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罗文忠,孙峰,赵小花,张晓园,雷锦文.固溶处理对Ti60合金组织及拉伸性能的影响[J].稀有金属材料与工程(英文),2017,46(12):3967~3971.[Wenzhong Luo,Feng Sun,Xiaohua Zhao,Xiaoyuan Zhang and Jinwen Lei.Influence of solution treatment on the microstructure and mechanical property of Ti60 alloy[J].Rare Metal Materials and Engineering,2017,46(12):3967~3971.]
Influence of solution treatment on the microstructure and mechanical property of Ti60 alloy
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Received:October 30, 2015  Revised:September 02, 2016
Key words: near α titanium alloy  solution treatment  martensite  primary α phase  tensile property
Foundation item:国家国际科技合作专项(2013DFR50090)
Author NameAffiliation
Wenzhong Luo,Feng Sun,Xiaohua Zhao,Xiaoyuan Zhang and Jinwen Lei  
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      Both of the α′ and α+α′ martensite microstructures of Ti60 alloy as high temperature titanium alloy used up to 600°C can be obtained by solution treatments at different temperatures. The morphologies of the two microsturctures are compared as well as the tensile properties at room temperature, 300°C and 600°C. The results indicate that all the β phase transforms to α′ phase during quenching, and only about 10% primary α phase retains in the α+α′ microstructure. The little decrease of strength and great increase of ductility can be attributed to the partial solution of primary α phase. The size of dimple observed on the fracture of specimens with α+α′ microstructure at room temperature is larger than that with α′ microstructure. Because the retained primary α phase dedicates to the refinement of β grains, leading to the disturbance of expansion of cracks by increasing the length of grain boundaries. The influence of the primary α phase on the tensile properties decreases with the increasing of the tensile temperature.