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Journal Articles
12mntinb gang zhong li zhuang bei shi ti zu zhi de bian xing he duan lie
Pages: 14-18
Year: Issue:  1
Journal: Materials Science and Technology

Keyword:  granular bainitedeformationfracture;
Abstract: The deformation and fracture behaviours of granular bainite microstruc- ture in 12MnTiNb steel have been studied.It was shown that the plastic deformation of granular bainite is mainly undergone in ferrite,and(M—A) islands are ductile deformable particles.Microcracks are dominantly initiated at the interfaces between(M—A)islands and the matrix,and grow into voids in the part of ferrite.Cracks can propagate along the heavy slip bands and the original austenite grain boundary.The connection of neighbouring microcracks with the main crack leads to the final fracture which is of ductile characteristic with a fractograph of dimples.
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