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논문 기본 정보

자료유형
학술저널
저자정보
Yijiang Zeng (National University of Defense Technology) Yu Pan (National University of Defense Technology) Ning Wang (National University of Defense Technology) Jian Chen (National University of Defense Technology) Xianhui Cai (Dalian University of Technology)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.29 No.5
발행연도
2023.5
수록면
1,346 - 1,357 (12page)
DOI
10.1007/s12540-022-01313-6

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The creep fracture behavior between selective laser melted (SLMed) and forged alloy 230 after testing at 1200 °C under differentapplied stresses was compared. The results showed that both the creep behavior of SLMed and forged alloy 230 followedthe power law and obeyed the Monkman–Grant relation. The SLMed samples parallel to the building direction exhibitedsuperior creep resistance than those perpendicular to the building direction, and the forged samples were in between, whilethey all exhibited poor creep ductility compared with that of the forged samples. Furthermore, the relations of applied stressand maximum allowable creep lifetime could be built to evaluate the creep resistance of the alloys. The SLMed samplesparallel to the building direction showed discrete trans/intergranular cracks, while those perpendicular to the building directionand forged materials depicted continuous and discrete intergranular cracks, respectively. Furthermore, the creep fracturemodes at different loadings were revealed by correlating the creep damage tolerance factor with the fractured microstructure.In addition, the effects of the initial microstructure characteristics, such as grain morphology, grain boundaries, grain size,internal defects and precipitates, on the creep strength and life at high temperatures were presented and analyzed.

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