| Microscopic Phase-Field Simulation of Atom Substitution Behaviour in Ni-Cr-Al Alloy |
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| 作者姓名： | 褚忠 陈铮 王永欣 卢艳丽 张建军 |
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| 作者单位： | StateKeyLaboratoryofSolidificationProcessing,NorthwesternPolytechnicalUniversity,Xi＇an710072 |
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| 摘 要： | Simulations are performed on atom substitution behaviour in Ni75Al25-xCrx alloys based on a microscopic phasefield model at 873K. The ordering of both the Al and Cr atoms takes place simultaneously, Cr occupies both the Al and Ni sites with a preference for the Al sites, and Cr and A1 atoms together occupy the β-sites, and the complex γ‘ Ni3 (Al1-x Crx) (L12 structure) phases are formed during the precipitation. At the ordering boundary of L12 phases, Cr atoms occupy the Al sites, then Ni3Cr phases are formed.
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| 关 键 词： | 铝合金 显微金相结构 原子替代法 模拟技术 |
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