About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing Fatigue and Fracture: Effects of Surface Roughness, Residual Stress, and Environment
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Presentation Title |
Residual Stress Induced Fracture of As-Fabricated Laser Powder Bed Fusion Parts |
Author(s) |
Albert To, Hai Tran |
On-Site Speaker (Planned) |
Albert To |
Abstract Scope |
Residual stress is believed to be the main cause of cracking of a part during the build process of laser powder bed fusion. A systematic investigation on the residual stress-induced cracking issue is presented. Simulations based on the modified inherent strain method and experiments were used to investigate the residual stress and fracture in Inconel 718 parts manufactured by laser powder bed fusion (L-PBF). The results show that the modified inherent strain method can accurately predict the residual stress, and together with the J-integral approach, fracture can also be predicted with good accuracy. This model is also being applied to simulate crack delamination at the solid/support interface in additively manufactured parts. The results of this work may shed light on the cracking issue in components processed by laser powder bed fusion (L-PBF). |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, Modeling and Simulation |