| About this Abstract |
| Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
| Symposium
|
Materials
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| Presentation Title |
Generation and Characterization of Parameter- and Process-induced Defects in Powder Bed Fusion Additive Manufacturing, and Impact of Mechanical Properties Thereof |
| Author(s) |
Abdalla R Nassar, Brett A. Diehl, David J Corbin, Anil Chaudhary, Jared J Blecher, Ryan Overdorff, Peter T Lee |
| On-Site Speaker (Planned) |
Abdalla R Nassar |
| Abstract Scope |
Prevention, in-situ sensing, and post-build detection of defects in powder bed fusion additive manufacturing (PBFAM) are of significant interest to both researchers and end-users of the technology. The goal of much of this work is to quickly detect, then quantify the impact of defect characteristics on mechanical properties as part of a rapid certification/qualification strategies for PBFAM. Unfortunately, such efforts are impeded by a limited ability to controllably reproduce flaws, representative of natural ones. Here, controls methods are developed and implemented to produce lack of fusion, keyholing-induced porosity, and entrained spatter in Ti–6Al–4V samples produced using otherwise optimized (default) processing parameters. The developed methods do not rely on CAD or build file modifications, but rather in-situ parameter perturbations. The size, distribution, and morphology of defects are confirmed with high-resolution X-ray computed tomography, demonstrating the ability to produce defects of known size and morphology at known locations. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |