About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
Presentation Title |
Reduction of Aging Mechanisms in a Polyamide 66 Material for Use in the Laser-based Powder Bed Fusion Process |
Author(s) |
Joseph Hofmann, Andreas Wegner, Katrin Wudy |
On-Site Speaker (Planned) |
Joseph Hofmann |
Abstract Scope |
In laser-based powder bed fusion, aging mechanisms caused by prolonged thermal exposure affect polymers. Therefore, new material is often blended with used powder to maintain acceptable component properties and save costs. However, this method is limited for high-performance plastics with high processing temperatures (> 200 °C), like PEEK. Filled polyamide 66 compounds with lower processing temperatures, lower service temperatures but comparable mechanical properties represent a promising alternative for aerospace and automotive components. This study examines processed and artificially aged PA66 powder using a vacuum-drying oven to understand the aging mechanisms during processing. An analysis of the thermal and rheological properties of neat PA66 and filled compounds revealed significantly decreased aging effects at lower storage temperatures and oxygen levels. Furthermore, a novel filled and modified PA66 compound was investigated, balancing thermal oxidation and post-condensation effects while maintaining high mechanical properties (tensile strength > 70 MPa) when using 50 % recycled material. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |