About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Effect of Powder Characteristics on Fatigue Performance 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 |
The characteristics of powder feedstock used during laser powder bed fusion (L-PBF) can influence the mechanical performance of the fabricated parts. The rheological properties and the internal porosity of the powder particles can affect the defect content and thus, impact the fatigue performance. Two batches of 17-4 precipitation hardening stainless steel powders supplied by two different vendors are used to fabricate the L-PBF specimens and investigate the effect of powder characteristics on porosity and fatigue behavior. It is observed that the powder batch with wider particle size distribution, higher compressibility, and internal porosity results in a higher defect content in the fabricated specimens. In addition, higher cohesion between the powder particles also contributed to the higher defect content due to the formation of agglomerates leading to a poor packing state. Higher defect content in the machined specimens can result in an inferior fatigue lives with more scatter. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |