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Microscopic Phase-Field Simulation of Atom Substitution Behaviour in Ni--Cr--Al Alloy |
| CHU Zhong;CHEN Zheng;WANG Yong-Xin;LU Yan-Li;ZHANG Jian-Jun |
| State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072 |
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| Cite this article: |
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CHU Zhong, CHEN Zheng, WANG Yong-Xin et al 2005 Chin. Phys. Lett. 22 1841-1844 |
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Abstract Simulations are performed on atom substitution behaviour in Ni75Al25-xCrx alloys based on a microscopic phase-field 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 Al atoms together occupy the β -sites, and the complex γ’ Ni3(Al1-xCrx) (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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| Keywords:
05.10.Gg
81.30.Hd
81.30.Mh
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Published: 01 August 2005
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| PACS: |
05.10.Gg
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(Stochastic analysis methods)
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81.30.Hd
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(Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder)
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81.30.Mh
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(Solid-phase precipitation)
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