The main regularities are found in the deformation and failure of heat-resistant steel 25Cr1Mo1V after service under static load and complex loading mode “static load – additional impulse loading – static load”, when dynamic unbalanced processes are implemented. The fractographic investigations performed confirmed the revealed regularities in the modification of the mechanical properties of the steel 25Cr1Mo1V under the action of impulse loads of identical intensity at different levels of the preliminary static deformation.
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