Abstract
AbstractMicrostructural evolution of secondary γ′ precipitates in superalloy FGH96 under various aging treatments after 1200 °C solution treatment was investigated. The results indicate that particle size of secondary γ′ precipitates increases from about 73 μm to about 587 μm with the increasing of aging temperature in the range of 850–1120 °C, and the shape of secondary γ′ precipitates changes from spherical to cuboidal, and to butterfly-like with the increase of aging temperature. In case of the aging temperature of 1120 °C, the γ′ precipitates change into butterfly-like and the size is the largest. When the aging temperature reached 1140 °C, the γ′ precipitates are refined.
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