TiH<sub>2</sub>粉末制备钛合金的组织与力学性能

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Abstract Powder metallurgy (PM) Cp-Ti, Ti-6Al-4V and Ti-5Al-2.5Fe alloys were prepared by vacuum sintering process using TiH₂ powder as the raw material. The effects of sintering temperature on microstructure and mechanical tensile properties of sintered products were studied. The results show that the increase of sintering temperature increases the densities and the tensile properties of pure Ti and titanium alloys obviously. After vacuum sintering at 1 200 ℃, the relative density of pure Ti reaches 98.1%, the tensile strength is 501 MPa, and the elongation reaches 11.3%. The relative density of the Ti-6Al-4V alloy is 96.2%, and the tensile strength is 968 MPa, and the elongation is 8.1%. The relative density of the Ti-5Al-2.5Fe alloy is 96.2%, and the tensile strength is 867 MPa, and the elongation is 6.7%. The fracture surface of the three samples sintered at 1 200 ℃ shows a large number of dimples, which exhibits the characteristic of ductile fracture. The strength and elongation of the titanium alloys prepared from TiH₂powder reach the standard level of titanium alloys.

Key words： TiH₂ powder metallurgy titanium alloys sintering temperature microstructure mechanical properties

Received: 26 January 2021 Published: 21 July 2021

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TG146.23

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	CHEN Zoujun
	LIN Zehua
	DUAN Zhongyuan
	ZHU Xianzhi
	ZHOU Chengshang

Cite this article:

CHEN Zoujun,LIN Zehua,DUAN Zhongyuan, et al. Microstructure and mechanical properties of titanium alloys prepared with TiH₂powder[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(3): 243-249.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I3/243

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