MICROSTRUCTURE AND MORPHOLOGY OF HIGH MANGANESE NON-MAGNETIC STEEL

Two types of lath structures and kinked ε martensite were observed in the high manganesenon-magnetic steel.Both the short non-continuous lath formed by quenching and the longthin straight lath induced by plastic deformation are composed of ε martensite and fcc twin.The transformation mechanism was discussed.The crystallographic analysis indicates that thee martensite at both sides of the fcc twin boundary is of kinked morphology owing to theorientation of their matrices differing from each other.The kinked region is hcp twin.