Search

Article

x

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

Phase field simulation on recrystallization and secondary phase precipitation under strain field

Zong Ya-Ping Wang Ming-Tao Guo Wei

Phase field simulation on recrystallization and secondary phase precipitation under strain field

Zong Ya-Ping, Wang Ming-Tao, Guo Wei
PDF
Get Citation
Metrics
  • Abstract views:  2897
  • PDF Downloads:  734
  • Cited By: 0
Publishing process
  • Received Date:  19 December 2008
  • Accepted Date:  19 February 2009
  • Published Online:  21 December 2009

Phase field simulation on recrystallization and secondary phase precipitation under strain field

  • 1. 东北大学材料各向异性与织构教育部重点实验室,沈阳 110004

Abstract: General theory and formula of phase field simulation are discussed to as certain physical meanings of some phenomenological parameters in the basic model. A new concept of boundary range is suggested to explain the physical backgrounds of the phase order parameter gradients at grain boundary and the diffusion grain boundary, separately. It is argued that the boundary range is not the geometrical boundary width of atom disorder and generally believed to be within 3—4 atom sizes. However, the range has an independent boundary feature to represent the grain boundary energy distribution range in which the solute alloy atoms are segregated from interior grain. A model is established to simulate the realistic spatio-temporal microstructure evolution in recrystallization of a magnesium alloy by using the phase field approach. A set of rules has been proposed to determine the real physical value of all parameters in the model. The simulated results are shown to be in good agreement with reported measurements at the temperatures from 300 to 400 ℃ for up to 100 min. The effect of applied strains field on the microstructure produced during α2 phase to O-phase (orthorhombic phase) transformation in Ti-25Al-10Nb alloy is finally studied by phase field simulation. The effects of strain direction on the volume fraction of O-phase and on the microstructure are investigated. It is also found that a full laminar microstructure can be formed when the applied strain is loaded along 〈1120〉 of α2 phase with magnitude greater than a half of the stress-free transformation strain. The significance and the potential application of the new simulation discovery are discussed.

Catalog

    /

    返回文章
    返回