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Interphase kinematics and the roles of structure and composition in solid-state transformations

1987; Pergamon Press; Volume: 21; Issue: 8 Linguagem: Inglês

10.1016/0036-9748(87)90243-2

1878-2663

G. B. Olson,

Microstructure and mechanical properties

The general solid-state phase transformation involves a change of both structure and composition. The theory of diffusional solid-state transformations has largely evolved from adaptation of the theory of compositional transformations in fluids, with only minor consideration of the structural issues which define the solid state. The structural aspects of phase transformations have been developed to a high degree of sophistication in the case of diffusionless martensitic transformations, but the application of the principles involved to other transformations has been hampered by a lack of appreciation of their generality. After examining the general structure-based features of solid-state transformations, we will consider the case of a coupled transformation in which the processes of structural and compositional change play equally important roles in the kinetics of the reaction.