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宋静雯,谭长生,孙巧艳,肖林,赵永庆,孙军.等温淬火对TC21钛合金微观组织和力学性能的影响[J].稀有金属材料与工程(英文),2019,48(4):1260~1266.[Jingwen Song,Changsheng Tan,Qiaoyan Sun,Lin Xiao,Yongqing Zhao and Jun Sun.Effect of the step-quenching on microstructures and mechanical properties of TC21 titanium alloy[J].Rare Metal Materials and Engineering,2019,48(4):1260~1266.]
Effect of the step-quenching on microstructures and mechanical properties of TC21 titanium alloy
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Received:September 09, 2017  Revised:November 24, 2017
DOI:
Key words: Secondary α lath  Step-quenching  Microstructures  Mechanical properties
Foundation item:国家科学自然基金(51671158, 51471136, 51471129, 51621063),973计划课题(2014CB644003)和引智计划(B06025)
Author NameAffiliation
Jingwen Song,Changsheng Tan,Qiaoyan Sun,Lin Xiao,Yongqing Zhao and Jun Sun  
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Abstract:
      In this paper, the microstructures which were obtained through step-quenching and the mechanical properties of TC21titanium alloy were investigated systematically. The samples were solution treated at 900℃ for 0.5h, and then 9 sets of step-quenching experiments with temperature from 600℃ to 60℃ were carried out. The microstructure characteristics, hardness and tensile mechanical properties was measured and compared with different microstructures. The results show that the width of secondary α lath gradually decreased from 600℃ to 400℃, and nearly remained constant from 400℃ to 60℃. The variation of the macro-Vickers hardness is the same as that of βtrans matrix. The elongation and the reduction of area slowly increases with increasing the quenching temperature. The Vickers hardness, yield strength and tensile strength increase with decreasing the width of secondary α lath. The microstructure with a good combination of strength and ductility was obtained through the step-quenching at 300 to 400℃.