Dislocation creep
= Dislocation creep
<Dislocation creep> is time-dependent crystal deformation through motion and interactions of dislocations. A common constitutive model is $\dot\epsilon=A\sigma^n\exp[-(E^*+PV^*)/(RT)]$ with $n>1$, giving stress-dependent effective <viscosity>. Unlike <diffusion creep>, it often has weak grain-size dependence over the regime being modelled.