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| Phase field simulation of lower volume fraction phase precipitation process |
| You Yuan;Mufu Yan;Yiqiang Chen |
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Cite this article:
You Yuan; Mufu Yan; Yiqiang Chen. Phase field simulation of lower volume fraction phase precipitation process. Acta Metall Sin, 2008, 44(10): 1171-1174 .
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Abstract The phase field model for predicting second-phase precipitation has been established based on constructing free energy function and considering the effect of grain boundary on the second-phase precipitation process. The numerical simulation of the second-phase precipitation inside the grain and on the grain boundary was carried out in the system with the solute volume fraction less than 2%. The results show that the proportion of second-phase precipitate inside grain and on the grain boundary depends on the item in which ηiand m are orientation variable and exponent relative to the second phase profile, respectively. The proportion of the precipitates inside the grain increases with decreasing m and the size of the second-phase precipatate depends on the gradient energy coefficient κcat the same phase field step. All the precipatates appear on the grain boundary under m=1 or a larger κc value condition.
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Received: 08 April 2008
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