|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Ultrafine-grained and Heterostructured Materials (UFGH XII)
||Achieving Large Super-elasticity through Changing Relative Easiness of Deformation Modes in Ti-Nb-Mo Alloy by Ultra-grain Refinement
||Bingjie Zhang, Mingda Huang, Chong Yan, Wenqi Mao, Wu Gong, Ruixiao Zheng, Yu Bai, Dong Wang, Qiaoyan Sun, Yunzhi Wang, Nobuhiro Tsuji
|On-Site Speaker (Planned)
Large super-elasticity approaching its theoretically expected value was achieved in Ti-13.3Nb-4.6Mo alloy having an ultrafine-grained beta-phase. In-situ synchrotron radiation X-ray diffraction analysis revealed that the dominant yielding mechanism changed from dislocation slip to martensitic transformation by decreasing the beta-grain size down to sub-micrometer. Different grain size dependence of the critical stress to initiate dislocation slip and martensitic transformation, which was reflected by the transition of yielding behavior, was considered to be the main reason for the large super-elasticity in the ultrafine-grained specimen.
||Titanium, Phase Transformations, Mechanical Properties