---
_id: '33356'
abstract:
- lang: eng
  text: By monitoring the recoating process within polymer laser sintering production,
    it was shown that multiple powder-spread-flaws can be detected. Those groove-like
    flaws are expected to be the result of agglomerates jamming between the recoater
    and the last powder layer. This work is analyzing the interaction between powder-spread-flaws
    and part properties, showing the influence of the recoating process on the performance
    of laser sintering parts. Therefore, artificial powder-spread-flaws are applied
    to the build jobs of tensile test specimens which are measured and analyzed regarding
    the elongation at break, strength and fracture position. For the characteristics
    of the flaws, the artificial grooves are varied in depth and width. Furthermore,
    the position of the flaw is changed form mid part to close to surface areas. It
    was shown, that several flaws are visible at the part surface, resulting in stress
    concentration and reduced performance. But there are as well parts with flaw-layers,
    which are not visible after the build process on the part. Those parts can have
    significantly reduced mechanical properties as well.
author:
- first_name: Sven Helge
  full_name: Klippstein, Sven Helge
  id: '71545'
  last_name: Klippstein
- first_name: Hans-Joachim
  full_name: Schmid, Hans-Joachim
  id: '464'
  last_name: Schmid
  orcid: 000-0001-8590-1921
citation:
  ama: 'Klippstein SH, Schmid H-J. Powder Spread Flaws in Polymer Laser Sintering
    and its Influences on Mechanical Performance. In: <i>Proceedings of the 33nd Annual
    International Solid Freeform Fabrication Symposium</i>. ; 2022.'
  apa: Klippstein, S. H., &#38; Schmid, H.-J. (2022). Powder Spread Flaws in Polymer
    Laser Sintering and its Influences on Mechanical Performance. <i>Proceedings of
    the 33nd Annual International Solid Freeform Fabrication Symposium</i>.
  bibtex: '@inproceedings{Klippstein_Schmid_2022, place={Austin, TX, USA}, title={Powder
    Spread Flaws in Polymer Laser Sintering and its Influences on Mechanical Performance},
    booktitle={Proceedings of the 33nd Annual International Solid Freeform Fabrication
    Symposium}, author={Klippstein, Sven Helge and Schmid, Hans-Joachim}, year={2022}
    }'
  chicago: Klippstein, Sven Helge, and Hans-Joachim Schmid. “Powder Spread Flaws in
    Polymer Laser Sintering and Its Influences on Mechanical Performance.” In <i>Proceedings
    of the 33nd Annual International Solid Freeform Fabrication Symposium</i>. Austin,
    TX, USA, 2022.
  ieee: S. H. Klippstein and H.-J. Schmid, “Powder Spread Flaws in Polymer Laser Sintering
    and its Influences on Mechanical Performance,” 2022.
  mla: Klippstein, Sven Helge, and Hans-Joachim Schmid. “Powder Spread Flaws in Polymer
    Laser Sintering and Its Influences on Mechanical Performance.” <i>Proceedings
    of the 33nd Annual International Solid Freeform Fabrication Symposium</i>, 2022.
  short: 'S.H. Klippstein, H.-J. Schmid, in: Proceedings of the 33nd Annual International
    Solid Freeform Fabrication Symposium, Austin, TX, USA, 2022.'
date_created: 2022-09-13T16:42:10Z
date_updated: 2023-05-04T08:31:49Z
department:
- _id: '150'
- _id: '624'
- _id: '219'
keyword:
- Selective Sasersintering
- Process Monitoring
- Powder Spread
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://utw10945.utweb.utexas.edu/sites/default/files/2022/Powder%20Spread%20Flaws%20in%20Polymer%20Laser%20Sintering%20and.pdf
oa: '1'
place: Austin, TX, USA
publication: Proceedings of the 33nd Annual International Solid Freeform Fabrication
  Symposium
quality_controlled: '1'
status: public
title: Powder Spread Flaws in Polymer Laser Sintering and its Influences on Mechanical
  Performance
type: conference
user_id: '464'
year: '2022'
...