About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Powder Spread Flaws in Polymer Laser Sintering and its Influences on Mechanical Performance |
Author(s) |
Helge Klippstein, Hans-Joachim Schmid |
On-Site Speaker (Planned) |
Helge Klippstein |
Abstract Scope |
By monitoring the recoating process within polymer laser sintering production, it was shown that several 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. Analyzing the interaction between powder-spread-flaws and part properties shows the influence of the recoating process on the performance of laser sintering part. Therefore, artificial powder-spread-flaws are applied to the build jobs of tensile test specimens and measured. For the characteristic of the flaws, the artificial grooves are variated in depth and width. Furthermore, the position of the flaw is changed form mid part to close to surface areas. By correlating the flaws with the mechanical part properties, the critical flaw size and position was determined, which enables the recently developed powder spread monitoring system to deliver better information and alerts on critical recoating failures. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |