Three-dimensional characterization of low-cycle fatigue crack morphology in TRIP-maraging steel: Crack closure, geometrical uncertainty and wear

被引：4
作者：
Zhang, Zhao [1 ,2 ]
Koyama, Motomichi [3 ]
Tsuzaki, Kaneaki [2 ,4 ]
Noguchi, Hiroshi [2 ]
机构：
[1] Ansteel Beijing Res Inst Co Ltd, Branch Vanadium & Titanium Res Inst, Future Sci Pk, Beijing 102209, Peoples R China
[2] Kyushu Univ, Dept Mech Engn, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan
[3] Tohoku Univ, Inst Mat Res, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan
[4] Natl Inst Mat Sci, Res Ctr Struct Mat, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2021年 / 143卷
关键词：
TRIP-maraging steel; Low-cycle fatigue; Roughness-induced crack closure; Hardness; Wear; WAKE PLASTICITY; ROUGHNESS; TRANSFORMATION; MARTENSITE; MECHANISMS; PROPAGATION; RESISTANCE; AUSTENITE; ALLOYS; GROWTH;
D O I：
10.1016/j.ijfatigue.2020.106032
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Low-cycle fatigue resistance of laminated transformation-induced plasticity (TRIP)-maraging steels is excellent due to roughness-induced crack closure (RICC). An increase in annealing time at 873 K simultaneously enhances retained austenite fraction and reduces hardness, but no difference in fracture surface roughness between the steels annealed for 1 h (1 h-steel) and 8 h (8 h-steel). Using three-dimensional characterization to investigate fatigue sub-cracks and roughness, RICC on specimen surface was observed in 8 h-steel, instead of 1 h-steel. However, due to hardness-dependent wear resistance, interior crack morphology in 1 h-steel presented remarkable asymmetric surfaces, sub-mu m-scale roughness and RICC, compared to 8 h-steel.
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页数：9
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