About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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Presentation Title |
The Effect of Heat Treatment on Full-field Damage Evolution in Laser Powder Bed Fusion-manufactured 316L Stainless Steel |
Author(s) |
Marissa Linne, Margaret Wu, Tatu Pinomaa, Anssi Laukkanen, Nathan Barton, Thomas Voisin |
On-Site Speaker (Planned) |
Marissa Linne |
Abstract Scope |
Additively manufactured 316L stainless steels produced by laser powder bed fusion (L-PBF) have favorable high strength and high ductility compared to conventional steels, due to a hierarchically heterogeneous microstructure, which enables progressive work hardening. Modeling this complex microstructural behavior requires statistical deformation data. To address this, in the presented work, strain evolution of L-PBF 316L stainless steel was investigated with microscale resolution over mm-scale fields of view using electron backscatter diffraction and SEM-enabled digital image correlation. In-SEM tensile tests were conducted on as-printed and heat-treated 316L samples. Heat treatment and dislocation structure removal affects the relative contributions of twinning vs. slip deformation mechanisms. The results of this study help inform models to accurately simulate the differences in hardening behavior observed between as-built and heat-treated L-PBF-manufactured 316L stainless steel. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, |