Fatigue Cracking Characterization of High Grade Non-oriented Electrical Steels
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2017年第6期
论文作者：杜丽影 周桂峰 LIU Jing SHI Wenmin BI Yunjie CHENG Zhaoyang XUE Huan
文章页码：1329 - 1335
摘 要：The fatigue behavior of 30 WGP1600 non-oriented electrical steel, which is generally used in the motors for electrical vehicles, was investigated. The detailed microstructure and dislocation configurations of the fatigue specimens were examined by OM, SEM, and TEM. The test results showed that fatigue cracks were commonly initiated from the surface grain boundaries, crystals plane, and inclusions. The rapid fatigue crack propagation was characterized by transgranular cleavage fracture, while most transient fracture exhibited ductile tearing characteristics. After cyclic deformation of the non-oriented electrical steels, various dislocation structures, such as short and thick lines, veins, persistent slip bands, cells, and labyrinth, were observed.
杜丽影1,2，周桂峰1，LIU Jing1，SHI Wenmin2，BI Yunjie1,2，CHENG Zhaoyang1，XUE Huan2
1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology2. Wuhan Branch of Baosteel Central Research Institute (R&D Center of Wuhan Iron & Steel Co.Ltd.)
摘 要：The fatigue behavior of 30 WGP1600 non-oriented electrical steel, which is generally used in the motors for electrical vehicles, was investigated. The detailed microstructure and dislocation configurations of the fatigue specimens were examined by OM, SEM, and TEM. The test results showed that fatigue cracks were commonly initiated from the surface grain boundaries, crystals plane, and inclusions. The rapid fatigue crack propagation was characterized by transgranular cleavage fracture, while most transient fracture exhibited ductile tearing characteristics. After cyclic deformation of the non-oriented electrical steels, various dislocation structures, such as short and thick lines, veins, persistent slip bands, cells, and labyrinth, were observed.
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