Effect of sample thinning on strains and lattice rotations measured from Transmission Kikuchi diffraction in the SEM

Cross correlation based high angular resolution EBSD (or HR-EBSD) has been developed for measurement of elastic strains, lattice rotations (and estimating GND density). Recent advances in Transmission Kikuchi diffraction (TKD), especially the on-axis geometry allows possibility acquiring patterns at higher spatial resolution. However, some controversy remains as to whether stresses/strains measured after sample thinning process are still representative bulk sample. In this paper, we explore a way applying HR-EBSD method study strains and an initially sample, that is then progressively thinned down until similar analysis can be performed on thin electron transparent) samples. Thus, HR-TKD will compared possible alternative HR-EBSD, scenarios when it not always perform surface An estimate strain relaxation result presented. • Extends already popular Cross-correlation technique TKD. Answers question if using FIB relaxes stress/strain Alternative TKD approach area interest accessible by methods. A configuration minimise bending during lift-out technique.