| METALS AND METAL MATRIX COMPOSITES |
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| Grain Growth Kinetics of Fine Grained TA2 Commercial Pure Titanium by Friction Stir Processing |
| CHEN Chenhui1,2, JIANG Luyao1,2, LIU Chenglong1,2, HUANG Weijiu1,2, GUO Yongyi1,2, XU Qiaoliang1,2
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1 College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054
2 Chongqing Key Laboratory of Mold Technology, Chongqing University of Technology, Chongqing 400054 |
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Abstract Fine grained TA2 commercial pure Ti was prepared by friction stir processing with 180 r/min and 25 mm/min. The average grain size of the processed TA2 alloy was 2 μm. Thermal stability and grain growth kinetics of fine grained TA2 alloy were studied. SEM images and EBSD results were used to analyze the microstructure and texture after annealing. The results showed that the texture of friction stir processed TA2 alloy was stable and c-axes were approximately parallel to processing direction after annealing treatment. Some grains preferentially grew up when the sample underwent heat treatment at 550 ℃. When the temperature reached 600 ℃, fine grains grew fast. When annealed between 500 ℃ to 600 ℃, the grain growth exponent and the activation energy were 3 and 328.5 kJ/mol, respectively. The microstructure and texture of fine grained TA2 prepared by friction stir processing could remain stable at 500 ℃.
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Published: 28 April 2019
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| Fund:This work was financially supported by the Chongqing Research Program of Basic Research and Frontier Technology (cstc2015jcyjBX0048), Social Underta-kings and People's Livelihood Guarantee Scientific and Technological Innovation Program of Chongqing (cstc2017shmsA130047), National “ten thousand plan” Scientific and Technological Innovation Leading Talent Project. |
| About author:: Chenhui Chen, master, studying at College of Mate-rials Science and Engineering, Chongqing University of Technology since September 2016. His research focus on material reinforcement, failure and protection.; Chenglong Liu received his Doctor's degree in material science from Dalian University of Technology in January 2006. |
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2019, Vol. 33 
