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Chinese Science Bulletin

, Volume 58, Issue 24, pp 3023–3032 | Cite as

Modeling of static coarsening of two-phase titanium alloy in the α+β two-phase region at different temperature by a cellular automata method

  • Chuan Wu
  • He Yang
  • HongWei Li
Open Access
Article Materials Science

Abstract

A cellular automata (CA) method was employed to model static coarsening controlled by diffusion along grain boundaries at 1173 K and through the bulk at 1213 and 1243 K for a two-phase titanium alloy. In the CA model, the coarsening rate was inversely proportional to the 3rd power of the average grain radius for coarsening controlled by diffusion along grain boundaries, and inversely proportional to the 2nd power of the average grain radius for coarsening controlled by diffusion through the bulk. The CA model was used to predict the morphological evolution, average grain size, topological characteristics, and the coarsening kinetics of the Ti-6Al-2Zr-1Mo-1V (TA15) alloy during static coarsening. The predicted results were found to be in good agreement with the corresponding experimental results. In addition, the effects of the volume fraction of the α phase (V f) and the initial grain size on the coarsening were discussed. It was found that the predicted coarsening kinetic constant increased with V f and that a larger initial grain size led to slower coarsening.

Keywords

CA model morphology coarsening kinetics bulk diffusion-controlled boundaries diffusion-controlled 

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Copyright information

© The Author(s) 2013

Authors and Affiliations

  1. 1.State Key Laboratory of Solidification Processing, School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’anChina

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