|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Nano/Micro-mechanics and Length-scale Phenomena
||The effect of heat treatment on full-field damage evolution in laser powder bed fusion-manufactured 316L stainless steel
||Marissa Linne, Margaret Wu, Tatu Pinomaa, Anssi Laukkanen, Nathan Barton, Thomas Voisin
|On-Site Speaker (Planned)
Additively manufactured 316L stainless steels produced by laser powder bed fusion (L-PBF) have favorable high strength and high ductility compared to conventional steels. This is 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. Strain localization behaviors were statistically compared to grain properties and microstructural features. The results of this study help inform predictive deformation modeling and identify desirable microstructural characteristics for mitigating damage initiation in L-PBF-manufactured components. This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
||Additive Manufacturing, Mechanical Properties, Characterization