| Abstrakt: |
1.With different combinations of processes determining the deformation of precipitation-hardening steels, viz., the contraction in specific volume on aging, swelling on fast-neutron irradiation, creep under static loading, cyclic deformation during thermal cycling, interaction takes place between them which includes the following:the thermal and deformation aging of steel retards the development of creep, radiation swelling, and cyclic deformation during thermal cycles;the neutron irradiation of steel retards the cyclic deformation during thermal cycles and affects the development of creep in more than one way;in the absence of creep static and cyclic elastic loading accelerates radiation swelling;creep and the cyclic plastic deformation of steel accelerate the contraction of the specific volume during aging and retardstatic elastic loading and creep accelerate cyclic deformation during thermal cycles.The remaining factors in the interaction do not make an appreciable contribution to the variation in the steel deformation processes.2.Relationships have been derived which define the deformation kinetics of a precipitation-hardening steel with the combined growth of different processes and enable the resulting effect to be estimated by nonlinear summation of its individual components taking into account the mutual effect. |
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