旋锻钨合金的残余应力及动态力学性能

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Abstract 95W-3.5Ni-1.5Fe tungsten alloy was prepared by cold isostatic pressing and vacuum sintering using W, Ni and Fe powders as raw materials. Then, the swaging processing with 15%, 30% and 40% deformation was carried out. Scanning electronic microscope with electron backscattered diffraction, split Hopkinson pressure bar and live-fire target test were used to analyze the microstructure, dynamic mechanical properties and residual stress distribution of 95W-3.5Ni-1.5Fe tungsten alloy. The results show that the W particles in the tungsten alloy deform from a spherical shape to an olive shape after swaging process. The static tensile strength and hardness (HRC) of the 40% deformation tungsten alloy increase from 983 MPa and 28.9 to 1 434 MPa and 46.1 HRC respectively, and the elongation decreases from 11.9% to 4.6%. There are residual compressive stresses in the alloy, which are mainly distributed between tungsten particles and in the Ni-Fe bonding phase. The deformed tungsten alloy has a higher strain rate of 4.9% under the impact strain rate of about 1.2×10³ s^-1, and exhibits “self-sharpening” when penetrating the steel target.

Key words： W-Ni-Fe alloy rotary swaging deformation dynamic mechanical property adiabatic shear microstructure residual stress

Received: 28 February 2021 Published: 10 November 2021

ZTFLH:	TF125.2
	TG146.4

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	Articles by authors
	LIN Zehua
	KANG Jun
	ZHOU Yonggui
	ZHOU Chengshang
	YAN Wenmin

Cite this article:

LIN Zehua,KANG Jun,ZHOU Yonggui, et al. Residual stress and dynamic mechanical properties of swaging deformed tungsten alloy[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(5): 404-411.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I5/404

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