Research on Strain Hardening Behavior of Light-weight Fe-24Mn-7Al-1C Cast Wear Resistant Steel for Lining Plates

The novel of light-weight Fe-24Mn-7Al-1C cast wear-resistant steel for lining plates is compressed at the condition of quasi static and different deformation, strain hardening behavior during plastic deformation is analyzed, meanwhile, the work hardening mechanism of cast wear resistant steel is revealed. Based on the stress-strain curve and corresponding logarithmic true stress-logarithmic strain curve, the characteristic of compression deformation is researched. The microstructure of the novel steel before and after different deformation are further analyzed with the help of optical microscope (OM), X-ray diffraction (XRD) and transmission electron microscopy(TEM). The research results indicate that yield stage of strain hardening curve shows double work hardening index behavior. The transmission TEM and XRD analysis of deformation neither epsilon martensite nor mechanical twins are found, no cell formation is observed either,phase but austenite is found in the X ray diffraction analysis. In different deformation austenite after deformation in place, in turn, substructural developments are manifested by the dislocation pile ups(1% pre-strain), high density dislocation walls(5% pre-strain), Taylor lattice(10% pre-strain), Domain boundaries(20% pre-strain) and microbands(50% pre-strain) with high density of dislocations. So that the light-weight Fe-24Mn-7Al-C wear-resistant steel microscopic deformation mechanism is planar slip.