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논문 기본 정보

자료유형
학술저널
저자정보
Daehwan Kim (Pohang University of Science and Technology) Gyeong Hyeon Jang (Pohang University of Science and Technology) 이태경 (Pusan National University) Chong Soo Lee (Pohang University of Science and Technology)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.26 No.11
발행연도
2020.1
수록면
1,741 - 1,748 (8page)

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초록· 키워드

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This study investigated the dependence of grain orientation on the hydrogen embrittlement (HE) characteristics of high-Mntwinning-induced plasticity steels. Single-crystal micropillars were fabricated to represent the five major texture componentsof face-centered cubic structure: brass, Goss, copper, cube, and S components. These were classified into three groups fordiscussion based on the microstructural and mechanical characteristics. The copper and cube micropillars showed the lowestHE resistance because of an exclusive formation of twin boundaries that led to a localized hydrogen concentration. Brassand Goss micropillars revealed multiple slips with increasing strain, which was different from the case of S orientation thatexhibited the activation of single slip system. The results of this work suggest that increasing frequency of S componentgrains would enhance HE resistance owing to the inhibited twinning and suppressed dislocation mobility. This is supportedby the superiority of S/cube bicrystal micropillar to Goss/cube micropillar in terms of HE resistance.

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