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Calculation of the slip system activity in deformed zinc single crystals using digital 3-D image correlation data

A 3-D image correlation system, which measures the full-field displacements in three dimensions, has been used to experimentally determine the full deformation gradient matrix for two zinc single crystals. Based on the image correlation data, slip system activity for the two crystals has been calculated. The results of the calculation show that, for one crystal, only the primary slip system is active, which is consistent with traditional theory. The other crystal, however, shows appreciable deformation on slip systems other than the primary. An analysis was conducted verifying the experimental observation that the net result from slip on the secondary slip systems is approximately one third the magnitude and directly orthogonal to the primary system.