B含量对CrFeCoNiTi<sub>0.6</sub>高熵合金显微组织和性能的影响

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Abstract High entropy alloy is a new kind of solid solution reinforced metal material with good mechanical properties. CrFeCoNiTi_0.6B_x(x=0, 0.025, 0.050, 0.075, 0.100, 0.125) high entropy alloy was successfully prepared by mechanical alloying and spark plasma sintering. The microstructure of the high-entropy alloy was analyzed by X-ray diffraction analysis, scanning electron microscope observation and energy spectrum analysis. The properties of the high-entropy alloy were analyzed by Vickers hardness test and compression strength test. The effects of B content on the microstructure and properties of CrFeCoNiTi_0.6 series high-entropy alloy were also investigated. The results show that CrFeCoNiTi_0.6B high-entropy alloy is composed of FCC structure, simple tetragonal system and boride. When x is 0.125, the alloy structure changes from FCC structure to FCC+BCC structure. The mechanical properties of the alloy are significantly improved because of the addition of B. When x is 0.1, the alloy has the highest hardness of 207.3 HV and compressive strength of 813.9 MPa.

Key words： high-entropy alloy boron microstructure vickers hardness compressive strength

Received: 01 May 2020 Published: 18 January 2021

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	JIANG Yue
	LI Xiuming
	ZHOU Guangtai
	ZHU Baixiang

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JIANG Yue,LI Xiuming,ZHOU Guangtai, et al. Effects of B content on microstructure and properties of CrFeCoNiTi_0.6 high-entropy alloy[J]. Materials Science and Engineering of Powder Metallurgy, 2020, 25(5): 403-409.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2020/V25/I5/403

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