Crack propagation behavior of medium manganese automobile steel in 0.13C-5Mn
ZHOU Feng-luan1,2, WANG Cun-yu1, LEI Zhi-guo1,3, CAO Wen-quan1, DONG Han1,4
1. Institute of Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China 2. Testing Center, NCS Testing Technology Co., Ltd., Beijing 100081, China 3. Institute of Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China 4. School of Material Science and Engineering, Shanghai University,Shanghai 200072, China
Abstract：In order to study the crack propagation characteristics of medium manganese steel in 0.13C-5Mn whose matrix is ferrite and metastable austenite,the crack propagation test was carried out by load control,and the crack propagation behavior was characterized by SEM and EBSD. The results show that the crack propagation mechanism is a double mechanism of slip and accumulation damage. In the plastic zone of crack tip,the transition of metastable austenite to martensite is much smaller than that of plastic zone at crack tip,and the fatigue crack propagation rate is reduced due to the absorption of energy by phase change and crack closure effect.
周峰峦, 王存宇, 雷志国, 曹文全, 董瀚. 0.13C-5Mn中锰钢的裂纹扩展行为[J]. 钢铁, 2019, 54(12): 75-80.
ZHOU Feng-luan, WANG Cun-yu, LEI Zhi-guo, CAO Wen-quan, DONG Han. Crack propagation behavior of medium manganese automobile steel in 0.13C-5Mn. Iron and Steel, 2019, 54(12): 75-80.
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2019, Vol. 54 
