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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.2
- 수록면
- 572 - 582 (11page)
- DOI
- https://doi.org/10.1016/j.net.2020.07.015
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초록· 키워드
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This study investigated the creep and creep crack growth (CCG) behavior of the base metal (BM), weldmetal (WM), and heat affected zone (HAZ) in a Gr. 91 weldment, which was made by a shield metal arcweld process. A series of tensile, creep, and CCG tests were performed for the BM, WM, and HAZ at550 C. Creep behavior of the BM, WM, and HAZ was analyzed in terms of various creep laws; Norton’spower-law, Monkman-Grant relation and damage tolerance factor (l), and their constants were determined.
In addition, each CCGR law for the BM, WM, and HAZ was proposed and compared in terms of aC*-fracture parameter. The WM and HAZ revealed faster creep rate, lower rupture ductility, and fasterCCGRs than the BM, but they showed a similar behavior in the creep and CCG. The CCGRs obtained in thepresent study exhibited a marginal difference when compared with those of RCC-MRx of currentlyelevated design code in France. A creep crack path in the HAZ plane progressed towards a weak finegrainedHAZ adjacent to the BM.
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