Effect of Hot Isostatic Pressing Heating Temperature on Microstructure and Properties of Ti6Al4V Titanium Alloy by Additive Manufacturing
CAO Jianghai1,2, FANG Weiping1,3,*, LUO Bingbing1, ZENG Yangming1, ZHANG Yupeng1, WANG Gang2
1 China-Ukraine Institute of Welding, Guangdong Academy of Sciences, Guangzhou 510650, China; 2 School of Mechanical and Intelligent Manufacturing, Chongqing University of Science and Technology, Chongqing 401331, China; 3 School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China
Abstract: The effects of hot isostatic pressing(HIP) treatment at different temperatures on the microstructure and mechanical properties of electron beam selective melting(EBSM)-fabricated Ti6Al4V components were investigated. The results demonstrate that HIP treatment at 800 ℃ significantly reduces the defects while improving hardness and strength. Specifically, the ultimate tensile strength increases from 826.2 MPa to 850.2 MPa, yield strength rises from 729.1 MPa to 758.5 MPa, and elongation after fracture improves from 10.97% to 11.57%. The Vickers hardness also increases from 306.9HV to 333.1HV. When the HIP temperature is elevated to 920 ℃, the component exhibits an ultimate tensile strength of 834.2 MPa, yield strength of 737.5 MPa, and Vickers hardness of 401.5HV, with elongation after fracture substantially increasing to 14.57%. Microstructural analysis revealed that higher HIP temperatures promote the transformation of Widmanstatten structure to basket-weave morphology, accompanied by a gradual decrease in α-phase content and corresponding increase in β-phase fraction. Additionally, grain growth is observed along with reduced dislocation density and lower proportions of low-angle orientation grain boundaries.
曹江海, 房卫萍, 罗兵兵, 曾扬铭, 张宇鹏, 王刚. 热等静压加热温度对增材制造Ti6Al4V钛合金组织和性能的影响[J]. 材料导报, 2026, 40(6): 25020112-6.
CAO Jianghai, FANG Weiping, LUO Bingbing, ZENG Yangming, ZHANG Yupeng, WANG Gang. Effect of Hot Isostatic Pressing Heating Temperature on Microstructure and Properties of Ti6Al4V Titanium Alloy by Additive Manufacturing. Materials Reports, 2026, 40(6): 25020112-6.
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2026, Vol. 40 
