Some Observations on the Martensite Substructure in an Fe-3% Cr-1.5% C Alloy

Abstract

Transmission electron microscopy and diffraction analysis of martensite plates (with a habit plane between {225}_a and {259}_a) in an Fe-3% Cr-1.5% C alloy reveals the presence of both {112}_m and {110}_m planar defects. The density of {110}_m planar defects in this alloy is lower than that for an Fe-1.82% C steel with a {259}_a habit plane, and it is inferred that the habit plane shift from {225}_a to {259}_a is associated with an increased density of {110}_m defects. Different junction planes between impinged martensite plates were found.