Abstract
The localization of plastic strain in the extension of 08ps low-carbon steel is compared after hot rolling and after electrolytic saturation with hydrogen by means of a three-electrode electrochemical cell. Analysis of the strain curves shows that they include a plasticity region, a stage of linear strain hardening, and a stage of parabolic strain hardening (Taylor hardening). Double-exposure speckle photography is used to visualize the localized strain zones. On that basis, the quantitative deformation characteristics may be obtained. In other words, the displacement-vector field in a plane sample under extension may be determined, and then the components of the plastic distortion tensor (the local elongation ε xx , shear ε xy , and rotation ω z ) may be calculated. The basic types of plastic flow localization are identified at different stages of strain hardening, and their parameters are determined.
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Original Russian Text © S.A. Barannikova, D.A. Kosinov, L.B. Zuev, V.E. Gromov, S.V. Konovalov, 2016, published in Izvestiya Vysshikh Uchebnykh Zavedenii, Chernaya Metallurgiya, 2016, No. 12, pp. 891–895.
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Barannikova, S.A., Kosinov, D.A., Zuev, L.B. et al. Influence of hydrogen on the localization of plastic strain in low-carbon steel. Steel Transl. 46, 851–854 (2016). https://doi.org/10.3103/S0967091216120020
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DOI: https://doi.org/10.3103/S0967091216120020