About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advancing the Frontier of Powder Materials Processing and Sintering: A MPMD/EPD Symposium in Honor of Eugene Olevsky
|
| Presentation Title |
Mechanical Property Reliability for Polyamide Processed using Powder Bed Fusion |
| Author(s) |
David L. Bourell, David K Leigh |
| On-Site Speaker (Planned) |
David L. Bourell |
| Abstract Scope |
One of the historic obstacles to widespread application of PBF polymers in structural applications is the reliability, consistency, and repeatability of part service properties between builds. This will be discussed in the context of data from a service bureau for which over 100,000 ASTM D638 tension tests have been performed on commercial builds of AM laser sintered polyamide. The usual method for relating process parameters to part properties, the macro-volume energy density, is not adequate when considering part ductility. A solution approach for improving part reliability will be presented based on thermal modeling during the build process. Results show that part service properties arise from an accumulation of time above the crystallization temperature. Therefore, the cooling characteristics of the parts as dictated by their location in the build volume are important variables affecting part quality. A model is presented which has predictive ability for acceptable part ductility. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Powder Materials, Polymers |