QUANTITATIVE VERIFICATION OF HIGH-STRENGTH ALLOYED STEEL BAINITE-MARTENSITE STRUCTURES BY SCANNING ELECTRON MICROSCOPY METHODS

A method is considered for panoramic crystallographic analysis of bainite and martensite structures based on images of crystal lattice curvature and making it possible to identify α-phase varieties, and also to determine their volume fraction. The method is proven successfully for high-temperature alloy steels, for which by means of dilatometry and expert evaluation of metallographic images a characteristic scale is plotted for lattice curvature, whose ranges correspond to bainite and martensite structural types.