About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Heterostructured and Gradient Materials (HGM V): New Mechanistic Discoveries Enabling Superior Properties
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Presentation Title |
Effect of Grain Refinement on Plastic Deformation and Fracture in a Si-added High-Mn Austenitic Steel |
Author(s) |
Sukyoung Hwang, Yu Bai, Si Gao, Akinobu Shibata, Nobuhiro Tsuji |
On-Site Speaker (Planned) |
Sukyoung Hwang |
Abstract Scope |
High-Mn austenitic steels are well known for their outstanding mechanical properties combining high strength and large ductility, which are believed to result from the formation of mechanical twins during plastic deformation. Meanwhile, the low yield strength of high-Mn austenitic steels has always been an issue for practical applications. Grain refinement is an effective way to improve the low yield strength of polycrystalline material according to the Hall-Petch relationship.
In the present study, 22Mn-0.6C-3Si (mass %) steels with various mean grain sizes down to ultrafine grained (UFG) region were successfully fabricated by high pressure torsion (HPT) and subsequent annealing. The present material showed a unique tensile behavior that the strength and ductility simultaneously increased with the grain refinement. The effect of grain refinement on the mechanical properties are discussed in relation to the deformation microstructures, and detailed results are shown and discussed in the presentation. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, |