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논문 기본 정보

자료유형
학술저널
저자정보
Min Ji Jang (Pohang University of Science and Technology (POSTECH)) Hyunjeong Kwak (Pohang University of Science and Technology (POSTECH)) Ye Won Lee (Pohang University of Science and Technology (POSTECH)) Youjin Jeong (Pohang University of Science and Technology (POSTECH)vv) Jahong Choi (Pohang University of Science and Technology (POSTECH)) Yong Hee Jo (Pohang University of Science and Technology (POSTECH)) Won-Mi Choi (Pohang University of Science and Technology (POSTECH)) Hyun Je Sung (POSCO) Eun Yoo Yoon (Korea Institute of Materials Science) S. Praveen (Pohang University of Science and Technology (POSTECH)) Sunghak Lee (Pohang University of Science and Technology (POSTECH)) Byeong-Joo Lee (Pohang University of Science and Technology (POSTECH)) Mohamed Ibrahim Abd El Aal (Sattam Bin Abdulaziz University) Hyoung Seop Kim (Pohang University of Science and Technology (POSTECH))
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.25 No.2
발행연도
2019.1
수록면
277 - 284 (8page)

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초록· 키워드

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A single FCC phase 40Fe–25Ni–15Cr–10Co–10V high-entropy alloy was designed, fabricated, and evaluated for potentialcryogenic applications. The alloy forms a single FCC phase and exhibits higher yield strength, tensile strength, and elongationat cryogenic temperature (77 K) than at room temperature (298 K). The superior tensile properties at cryogenic temperatureare discussed based on the formation of deformation twins during the tensile test at cryogenic temperature. In addition, aconstitutive model reflecting the cryogenic deformation mechanism (i.e., twinning-induced plasticity) was implementedinto the finite element method to analyze this behavior. Experimental results and the finite element analysis suggest that theincrease in plastic deformation capacity at cryogenic temperature contributes to the formation of deformation twins.

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