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)
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Presentation Title |
Defect-sensitive Fatigue Modeling for L-PBF Parts in Very High Cycle Regime
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Author(s) |
Indrajit Nandi, Jade Welsh, Jutima Simsiriwong, Shuai Shao, Nima Shamsaei |
On-Site Speaker (Planned) |
Indrajit Nandi |
Abstract Scope |
Murakami's approach has been shown to work well in high cycle fatigue regime to related the fatigue strength to the critical defect size and location in additively manufactured (AM) metallic materials. However, the applicability of this model has not yet been fully examined for AM materials in the very high cycle fatigue (VHCF) regime. Therefore, this study investigates the possibility of relating the volumetric defect features to the fatigue strength of 17-4 precipitation hardened (PH) stainless steel (SS) manufactured via laser-powder bed fusion (L-PBF) additive manufacturing technology. The 17-4 PH SS specimens are manufactured using an EOS M290 L-PBF system, heat treated, machined and polished, and tested in VHCF regime using an ultrasonic fatigue testing system. Careful fractography has been also performed on all fractured specimens to determine the volumetric defects responsible for the crack initiation. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |