Deformation behavior of Fe-Mn-Cr-N austenitic steel

The deformation-induced microstructures and fracture appearances of Fe-Mn-Cr-N austenitic steel have been studied by using metallography, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. E-Martensite and slip bands are the deformation-induced products on the {111}(gamma) planes and appear as thin straight laths with a 60-80 degrees alignment difference between them. E-Martensite and slip bands were found to be kinked at face-centered cubic twin boundaries with a kink angle of 35-40 degrees. The slip bands in the tensile deformation zone appear as a set of equilateral triangles. Slip-band traces with an intersecting angle of 60 degrees between the bands are also observed on the transgranular facets of both impact and tensile fractures. (C) Elsevier Science Inc., 1999. All rights reserved.