Numerical Simulation for Grain Refinement of Aluminum Alloy by Multi-phase-field Model Coupled with CALPHAD
Numerical Simulation for Grain Refinement of Aluminum Alloy by Multi-phase-field Model Coupled with CALPHAD
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DOI：
10.2355/isijinternational.49.1019
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发表时间：
2009-01-01
影响因子：
1.8
通讯作者：
Nakajima, Keiji
中科院分区：
文献类型：
--
作者：
Nomoto, Sukeharu;Minamoto, Satoshi;Nakajima, Keiji
采用多相场法和相图计算（CALPHAD），结合热力学和扩散数据库，对Al-Ti-B和Al-Si-Ti-B系的等轴凝固过程进行了研究。在计算中，在潜热的基础上考虑了粒子的发散现象，并用实验数据进行了校正，得到了粒子密度-半径分布图。计算出的凝固晶粒尺寸与实验测量的各种hypoperidum组合物的定量一致。
The multi-phase field method and CALPHAD (calculation of phase diagram) are applied to the study of the equiaxed solidifications in the Al-Ti-B and Al-Si-Ti-B systems by coupled with thermodynamic and diffusion databases. In these calculations, recalescence phenomenon is considered on the basis of the latent heat, and a plot of the seed density-radius distribution is obtained by calibration with experimental data. The calculated solidified-grain sizes are in quantitative agreement with the experimental measurements for various hypoperitectic compositions.