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Effect of Pre-deformation on the Aging Behavior and Mechanical Properties of Ti-6Al-4V Alloy
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1.School of Materials Science and Engineering,Southwest Petroleum University;2.Sichuan,China;3.College of Materials and Fujian Provincial Key Laboratory of Materials Genome,Xiamen University;4.Fujian,China;5.Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology;6.Guangxi,China

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This work was supported by the open fund of Fujian Provincial Key Laboratory of Materials Genome (Xiamen University), and Guangxi Key Laboratory of Information Materials (Guilin University of Electronic Technology), P.R. China, and Scientific Research Foundation and Opening Foundation (X151518KCL23) of Southwest Petroleum University.

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    Abstract:

    The effects of pre-deformation on the aging behavior and mechanical properties of Ti-6Al-4V alloy were studied. Results show that the addition of pre-deformation after the solution process at 940 °C and 955 °C is beneficial in promoting the precipitation of the secondary α phase during the aging of Ti-6Al-4V alloy. When solution temperature was 940 °C, the content of the secondary α phase increased with an increase in pre-deformation amount, its size decreased, and the strength and hardness of the alloy increased monotonously after aging. The tensile strength and hardness of Ti-6Al-4V alloy after aging were evidently higher with pre-deformation than without pre-deformation. Simultaneously, excellent plasticity was maintained. In the case with added pre-deformation, a solution temperature of 955 °C slightly improved the strength and hardness of Ti-6Al-4V alloy compared with a solution temperature of 940 °C. Scanning electron microscopy examinations indicate that the fracture modes of all aged alloys with varying pre-deformation degrees are ductile fracture.

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[Wang Shuliang, Fu Chaozheng, Chen Yuting, Liu Li, Fu Chunyan, Huang Yixiong, Xiang Dinghan, Jiang Xiaosong. Effect of Pre-deformation on the Aging Behavior and Mechanical Properties of Ti-6Al-4V Alloy[J]. Rare Metal Materials and Engineering,2020,49(7):2198~2206.]
DOI:10.12442/j. issn.1002-185X. E20190045

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History
  • Received:March 30,2019
  • Revised:July 01,2019
  • Adopted:July 24,2019
  • Online: August 31,2020
  • Published: