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Abstract The morphology and kinetics evolution of γ′ and γ phases in Ni-xAl-(20‒x)Cr at% (x = 7.5–13.7) alloys aged at 700 °C were studied by utilizing the phase-field simulation. The separated γ′ phases… Click to show full abstract
Abstract The morphology and kinetics evolution of γ′ and γ phases in Ni-xAl-(20‒x)Cr at% (x = 7.5–13.7) alloys aged at 700 °C were studied by utilizing the phase-field simulation. The separated γ′ phases from γ matrix in low Al content (x 13) alloys, and long-time aging produced near cubic γ′ phase. The coarsening rate of γ′ phase declined firstly when the Al content x = 7.5–9.0, then increased sharply as x ranges from 9 to 12, while the coarsening rate of γ phase declined directly. Additionally, the average edge-to-edge distance of neighboring γ′ phases showed a three-stage variation when Al content x
Journal Title: Progress in Natural Science: Materials International
Year Published: 2020
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