Author： Moldovan D. Wolf D. Phillpot S. R. Haslam A. J.
Publisher： Taylor & Francis Ltd
ISSN： 0141-8610
Source： Philosophical Magazine. A. Physics of Condensed Matter. Defects and Mechanical Properties, Vol.82, Iss.7, 2002-05, pp. : 1271-1297
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Abstract
Grain-boundary (GB) properties in a polycrystalline system are generally anisotropic; in particular, both the GB energy and the mobility depend on the GB misorientation. Here the effect of anisotropic GB properties on twodimensional grain growth is investigated by computer simulation. A stochastic velocity Monte Carlo algorithm based on a variational formulation for the dissipated power is implemented. The simulations show that grain growth leads to an increase in the fraction of small-angle GBs during the growth process. The average grain area is found to grow with a smaller exponent than in a system with isotropic GB properties. An extended von Neumann-Mullins relation based on averaged GB properties is proposed.
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