About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Ultrafine-grained and Heterostructured Materials (UFGH XI)
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Presentation Title |
N-28: Enhanced Mechanical Properties of Nano/Ultrafine-grained Structure Formed by Martensite Reversion in 18Cr-8Ni Austenitic Stainless Steel |
Author(s) |
Jia Liu, Xiangtao Deng, Zhaodong Wang |
On-Site Speaker (Planned) |
Jia Liu |
Abstract Scope |
The effect of grain size on high cycle fatigue behavior under axial force in 18Cr-8Ni austenitic stainless steel was investigated. By means of phase reversion process, nano/ultrafine-grained and coarse-grained structures were formed on austenitic stainless steel. The mean grain sizes are 400 nm and 12 μm, and refine the grain size can improve the fatigue strength effectively. Microstructure observations using TEM reveal that, high density dislocations, poorly developed dislocation cell-like structures and stacking faults were formed in CG steel after fatigue. In contrast, cyclic deformation microstructures of NG/UFG sample were different from that of CG steel. Dislocations in nano/ultrafine grains and dislocation cell and dislocation wall structures in deformed austenite grains were observed in NG/UFG sample. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |