Atomic-Scale Computer Simulation of Mixture Precipitation Mechanism for Ni75AlxV25-x Alloy

Abstract:

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With the microscopic phase-field model, the early precipitation mechanisms of the ternary Ni75AlxV25-x alloys with middle Al composition were explored by computer simulation in this paper. Through the simulated atomic pictures and composition order parameters of precipitates, we can explain the complex precipitation mechanisms of θ (Ni3V) and γ′ (Ni3Al) ordered phases. Simulated results also show that the precipitation characteristic of γ′ phase transforms from non-classical nucleation and growth to congruent ordering + Spinodal decomposition gradually, otherwise, the precipitation characteristic of θ phase transforms from congruent ordering + Spinodal decomposition to non-classical nucleation and growth mechanism gradually.

Info:

Periodical:

Materials Science Forum (Volumes 475-479)

Main Theme:

Edited by:

Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie

Pages:

3115-3118

DOI:

10.4028/www.scientific.net/MSF.475-479.3115

Citation:

Y. H. Zhao et al., "Atomic-Scale Computer Simulation of Mixture Precipitation Mechanism for Ni75AlxV25-x Alloy", Materials Science Forum, Vols. 475-479, pp. 3115-3118, 2005

Online since:

January 2005

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$35.00

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