Simulation of the precipitation process of Ni_(75)Al_xV_(25-x) alloys incorporated in the microelast

来源 :Journal of University of Science and Technology Beijing | 被引量 : 0次 | 上传用户:jimmyhill
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The microelasticity field was incorporated into the microscopic phase-field equation for the ternary alloy systems, the morphology evolution and coarsening behavior of the Ni_(75)Al_xV_(25-x) alloy were simulated. The γ′ phase precipitates initially for Ni75Al7.1V17.9 and Ni75Al5.5V19.5 alloys and the two phases transform from the equiaxed or strip-like to the quadrate as the growth and coarsening processes. For the anisotropic elasticity interaction of the system, the orientation of γ′ is along the <001> directions and the θ phase is along the short axis direction of [10]. Analysis of the structure and the pair-correlation functions indicate that the aver- age precipitate length scale of the particles increases at the late-stage coarsening, and the dynamical scaling behavior is obeyed. The microelasticity field was incorporated into the microscopic phase-field equation for the ternary alloy systems, the morphology evolution and coarsening behavior of the Ni_ (75) Al_xV_ (25-x) alloy were simulated. The γ 'phase precipitates initially for Ni75Al7.1V17 .9 and Ni75Al5.5V19.5 alloys and the two phases transform from the equiaxed or strip-like to the quadrate as the growth and coarsening processes. The anisotropic elasticity interaction of the system, the orientation of γ 'is along the <001 > directions and the θ phase is along the short axis direction of [10]. Analysis of the structure and the pair-correlation functions indicate that the aver-age precipitate length scale of the particles increases at the late-stage coarsening, and the dynamical scaling behavior is obeyed
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