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Coarsening kinetics of γ′ precipitates in the Ni–Al–Mo system

✍ Scribed by Tao Wang; Guang Sheng; Zi-Kui Liu; Long-Qing Chen

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
614 KB
Volume
56
Category
Article
ISSN
1359-6454

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✦ Synopsis

The effect of Mo on the microstructure evolution and coarsening kinetics of c 0 precipitates in the Ni-Al-Mo system is studied using phase-field simulations with inputs from thermodynamic, kinetic and lattice parameter databases. For alloys of different compositions, the precipitate morphology and the statistical information of precipitate sizes are predicted as a function of annealing time. It is observed that increasing Mo content leads to a change of the precipitate morphology from being cuboidal to spherical as well as a reduction in the coarsening rate. Comparison between simulated results and existing experimental microstructure morphologies and coarsening rates shows good agreements.

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