Grain Boundary Migration in Metals: Recent Developments |
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Authors: | Günter Gottstein Dmitri A. Molodov Lasar S. Shvindlerman |
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Affiliation: | (1) Institut für Metallkunde und Metallphysik, RWTH Aachen, 52056 Aachen, Germany;(2) Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow distr, 142432, Russia |
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Abstract: | Current research on grain boundary migration in metals is reviewed. For individual grain boundaries the dependence of grain boundary migration on misorientation and impurity content are addressed. Impurity drag theory, extended to include the interaction of adsorbed impurities in the boundary, reasonably accounts quantitatively for the observed concentration dependence of grain boundary mobility. For the first time an experimental study of triple junction motion is presented. The kinetics are quantitatively discussed in terms of a triple junction mobility. Their impact on the kinetics of microstructure evolution during grain growth is outlined. |
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Keywords: | grain boundary mobility triple junction motion impurity drag orientation dependence migration mechanisms |
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