Deformation and Ductility of Low-Carbon Steel with Different Magnitudes of Strain Aging Effect. 2. Strain on the Yield Plateau

Abstract

Maps of the strain tensor component ε_yy and profiles of the distribution of ε_yy along the length of the sample plotted by the method of digital image correlation are used to study the evolution of ε_yy and the width b_b of the nucleating center, of the band nucleus and the band itself during tension of sample 1 of steel 08G2B exhibiting a high magnitude of the strain aging effect (SAE) after heating to T_h = 250°C; the results are compared to the data for sample 2 (T_h = 680°C) with low SAE. The experimental data obtained are used to reconstruct at the micro- (dislocation) level the process of formation and growth of the nucleating center and of the nucleus of the localized strain band emerging from it.