Study on Microstructure and Mechanical Properties of CrCuFeNiV Multi Principal Element Alloy

Lu Wang; Zhengzhong Feng; Hongwei Niu; Qi Gao; Mingqin Xu; Lin Yang; Jiaojiao Yi

doi:10.1007/s12540-022-01196-7

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자료유형: 학술저널

저자정보: Lu Wang (Jiangsu University) Zhengzhong Feng (Jiangsu University) Hongwei Niu (Jiangsu University) Qi Gao (Jiangsu University) Mingqin Xu (Jiangsu University) Lin Yang (Jiangsu University) Jiaojiao Yi (Jiangsu University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.28 No.12

발행연도: 2022.12

수록면: 2,987 - 2,996 (10page)

DOI: 10.1007/s12540-022-01196-7

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Phase constitution, microstructure, and mechanical properties of the as-cast and homogenized CrCuFeNiV multi principalelement alloys were investigated. Results show that the microstructures of CrCuFeNiV alloys either in the as-cast orhomogenized state were constituted by the dispersed Cu-rich fcc regions and the matrix regions (intertwined bcc + σ phases).Thereinto, the σ phase, ranged from nanometers to microns, was a complex multicomponent intermediate phase with a highsolubility for Fe, Cr, Ni, and V. This phase structure and hardness had an impressive thermal stability, which was evidencedby the current annealing treatment. High hardness (822 HV and 793 HV) was simultaneously achieved under an appliedload of 200 g in the as-cast and homogenized CrCuFeNiV alloys, on account of the incorporation of the high-stiffness σphase against the fcc and bcc phases. The ultimate compressive strength of ~ 1490 MPa was obtained in the as-cast alloydue to the high deformation resistance to the dislocation movement of bcc phase and precipitation strengthening of σ phaseat the expense of plasticity. The deterioration in plasticity was attributed to the stress concentration easily triggered by thehard and brittle σ phase.

#Multi principal element alloys · Phase structure · Microstructure · Mechanical properties · Hardness 1 Introduction Conventional alloys consist of mainly one principal element #whose atom fraction is greater than 50% #with smaller amounts of other elements to improve its properties. While the number of metallic elements is very finite #which dramatically limits options for alloy development [1]. In 2004 #a breakthrough in alloy design occurred due to the concept of multi principal element alloys (MPEAs) proposed by Cantor et al. [2] #which vastly expands the possibility of new multicomponent metallic alloys [3 #4]. Accordingly #a

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