Study of θ’ precipitation behavior in Al-Cu-Cd alloys by phase-field modeling
Study of θ’ precipitation behavior in Al-Cu-Cd alloys by phase-field modeling
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相场模拟研究 Al-Cu-Cd 合金中的 α 析出行为
DOI：
10.1016/j.msea.2019.01.012
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发表时间：
2019-02
期刊：
影响因子：
--
通讯作者：
Long-Qing Chen
中科院分区：
文献类型：
--
作者：
Yisen Hu;Gang Wang;Yanzhou Ji;Liping Wang;Yiming Rong;Long-Qing Chen
通过相场模拟研究了 Al-Cu-Cd 合金的 θ'(Al2Cu) 析出行为。由于Cu-Cd-空位团簇的形成，Cu在Al基体中的扩散被团簇的移动所取代。因此对扩散模型进行了修改，新模型中采用了Cu-Cd-空位团簇的扩散系数。此外，Cd原子在α(Al)/θ’界面偏析降低了θ’相的界面能。因此，在模拟中比较了相干和半相干界面能的多种组合关于θ'相的生长动力学。结果表明，θ’相径厚比的变化主要取决于相干界面能。平衡直径是直径-厚度比的单调递增函数。通过比较相场模拟和实验数据之间的直径厚度比，获得了适当的相干和半相干界面能。屈服强度的计算考虑了 θ’ 相的形态，并通过不同 Al-Cu-Cd 合金的实验结果进行了验证。
The θ’(Al2Cu) precipitation behavior of Al-Cu-Cd alloys was investigated by phase-field simulations. Due to the formation of Cu-Cd-vacancy clusters, the diffusion of Cu in the Al matrix is replaced by the movement of the clusters. Thus the diffusion model was modified and the diffusion coefficient of Cu-Cd-vacancy clusters was used in the new model. Moreover, the interfacial energy of θ’ phase is reduced by the Cd atoms segregation at the α(Al)/θ’ interface. Therefore, multiple combinations of coherent and semi-coherent interfacial energies were compared regarding the growth kinetics of θ’ phase in the simulation. The results indicated that the variation of the diameter-to-thickness ratio of θ’ phase primarily depended on the coherent interfacial energy. And the equilibrium diameter was a monotonically increasing function of the diameter-thickness ratio. Appropriate coherent and semi-coherent interfacial energies were obtained based on a comparison of the diameter-thickness ratio between the phase-field simulations and experimental data. The yield strength was calculated considering the morphology of the θ’ phases and was validated by experimental results for different Al-Cu-Cd alloys.
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DOI：
10.1051/jphyscol:1977709
发表时间：
1977-12
期刊：
Le Journal De Physique Colloques
影响因子：
--
作者：
J. Cahn;S. Allen
通讯作者：
J. Cahn;S. Allen
影响因子：
8.6
作者：
V. Vaithyanathan;Christopher M Wolverton;Long-Qing Chen
通讯作者：
V. Vaithyanathan;Christopher M Wolverton;Long-Qing Chen
影响因子：
9.4
作者：
Zhang F;Levine LE;Allen AJ;Campbell CE;Creuziger AA;Kazantseva N;Ilavsky J
通讯作者：
Ilavsky J
DOI：
10.2464/jilm.22.10_599
发表时间：
1972-10
期刊：
Journal of Japan Institute of Light Metals
影响因子：
--
作者：
寿子 鈴木;幹宏 菅野;和義 福永
通讯作者：
寿子 鈴木;幹宏 菅野;和義 福永
DOI：
10.1016/0001-6160(67)90071-5
发表时间：
1967-11
期刊：
Acta Metallurgica
影响因子：
--
作者：
J. Nuyten
通讯作者：
J. Nuyten