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논문 기본 정보

자료유형
학술저널
저자정보
Jiaojiao Yi (Jiangsu University of Technology) Lin Yang (Jiangsu University of Technology) Lu Wang (Jiangsu University of Technology) Mingqin Xu (Jiangsu University of Technology)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.7
발행연도
2021.1
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2,387 - 2,394 (8page)

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초록· 키워드

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The phase component, microstructure, and compressive properties of a novel 3d transition metal high entropy alloy, CoCuNiTiV, derived from Fe replaced by V in CoCuNiTiFe alloy, were evaluated in as-cast and annealed conditions. The experiments showed that the as-cast alloy possessed a typical BCC+FCC dual-phases, which distinctly varied from the singleFCC phase of an adjacent CoCuNiTiFe alloy. The BCC phase takes up the majority acting as the matrix, in which Cu wasdepleted, and the other elements (i.e., Co, Ni, Ti, and V) were distributed homogenously. Meanwhile, the FCC phase wasCu-rich, and sandwiched in the interval space between the BCC phases forming a net-like framework. After annealing, thematrix bifurcated into two parts: (i) one that remained as the primary BCC phase and (ii) another that decomposed into aCo2Ti-type laves phase and a new BCC phase. Meanwhile, the Cu-rich net-like framework is deteriorated forming a seriesof evenly distributed particles. The yield strength and the fracture strength of the as-cast and annealed alloy are highlysimilar— about 1674 and 2400 MPa, respectively. The hardness of the annealed alloy (572.9±10.6 HV) was slightly higherthan that of the as-cast alloy (530.3±12.2 HV).

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