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High temperature evolution of the microstructure of a cast cobalt base superalloy - Consequences on its thermomechanical properties

Published online by Cambridge University Press:  06 October 2004

S. Michon ,
L. Aranda ,
P. Berthod  and
P. Steinmetz
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Abstract

The prolonged holding at high temperature of certain cast cobalt base superalloys may lead to rarefaction and fragmentation of the tantalum carbides which harden these alloys. Room temperature hardness, thermal dilatation and high temperature tensile strength have been studied in relation with these processes. Only the thermal dilatation coefficient and the modulus of elasticity are really affected by the evolution of the tantalum carbides.

Type
Research Article
Information
Metallurgical Research & Technology , Volume 101 , Issue 9: Science et Génie des Matériaux , September 2004 , pp. 651 - 662
Copyright
© La Revue de Métallurgie, 2004

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