Abstract
Measuring imprint is important to evaluate material’s mechanical property through indentation test. In this study, we propose a measurement method for vertical imprint displacement after an indentation test. we divided the imprint into two regions, a file-up region with small displacement and a sloped region with large displacement. We estimated the focus value with different sized Laplacian operators for the separated regions. Then, we combined these results and estimated the depth map using the depth from focus (DFF) method. We constructed the median line of the depth map from the center of the imprint and compared results to contact profiler data. Comparing the results for the three materials (Al 1050 - T6, Al 5052 - H32, Al 6061 - T651), the maximum error rate was found to be 5%. In future studies, this result can be used for the estimation of material properties using FEM data.
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