[C1-O1] Slot 01

[C1-O1-03 (Symposium Keynote)] Unique transition of yielding behavior and deformation mechanism in ultrafine grained high-Mn austenitic steel

*Yu Bai^1,2,3, Hiroki Kitamura², Si Gao², Yanzhong Tian⁴, Nokeun Park^5,3, Myeong-heom Park^2,3, Hiroki Adachi⁶, Akinobu Shibata^7,2,3, Masugu Sato⁸, Mitsuhiro Murayama^9,10, Nobuhiro Tsuji^2,3 (1. School of Materials Science and Engineering, Dalian University of Technology (China), 2. Department of Materials Science and Engineering, Kyoto University (Japan), 3. Elements Strategy Initiative for Structural Materials (ESISM), Kyoto University (Japan), 4. School of Materials Science and Engineering, Northeastern University (China), 5. Department of Materials Science and Engineering, Yeungnam University (Korea), 6. Graduate School of Engineering, University of Hyogo (Japan), 7. National Institute for Materials Science (NIMS) (Japan), 8. Japan Synchrotron Radiation Research Institute (JARSI) (Japan), 9. Institute for Materials Chemistry and Engineering, Kyusyu University (Japan), 10. Department of Materials Science and Engineering, Verginia Tech (United States of America))

Keywords: ultrafine grains, yield-drop phenomenon, deformation twin nucleation