Research on heat treatment properties of TC4 titanium alloy based on electron beam additive manufacturing

Huang Xingguang; Sun Baofu; Sun Guohui; Zhang Jianfei

doi:10.7513/j.issn.1004-7638.2021.06.014

Volume 42 Issue 6

Dec. 2021

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Huang Xingguang, Sun Baofu, Sun Guohui, Zhang Jianfei. Research on heat treatment properties of TC4 titanium alloy based on electron beam additive manufacturing[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 102-108. doi: 10.7513/j.issn.1004-7638.2021.06.014

Citation:

Huang Xingguang, Sun Baofu, Sun Guohui, Zhang Jianfei. Research on heat treatment properties of TC4 titanium alloy based on electron beam additive manufacturing[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 102-108. doi: 10.7513/j.issn.1004-7638.2021.06.014

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Research on heat treatment properties of TC4 titanium alloy based on electron beam additive manufacturing

doi: 10.7513/j.issn.1004-7638.2021.06.014

1.
College of Mechanical and Control Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China
2.
Captial Spaceflight Machinery Company Co., Ltd., Beijing 100071, China
3.
Guilin Shida Technology Co., Ltd., Guilin 541004, Guangxi, China

Received Date: 2021-07-07
Publish Date: 2021-12-31

Abstract

Abstract

In this paper, heat treatment was carried out for TC4 titanium alloy specimens prepared by electron beam selective melting. The microstructure characteristics of the TC4 titanium alloy specimens after heat treatment were studied by using scanning electron microscope and metallographic microscope. The mechanical properties of the TC4 titanium alloy specimens were investigated. The influence of heat treatment process on the specimen was revealed. The results show that the tensile strength of the specimens increased via heat treatment below phase transition temperature with the air cooling or furnace cooling, while the tensile strength of the specimens decreased by heat treatment at temperatures higher than the phase transition point. By observing the microstructure and analyzing the tensile fracture, it is found that the tensile strength of TC4 titanium alloy specimens decreased via heat treatment at 950 ℃ and 1 000 ℃, due to the transformation of β phase into Widmanstatten structure. However, at 850 ℃ of heat treatment temperature, the properties of the TC4 titanium alloy specimens were stable, because the microstructure inside was still equiaxed before reaching the phase transition point. Those results suggest the TC4 titanium alloy manufactured by EBSM have good mechanical properties by an appropriate heat treatment process.
- Ti-6Al-4V,
- EBSM,
- heat-treatment,
- mechanical property

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References(9)

References

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