Abstract
A mathematical model was developed to calculate the relaxation of residual stresses in a surface-hardened prismatic sample subjected to biaxial loading under creep conditions. The calculation results were validated against experimental data for a surface-hardened sample of EP742 alloy after ultrasonic hardening under creep conditions at a temperature of 650 °C for 100 h. A detailed theoretical analysis was performed to investigate the effect of the type of stress state on residual stress relaxation under thermal exposure (temperature exposure in the absence of mechanical stress) and under biaxial loading at a constant intensity of external stresses. The results of the study show that in a plane stress state under uniform tension, there is a slowdown of residual stress relaxation, and under compression, there is an increase in the relaxation rate compared to the case of thermal exposure.
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Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, 2021, Vol. 62, No. 5, pp. 184-194. https://doi.org/10.15372/PMTF20210518.
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Radchenko, V.P., Berbasova, T.I. & Shishkin, D.M. RELAXATION OF RESIDUAL STRESSES IN A SURFACE-HARDENED PRISMATIC SAMPLE SUBJECTED TO BIAXIAL LOADING UNDER CREEP CONDITIONS. J Appl Mech Tech Phy 62, 861–869 (2021). https://doi.org/10.1134/S0021894421050187
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DOI: https://doi.org/10.1134/S0021894421050187