Identification of some Crystallographic Features of Martensite in Steels by Microdiffraction

Abstract

Considerable attention should be paid to the interpretation of electron diffraction, such as the understanding of the extra reflections and other effects in an SAD pattern obtained from lath martensite by making allowances for spatial resolution limitations in the SAD patterns. These difficulties can be overcome by utilizing the convergent beam electron diffraction (CBED) method which permits the use of different probe sizes to obtain crystallographic information from very small regions. In the present study some crystallographic features of lath martensite in low and medium C steels have been Identified and some others verified by using CBED.