| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
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| Symposium
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Additive Manufacturing: Length-Scale Phenomena in Mechanical Response
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| Presentation Title |
Microstructures and Deformation Mechanisms in Additively Manufactured 316L Stainless Steels |
| Author(s) |
Thomas Voisin, Marissa Linne, Jean-Baptiste Forien, Nicolas Bertin, Tatu Pinomaa, Anssi Laukkanen, Kirubel Teferra, Margaret Wu, Sylvie Aubry, Y. Morris Wang, Nathan Barton |
| On-Site Speaker (Planned) |
Thomas Voisin |
| Abstract Scope |
Rapid thermomechanical cycles during laser powder-bed-fusion (L-PBF) additive manufacturing (AM) gives as-fabricated metals none-equilibrium microstructures, most often resulting in improved properties. In L-PBF 316L stainless steels (316LSS), this means breaking off the strength/ductility tradeoff. So-called cellular structures have explained the significant increase in strength. However, these structures are complex, with high density dislocation cells containing precipitates and trapped solutes. We will present our recent investigations of the plasticity of L-PBF 316LSS, first introducing the multi-scale microstructural features present in the as-fabricated and annealed materials. The second part will focus on how we test, characterize, and simulate the plastic deformation of L-PBF 316LSS materials, with and without post-process heat treatment. We use electron microscopy (SEM and TEM), in-situ high energy X-ray diffraction (HEXRD), cellular automata, crystal plasticity simulations, and virtual HEXRD.
This work was performed under the auspices of the U.S. Department of Energy by LLNL under Contract DE-AC52-07NA27344. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Modeling and Simulation, Characterization |