About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Materials
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Presentation Title |
Effect of powder characteristics on tensile properties of additively manufactured 17-4 PH stainless steel |
Author(s) |
Arun Poudel, Arash Soltani-Tehrani, Shuai Shao, Nima Shamsaei |
On-Site Speaker (Planned) |
Arun Poudel |
Abstract Scope |
Laser beam powder bed fusion (LB-PBF) process uses metallic powders as feedstock, whose particle characteristics such as cohesion, compressibility, size distribution, etc., can vary and affect the mechanical performance of the fabricated parts. In this study, two powder batches of 17-4 precipitation hardening (PH) stainless steel (SS) supplied by EOS (Batch 1) and Carpenter Technology (Batch 2) were used to fabricate specimens using identity process parameters to understand the effects of particle characteristics on defect content as well as tensile performance of the LB-PBF specimens. Higher cohesion and compressibility as well as lower sphericity in Batch 2 resulted in specimens with higher porosity levels. During tensile testing, the higher porosity level in Batch 2 yielded lower ductility. In contrast, the microstructure was observed to be less sensitive to particle characteristics because of which the tensile strengths of the specimens were found to be comparable to each other. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |