Abstract
Diffusion induced grain boundary migration (DIGM) is a phenomenon in which the sideways migration of grain boundaries accompanies the diffusion of solute along them. This results in the deposition of solute in, or its removal from, the matrix through which the boundaries sweep. In this review, the detailed phenomenology of DIGM is described, and the theories which have been proposed to explain it are compared critically with the phenomenology itself. The potential uses of DIGM in engineering the properties of materials are discussed.
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