The microstructural aspects of the superplastic phenomenon are reviewed. The experimental results of a very large number of investigations are critically analysed in the context of: grain shape and size; grain growth; grain boundary sliding and migration, grain rotation and rearrangement; diffusion and dislocation activity. It is shown, that in spite of often conflicting evidence in the literature, a common pattern of microstructural behaviour emerges for all the materials and conditions investigated to date.

Microstructural aspects of superplasticity

A model for the rate-controlling mechanism in superplasticity

Mechanisms for grain size hardening and softening in Zn

A model for creep based on the climb of dislocations at grain boundaries

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R Pearce

Papers

Superplasticity in A Zn-0.4% Al alloy