Abstract
The past, present, and possible future development of basic models for engineering processes in powder metallurgy are examined. Special attention is devoted to the rheological concept of sintering and strain, as well as to the “mean-square” concept which together form the ideological basis for many existing models. Modern generalizations of sintering models to the cases of anisotropy and phase transitions in the matrix material are examined. Models of plastic and nonlinearly viscous flows that follow from the “mean-square concept” concept are correlated with other theories of flow in porous media. The relationship among these is established. The possible use of these ideas for solving current problems in materials science is discussed.
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