Article ID Journal Published Year Pages File Type
1581434 Materials Science and Engineering: A 2008 6 Pages PDF
Abstract
The effect of cooling rate from a temperature below the γ′ solvus on morphology of γ′ in a Ni-base superalloy, IN738LC, was investigated. At high cooling rates, γ′ showed solid-state morphological instability and as the cooling rate decreased, γ′ reduced in size and the growth occurred in a stable manner. The morphology changed from a cubic shape to a complex and flower-like shape as the cooling rate increased. The shape changes observed in this study suggested that the cooling rate has a significant impact on the misfit between γ and γ′. The morphological instability of γ′ is believed to be controlled by the degree of supersaturation in the matrix.
Related Topics
Physical Sciences and Engineering Materials Science Materials Science (General)
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