DOI: 10.18503/1995-2732-2026-24-1-88-99
Abstract
Technological processes of cold sheet rolling are accompanied by uneven deformation of the steel billet, which is the main cause of residual stresses and can significantly affect the mechanical properties of sheet or strip rolled products. Unaccounted for residual stresses can lead to defects in the final processing operations of such products or premature failure of finished products. For the proper organization of the rolling process, it is necessary to predict the distribution of residual stresses at various technology parameters immediately at the time of cold-rolled products manufacture, therefore, the task of determining residual stresses and their impact on the quality of the steel sheet is relevant. The work is aimed at evaluating the residual stresses that occur during the manufacturing process of cold-rolled sheet billet intended for cold stamping using the thermoelectromotive force (TEMF) method. For the experimental determination of the TEMF values of cold-rolled strip samples made of 08Yu steel, an original method was used on the Gleeble 3500 system, which has previously proven effective in hardness studies using this method. It has been demonstrated that a strong positive correlation exists between the thermoelectromotive force (TEMF) values and residual stresses measured transverse to the rolling direction, which arise during the production of cold-rolled steel strip. This correlation indicates that as the residual stresses in the strip increase, the TEMF values also increase. The inverse relationship is also valid: higher TEMF values correspond to higher residual stresses in the transverse direction. A methodology has been proposed that involves constructing approximating lines for the experimental dependence of TEMF values on the temperature gradient. The slope of these lines represents the Seebeck coefficient, which can be used to evaluate residual stresses and to generate maps of their distribution over the strip surface. Thus, the applicability of the TEMF method for monitoring residual stresses in cold-rolled steel strip has been substantiated.
Keywords
cold-rolled strip, distribution of residual stresses along the length and width of the strip, thermoelectric research method, thermoelectromotive force, Seebeck coefficient
The work was carried out with the financial support of the Ministry of Science and Higher Education of Russia (project FZRU-2025-0003).
For citation
Chukin M.V., Koptseva N.V., Efimova Yu.Yu., Shemetov A.N. Thermoelectric Non-Destructive Evaluation of Residual Stresses in Cold-Rolled Steel Strip. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2026, vol. 24, no. 1, pp. 88-99. https://doi.org/10.18503/1995-2732-2026-24-1-88-99
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