---
_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'
...