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 |
Improving the Low Cycle Fatigue Life of Additively Manufactured High-manganese Steels by Tailoring the Crystallographic Textures |
Author(s) |
Efthymios Polatidis, Miroslav Smid, Jan Capek, Michal Jambor, Daniel Koutny, Christian Haase |
On-Site Speaker (Planned) |
Jan Capek |
Abstract Scope |
By carefully selecting the processing parameters of Laser Powder Bed Fusion (LPBF) it is possible to engineer the dominant crystallographic texture with respect to the loading axis. Consequently, the transformation-induced plasticity (TRIP) effect in metastable steels, which is orientation-dependent, can be hindered or enhanced. The present study focuses on high-manganese steels processed by LPBF with <001>, < 011>, <111> and random crystallographic textures along the loading direction, subjected to symmetrical cyclic loading. The results show significant differences in the cyclic hardening, hysteresis loop asymmetry and mean stresses. In order to follow the TRIP effect, in-situ neutron diffraction under low cycle fatigue tests were carried out. In combination with comprehensive microstructural characterization by electron microscopy, we were able to identify distinct differences in the deformation behavior between the different textures. It is concluded that texture manipulation is a promising route for achieving prolonged fatigue life and superior hardening behavior in metastable austenitic steels. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Iron and Steel, Phase Transformations |