In-situ observation on the deformation behaviors of Fe-Mn-C TWIP steel

Zhen-li Mi, Di Tang, Yong-juan Dai, Hai-tao Jiang, and Jian-chong Lü National Engineering Research Center for Advanced Rolling Technology, University of Science and Technology Beijing, Beijing 100083, China

摘 要：The microstructure and crack behaviour of twinning induced plasticity （TWIP） steel during tensile deformation was investigated with in-situ scanning electron microscopy （SEM）. The results show that there are two modes of plastic deformation during tensile test in the Fe-Mn-C TWIP steel: dislocation gliding and deformation twins. During the process of tensile deformation, secondary deformed twins are found. Inclusions have played a role in the course of ductile fracture, and microcracks initiate from inclusions and twin-twin intersections.

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