退火温度对包套挤压FeCoCrNiMo<sub>0.1</sub>高熵合金组织与摩擦性能的影响

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Abstract A high-entropy alloy bar was prepared by canned extruding using gas-atomization FeCoNiMo_0.1 as raw materials. The extruded bar was annealed at 350, 500 and 650 ℃ for 4 h, respectively. The microstructure and phase composition of the samples were analyzed using scanning electron microscopy (SEM) and X-Ray diffraction (XRD). In addition, the hardness and abrasive resistance of the samples were also tested. The results show that the gas-atomized FeCoCrNiMo_0.1powder has a high sphericity, the extruded and annealed samples are single-phase FCC structure, the hardness of the samples annealed at different temperatures have no obvious change. The change of microstructure is mainly reflected in the grain size and the type and number of the twins. After annealing at 350 ℃, the number of deformation twins decreases, the wear resistance and compression pressure of the alloy decrease slightly, the grain adhesion appeares at the friction interface and the friction coefficient of the alloy decreases. After annealing at 500 ℃ and 650 ℃, the number of twins increases, the wear resistance and yield strength of the alloy increase, the wear mechanism is mainly adhesive wear, and the friction coefficient increases.

Key words： high-entropy alloy gas atomization powder annealing compression yield friction and wear

Received: 28 February 2018 Published: 12 July 2019

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TG156.2

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	Articles by authors
	TIAN Yanwen
	REN Junye
	HUANG Qianli
	LI Qingxiang
	ZHOU Shaoqiang
	LIU Yin
	WU Hong

Cite this article:

TIAN Yanwen,REN Junye,HUANG Qianli, et al. Effects of annealing temperature on the microstructure and friction properties of FeCoCrNiMo_0.1 high-entropy alloy fabricated by canned extruding[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(5): 482-487.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I5/482

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