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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2024.6
- 수록면
- 1,513 - 1,526 (14page)
- DOI
- 10.1007/s12540-023-01595-4
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초록· 키워드
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The discontinuous characteristics of the yielding behavior in a high Mn austenitic steel was examined in specimens withdifferent grain sizes. In the stress–strain curves of the fine-grained specimens, both the stress drop and Lüders strain wereobserved, but as the grain size increases it becomes difficult to distinguish the signals related to the yield point phenomena.
The effect of grain size on the local deformation behavior was quantitatively investigated using both the digital image correlationmethod and a simple displacement analysis method. While the velocity of the Lüders band was higher, the amountof Lüders strain was decreased with increasing the grain size. The results are mainly related to the degree of strain concentrationduring Lüders band propagation. Based on the interactions between the dislocations and grain boundaries, the effectof grain size on the overall discontinuous yielding behavior was discussed.
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