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Dislocation evolution in titanium during surface severe plastic deformation |
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| Authors: | Ming Wen Gang Liu Wei-ming Guan |
| Affiliation: | a Kunming Institute of Precious Metals, Kunming, 650106, People's Republic of China b Shenyang National Laboratory for Materials Science, Institute of Metals Research, Chinese Academy of Sciences, Shenyang, 110016, People's Republic of China c Research Institute, Northeastern University, Shenyang, Liaoning, 110004, People's Republic of China d School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, People's Republic of China e Mechanical Engineering Department, The Hong Kong Polytechnic University, Hong Kong, China |
| Abstract: | Surface mechanical attrition treatment (SMAT) is an innovative technique which can produce nanocrystalline (nc) layers of several tens of micrometers thickness on surfaces of metallic materials. In this work, the grade structures of commercially pure titanium (CP Ti) processed by SMAT was studied intensively, and the microstructure observations indicated that the dislocation evolution could be separated into three steps: (1) formation of dislocation tangles; (2) formation of dislocation bands; and (3) dynamic recrystallization of dislocation bands until the formation of nc Ti. |
| Keywords: | 61.46.Hk 81.05.Bx |
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