Levy Processes,” <i>Bernoulli</i>, vol. 26, no. 2, pp. 1453–1472,
    2020, doi: <a href="https://doi.org/10.48550/arXiv.1903.03792">https://doi.org/10.48550/arXiv.1903.03792</a>.'
  mla: Kolb, Martin, and Mladen Savov. “A Characterization of the Finiteness of Perpetual
    Integrals of Levy Processes.” <i>Bernoulli</i>, vol. 26, no. 2, Bernoulli Society
    for Mathematical Statistics and Probability, 2020, pp. 1453–72, doi:<a href="https://doi.org/10.48550/arXiv.1903.03792">https://doi.org/10.48550/arXiv.1903.03792</a>.
  short: M. Kolb, M. Savov, Bernoulli 26 (2020) 1453–1472.
date_created: 2022-09-08T06:36:37Z
date_updated: 2022-09-08T06:48:40Z
department:
- _id: '96'
doi: https://doi.org/10.48550/arXiv.1903.03792
intvolume: '        26'
issue: '2'
keyword:
- L ́evy processes
- Perpetual integrals
- Potential measures
language:
- iso: eng
page: 1453-1472
publication: Bernoulli
publication_status: published
publisher: Bernoulli Society for Mathematical Statistics and Probability
status: public
title: A Characterization of the Finiteness of Perpetual Integrals of Levy Processes
type: journal_article
user_id: '85821'
volume: 26
year: '2020'
...