conference paper yes Sven Helge Klippstein author 71545 Hans-Joachim Schmid author 464000-0001-8590-1921 150 department 624 department 219 department 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. 2022 eng Selective SasersinteringProcess MonitoringPowder Spread 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. 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. @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} } 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>. S. H. Klippstein and H.-J. Schmid, “Powder Spread Flaws in Polymer Laser Sintering and its Influences on Mechanical Performance,” 2022. S.H. Klippstein, H.-J. Schmid, in: Proceedings of the 33nd Annual International Solid Freeform Fabrication Symposium, Austin, TX, USA, 2022. 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. 333562022-09-13T16:42:10Z2023-05-04T08:31:49Z