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We analyze the comparison of the fatigue characteristics and, in particular, the coefficients of tensioncompression and cyclic torsion based on the data of available tests performed under low-cycle fatigue in various materials. The correlation of torsion and tension-compression fatigue strength coefficients does not depend on the relative slope of the fatigue diagrams used to describe plastic strains...
The procedure of treatment of thermally hardened steel by pulses of shock waves from electric discharges in water increases its hardness and the limited fatigue strength. As a result of the action of shockwave pulses, the number of dislocations increases. This guarantees the propagation of deformation in a cycle, which promotes the increase in cyclic fatigue strength
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