摘要: AbstractThere have been a number of rate equations proposed in the literature for growth grain-boundary cavities during creep. Implicit all these analyses is assumption that occurs freely and no constraints exist would attenuate predicted rates. It shown constraint on can occur polycrystals because creep are inhomogeneously distributed amongst various grain boundaries. This attenuation to be greatest when high-strength alloys with large cavity populations deformed slowly least pure metals low quickly. The application ideas multiaxial stress states extrapolation procedures discussed knowledge unconstrained directly proportional maximum principal tensile stress, whereas constrained nth power octahedral shear stress.
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