Abstract
Abstract A theoretical analysis of diffusional creep in binary metallic solid solutions subjected to a uniform, uniaxial stress is presented. Equations are derived giving the strain rate and the distribution of the components at quasi-steady-state for both grain boundary and volume diffusion paths. The effects of non-ideality and equilibrium segregation are taken into account. The analysis shows that diffusional creep causes segregation to occur whenever the diffusivities of the components are unequal. In nickelbase solid solutions variations in solute concentration of several per cent are predicted. The influence of such segregation on creep and post creep properties of various types of alloys is discussed.
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