Superplasticity and Grain Boundaries in Ultrafine-grained Materials - Tapa dura

The book deals with a number of problems associated with the description and experimental verification of the individual boundaries and ensembles of the grain boundaries in polycrystals. The role of these boundaries in processes such as grain boundary diffusion, relaxation and grain growth is investigated. It is attempted to construct a general model of superplasticity based on the experimentally determined relationships relating to the bands of co-operative grain boundary sliding. Special attention is given to the problems of formation and evolution of the microstructure, the texture and ensembles of the grain boundaries in materials produced by severe plastic deformation methods.