Solidification regularity of highly undercooled Fe-Co alloy

Acta Metall Sin

2007, Vol. 43

Issue (5): 449-453 DOI:

Research Articles

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Solidification regularity of highly undercooled Fe-Co alloy

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西北工业大学凝固技术国家重点实验室

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;. Solidification regularity of highly undercooled Fe-Co alloy. Acta Metall Sin, 2007, 43(5): 449-453 .

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Abstract Fe-Co melts with different Co contents were undercooled using fluxing purification method. With increasing the initial melt undercooling, grain refinement occurs twice in Fe100－x-Cox(x=10－40) alloy, except Fe90Co10. While the microstructure is no longer single phase and metastable phase appears when undercooling of the melt exceeds the critical undercooling. Moreover, except transition at low undercooling, the exact undercooling for microstructure transition and the critical undercooling for forming of metastable phase increase with the content of Co. Furthermore, BCT model and transient nucleation theory were applied to analyze the microstructure evolutions of Fe-Co alloy.

Key words: Fe-Co lloy solidification high undercooling

Received: 07 September 2006

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