Abstract

Behavior of plastic deformation is considered at asymmetric cyclic loading under creep and stress relaxation conditions. The specimens were tested within the logarithmic creep range. The cyclic creep curves as distinct from static ones display a turning point after which the magnitude of the accumulated plastic deformation becomes time-independent. The cyclic relaxation of stresses demonstrates the same behavior. These facts indicate that at cyclic loading there is a possibility of physical limits for creep and stress relaxation. Cyclic loading increases the number of parameters affecting the plastic deformation behavior.

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