Zhilyaev A., Pshenichnyuk A. Superplasticity and grain boundaries in ultrafine-grained materials

Cambridge International Science Publishing Ltd., 2011. 312 pp.
The book discusses a number of issues associated with the problems of description and experimental verification of the individual boundaries and grain boundary ensembles in polycrystals, and also investigations of processes such as grain boundary diffusion, relaxation and grain growth. This process is also an inseparable attribute of superplastic deformation. Our task is to explain what is specific in that grain size reduced from course grain one, at which superplastic regime becomes possible. The investigations of the grain boundaries are accompanied by the construction of such a model based on the experimentally determined relationships and concerned with the bands of cooperative grain boundary sliding. In addition, attention will be given to the processes of formation and evolution of the microstructure, texture and grain boundary ensembles in the materials produced by the methods of severe plastic deformation (SPD) which include equal channel angular pressing (ECAP) and high-pressure torsion (HPT).Structural superplasticity of polycrystalline materials
Characteristics of grain boundary enesembles
Orientation-distributed parameters of the polycrystalline structure
Experimental investigations of grain boundary ensembles in polycrystals
Grain boundary sliding in metallic bi- and tricrystals
Percolation mechanism of deformation processes in ultrafine-grained polycrystals
Percolation processes in a network of grain boundaries in ultrafine-grained materials
Microstructure and grain boundary ensembles in ultrafine-grained materials
Grain boundary processes in ultrafine-grained nickel and nanonickel
Duration of the stable flow stage in superplastic deformation
Derivation of constitutive equations in multicomponent loading conditions