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| Effect of the Inclusions/precipitates size on the Intragranular ferrite nucleation |
| wWang wei;Li－Ming Fu |
| 上海宝钢股份有限公司 |
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Cite this article:
wWang wei; Li－Ming Fu. Effect of the Inclusions/precipitates size on the Intragranular ferrite nucleation. Acta Metall Sin, 2008, 44(6): 723-728 .
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Abstract Based on the classical nucleation theory a physical model was established to evaluate the effectiveness of intragranular ferrite nucleating at inclusions/precipitates. The influences of inclusion size, interfacial energy and contact angle on the ferrite nucleation rate were studied. Theoretical analysis indicates that the inclusions exhibiting lower contact angle with ferrite are most effective in promoting the nucleation of intragranular ferrite. Given the inclusion-matrix interfacial properties, the effectiveness of ferrite nucleation depends on the inclusion size. For arbitrary type of inclusion/precipitate, there exists an optimum size range in theory with maximum ferrite nucleation rate. The method for calculating this optimum size of inclusion was given, and the results showed a good agreement with experimental observations.
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Received: 25 October 2007
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