Microstructure and mechanical properties of CrFeCoNiB0.05Tix high-entropy alloy

doi:10.13251/j.issn.0254-6051.2022.08.009

Abstract

Abstract: In order to study the effect of Ti content on microstructure and mechanical properties of high-entropy alloys, the CrFeCoNiB_0.05Ti_x(x=0.2,0.4,0.6,0.8,1.0) high-entropy alloy was prepared by mechanical alloying and spark-plasma sintering, then the microstructure was analyzed by X-ray diffraction, scanning electron microscope observation, energy spectrum analysis, and the properties were analyzed by Vickers hardness test and compressive strength test. The results show that the CrFeCoNiB_0.05Ti_x(x=0.2,0.4,0.6,0.8,1.0) high-entropy alloy is composed of FCC, BCC and α phases. Moreover, when x is 1.0, the alloy changes from BCC structure to HCP structure, and a new Laves phase is precipitated, the alloy has the highest hardness of 416.54 HV0.2. When x is 0.8, the alloy reaches the maximum compressive strength of 586.3 MPa.

Key words: high-entropy alloy, spark-plasma sintering, mechanical properties, microstructure

CLC Number:

TG113

Jiang Yue, Zhu Baixiang, Li Xiuming, Tan Yaping. Microstructure and mechanical properties of CrFeCoNiB_0.05Ti_x high-entropy alloy[J]. Heat Treatment of Metals, 2022, 47(8): 58-62.

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Microstructure and mechanical properties of CrFeCoNiB_0.05Ti_x high-entropy alloy

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