| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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| Symposium
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2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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| Presentation Title |
Fatigue Strength Prediction of Additively Manufactured 17-4 PH Stainless Steel Specimens with Various Geometries |
| Author(s) |
Jade Welsh, Indrajit Nandi, Jutima Simsiriwong, Shuai Shao, Nima Shamsaei |
| On-Site Speaker (Planned) |
Jade Welsh |
| Abstract Scope |
It is known that the shape and size of additively manufactured parts can significantly affect their volumetric defect population/structure, which subsequently influences their fatigue resistance. In this study, a defect-based model developed on a fracture mechanics concept is utilized to predict the fatigue strength of 17-4 precipitation-hardened (PH) stainless steel (SS), manufactured via laser-powder bed fusion (L-PBF). Uniaxial fully-reversed fatigue experiments are conducted on L-PBF and wrought 17-4 PH SS with various specimen geometries using conventional and ultrasonic fatigue test setups. Based on the fractography analysis, crack initiation mechanisms, as well as the size and location of the volumetric defects responsible for crack initiation are obtained, to explain the fatigue behavior and utilize in the defect-based fatigue model. The applicability of the utilized model is validated by comparing the predicted fatigue strengths with the ones obtained experimentally.
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| Proceedings Inclusion? |
Definite: Post-meeting proceedings |