| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
High and Very High Cycle Fatigue Behavior of Additively Manufactured 17-4 PH Stainless Steel: The Effect of Shielding Gas |
| Author(s) |
Pooriya Nezhadfar, Jade Welsh, Jutima Simsiriwong, Shuai Shao, Nima Shamsaei |
| On-Site Speaker (Planned) |
Pooriya Nezhadfar |
| Abstract Scope |
Shielding gas is one of the process parameters that can affect the heat transfer and solidification during the layer-wise additive manufacturing (AM) processes, which may be influential in altering the microstructure and porosity of the fabricated part. This study deals with the effect of shielding gas type (N2 vs. Ar) on the microstructure and mechanical properties of 17-4 PH stainless steel (SS) fabricated through laser beam powder bed fusion (LB-PBF) AM process. Fatigue resistance of the material is evaluated in the high and very high cycle regimes. Due to the microstructural differences, particularly refined micro-/defect-structure, fatigue performance of N2-shielded specimens is expected to be superior to that of Ar-shielded counterparts in the high cycle regime. The effect of cyclic strain rate on the fatigue behavior of specimens manufactured under N2 and Ar atmospheres, with different microstructure and porosity levels, will be also discussed. |
| Proceedings Inclusion? |
Planned: |