ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Precipitation and Growth of γ' and η Phases in 53Fe-26Ni-15Cr Alloy
Kiyoshi KusabirakiYushin TakasawaTakayuki Ooka
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1995 Volume 35 Issue 5 Pages 542-547


The nucleation and growth behavior of γ' and η precipitates in A286 alloy was investigated by micro-Vickers hardness test and transmission electron microscopy. The morphology and the crystallography of them were also discussed. The hardness of A286 aged at 893-1073 K for durations up to 720 ks was closely related to the mean size of γ' precipitates. The growth kinetic of the γ' precipitate in η-phase free region was explained by Lifshitz-Slyozov-Wagner's theory for diffusion controlled growth at 993-1073 K. The activation energy for the growth of the γ' precipitates was estimated to be 283 kJ/mol.

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© The Iron and Steel Institute of Japan
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