摘要
A ternary microscopic phase-field kinetic model was used to investigate the early γ′ precipitation process of Ni75Al15Fe10 alloy by simulating the evolution of the atomic morphology, calculating long-range order parameters and concentration, and characterizing the curve of site occupation of Fe atoms at different lattice sites in the γ′ phase at annealed temperatures 973, 1173, 1253 K. The results show, while the temperature increasing, γ′ precipitation mechanism of Ni75Al15Fe10 alloy is transformed from the congruent ordering and spinodal decomposition to non-classic nucleation and growth; the incubation period of the γ′ phase is prolonged; Fe atoms more and more difficultly occupy the B-site (the corner site of fcc) and the occupation probability gradually decreases. The precipitated γ′ phase (L12 structure) is a kind of the complex Ni3(Al1-xFex) single-phase.
源语言 | 英语 |
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页(从-至) | 1797-1801 |
页数 | 5 |
期刊 | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
卷 | 36 |
期 | 10 |
出版状态 | 已出版 - 10月 2007 |