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

doi:10.3901/JME.2016.08.125

Abstract

Abstract: 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 ε 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.

Key words: Fe-24Mn-7Al-1C steel, light-weight, lining plates, microbands, microscopic deformation mechanism, wear resistant steel

CLC Number:

TG142

PENG Shiguang, SONG Renbo, TAN Zhidong, WANG Zhonghong, GUO Ke, GAO Jingjun. Research on Strain Hardening Behavior of Light-weight Fe-24Mn-7Al-1C Cast Wear Resistant Steel for Lining Plates[J]. Journal of Mechanical Engineering, 2016, 52(8): 125-132.

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