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Influence of grain refinement on hot tearing in aluminium-copper alloys used in foundry industries

Published online by Cambridge University Press:  27 March 2003

M. Braccini ,
M. Suéry ,
C. Laguerre  and
M. Stucky
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Abstract

The hot tearing of aluminium-copper alloys is a serious defect for the foundrymen. The grain refinement of these alloys allows to decrease their hot tearing susceptibility. The aim of this work is to better understand the hot tearing mechanism and the grain refinement action. So, hot tearing tests and tensile tests in the mushy state have been performed. Moreover, a hot tearing model, based on the nucleation and growth of a cavity in a liquid film and taking into account the mushy zone rheology, has been developed.

Type
Research Article
Information
Metallurgical Research & Technology , Volume 100 , Issue 2: Science et Génie des MatériauxJournée Jean Morlet : J.A. SF2M 2001 , February 2003 , pp. 157 - 164
Copyright
© La Revue de Métallurgie, 2003

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