Computation of Strain in Deformed Pearlitic Steel Using Digital Image Correlation Technique

In the present paper, digital image correlation (DIC) technique has been used to investigate the deformation process in metal and alloys. For this purpose, of a sample of pearlitic steel, comprising a fine distribution of alternate layers of ferrite and cementite, was deformed, and the same region of the sample was investigated before and after deformation. The analysis of the deformation of the sample was carried out using an open-source software Ncorr. Using DIC technique displacements along preselected x and y-axes were estimated, which were, in turn, used in computing strains along x and y directions representing normal strains along with shear strains. The results obtained have elucidated variation and localization of the strain at different points of the sample.