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Effects of equal channel angular extrusion and aging treatment on R phase transformation behaviors and Ti3Ni4 precipitates of Ni-rich TiNi alloys |
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| Authors: | Xiaoning Zhang Jie SongBin Chen Xiaolin TianYingmin Hao Chaoying Xie |
| Affiliation: | a State Key Lab. of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China b Energy Research Institute, Nanyang Technological University, 70 Nanyang Drive 637457, Singapore c School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive 637457, Singapore d Materials Testing & Analysis Center, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
| Abstract: | Ni-rich TiNi alloys were subjected to the effect of multiple equal channel angular extrusion (ECAE) treatments by BC path at 500 °C. The characteristics of R phase transformation in aging treatment were dissimilar in the appearance and the temperature range to those counterparts induced by ECAE treatments. The fine lens-like shape Ti3Ni4 particles precipitated mainly in the regions of near grain boundaries and on the tangled grain boundaries after ECAE treatments. The effects and mechanisms of aging treatments and ECAE treatments on R phase transformation behaviors and Ti3Ni4 precipitates were investigated and discussed. |
| Keywords: | TiNi Equal channel angular extrusion (ECAE) Aging R-phase transformation Ti3Ni4 |
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