Abstract
Even when a macroscopically uniform deformation is applied to a polycrystalline material, the generated microscopic strain distribution will not be uniform due to factors such as the non-uniform grain orientation distribution and grain boundaries. Despite the strong need to accurately measure strain distributions, suitable method is limited. This study proposes an experimental method for estimating strain distributions in polycrystalline materials. The in-plane displacement distribution was determined by analyzing microscopy images obtained before and after deformation and calculating the displacement differences. The active slip plane was then determined by comparing the angle of {111} planes in each grain and the slip line angle obtained from scanning electron microscope (SEM) images. Finally, six components of strain tensor were estimated by assuming a single slip system.
