An advanced fitting method for crystallographic and morphological analyses of EBSD data applied for low-carbon steel martensite

Abstract

Some essential modifications were introduced to the ordinary fitting method to make it become a powerful tool for thorough crystallographic and morphological analyses of lath martensite based on electron backscatter diffraction (EBSD) data. A large area of martensite which covers a whole prior austenite grain can be effectively analyzed. The austenite orientation and orientation relationship between martensite and austenite can be obtained by fitting from martensite orientations. The fitting procedure is fast with high precision up to 0.5 degrees for austenite orientation and 0.2 degrees for the orientation relationship. The output data are also modified for automatically indexing martensite variants and visual plotting of the results. © 2013 The Japan Institute of Metals and Materials.