MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Refinement of γ Precipitate with Melt Undercooling in Nickel-based Superalloy
Liu FengYang Gencang
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2001 Volume 42 Issue 6 Pages 1135-1138

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Abstract

The effect of melt undercooling on the γ precipitation is investigated in nickel-based superalloy by employing the method of molten salt denucleating combined with thermal cycles. The application of SEM and TEM technique allows to further confirm and interpret γ formation mechanism here. In connection with the classical nucleation theory, it is found that not only the size of precipitated γ but its distribution in the as-solidified structure is also drastically influenced by the melt undercooling.

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© 2001 The Japan Institute of Metals and Materials
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