Abstract
A tensile test of pure titanium plate specimen was performed on the stage of digital holographic microscope, and a change in the height of each grain on the surface was evaluated during the tests. The load was increased stepwise in the tensile test and the distribution of height change of each grain was evaluated at all steps in nanometer order. The identification of region before and after each loading step was done by the Digital Height Correlation Method (DHCM). The height change of each grain between low loading levels corresponded to that between relatively high loading levels, which suggests that the height change in plastic deformation occurred mainly by crystallographic slips can be predicted by that in elastic deformation. Slip lines after the plastic deformation were observed and the correlation of the slip lines and height change of the grain was discussed.
