Microstructure and work-hardening mechanism of high manganese steel processed by asymmetrical cold rolling

Microstructure and work-hardening mechanism of a high manganese steel processed by asymmetrical cold rolling were investigated.The results show that the density of slip band of the high manganese steel is enhanced gradually with the increase of deformation amount.A lot of deformation twin and high density dislocation tangle appears in the high manganese steel after asymmetrical cold rolling,and the grain size is refined obviously.Face-centered cubic austenite structure remains and martensitic transformation does not occur in the deformed high manganese steel.The work-hardening mechanisms are different for the high manganese steel with different amount of deformation.