Retained austenite evolution behavior during unidirectional tension of low carbon medium manganese steel after intercritical rolling

doi:10.13251/j.issn.0254-6051.2020.08.010

Abstract

Abstract: Microstructure of a low carbon medium manganese steel after rolling under different pre-stretch amounts was analyzed, and the retained austenite evolution during unidirectional tension was investigated. The results show that transformation of retained austenite to martensite is mainly occurred in the yield stage with local plastic deformation, and is basically completed when the yield stage ends with the specimens getting into the uniform plastic deformation stage. A large number of dislocations are partially accumulated and migrated gradually during the tension, showing as the generation and migration of the Luders band macroscopically, and inducing the transformation of residual austenite to martensite in local microstructure. This phenomenon mostly occurs along the rolling direction and can't occur repeatedly.

Key words: low carbon medium manganese steel, retained austenite, Luders band

CLC Number:

TG142.1

Zhang Rui, Cao Wenquan, Hu Jun. Retained austenite evolution behavior during unidirectional tension of low carbon medium manganese steel after intercritical rolling[J]. Heat Treatment of Metals, 2020, 45(8): 47-49.

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