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| 1 | Al-Mg-Si-Mn-Fe系合金均匀化过程中的显微组织演化:数值模拟与实验结果对比(英文)显示文摘通过数值模拟和实验相结合的方法,对Al-Mg-Si-Mn-Fe(AA6xxx)系合金均匀化过程中的显微组织演化进行研究。所应用的数学模型是结合CALPHAD及基于AA3xxx(Al-Mn-Fe-Si)系合金均匀化热处理而开发的。而后对此模型进行修正,以使得其应用拓展到更为复杂的AA6xxx系合金。该热处理模型可以预测包括溶质元素分布、初生相类型与比例、以及弥散相密度和尺寸分布在内的关键显微组织的演化。实验方面,对3种不同锰含量的AA6xxx系合金进行均匀化热处理。应用扫描电子显微镜、EPMA、XRD和电阻率等实验手段对所得均匀化组织进行多角度表征。预测结果与实验表征的对比表明,数学模型可以较为准确地反映均匀化过程中显微组织的演化。 | C.L.LIU H.AZIZI-ALIZAMINI N.C.PARSON W.J.POOLE Q.DU | 2017 | Transactions of Nonferrous Metals Society of China2017，27，4： | 5 |
| 2 | On mesh geometry and stiffness matrix conditioning for general finite element spaces显示文摘 | Q.Du D. Wang L. Y. Zhu | | 0，，02： | 1 |
| 3 | 查看详情显示文摘 | M.Zheng G.Ji Y.Wang J.Cao S.Feng L.Liao Q.Du L.Zhang Z.Ling J.Liu T.Yu J.Cao J.Tao | | 0，，： | 1 |
| 4 | Coarsening Kinetics of a Two Phase Mixture with Highly Disparate Diffusion Mobility显示文摘The coarsening kinetics of a two-phase mixture with a large diffusional mobility disparity between the two phases is studied using a variable-mobility Cahn Hilliard equation.The semi-implicit spectral numerical technique was employed,and a number of interpolation functions are considered for describing the change in diffusion mobility across the interface boundary from one phase to another.The coarsening rate of domain size was measured using both structure and pair correlation functions as well as the direct computation of particle sizes in real space for the case that the coarsening phase consists of dispersed particles.We discovered that the average size(R)versus time(t)follows the R^(10/3)∝t law,in contrast to the conventional LSW theory,R^(3)∝t,and the interface-diffusion dominated two-phase coarsening,R^(4)∝t. | G.Sheng T.Wang Q.Du K.G.Wang Z.K.Liu L.Q.Chen | 2010 | Communications in Computational Physics2010，8，7： | 0 |
| 5 | A Fourier Spectral Moving Mesh Method for the Cahn-Hilliard Equation with Elasticity显示文摘In recent years,Fourier spectral methods have emerged as competitive numerical methods for large-scale phase field simulations of microstructures in computational materials sciences.To further improve their effectiveness,we recently developed a new adaptive Fourier-spectral semi-implicit method(AFSIM)for solving the phase field equation by combining an adaptive moving mesh method and the semi-implicit Fourier spectral algorithm.In this paper,we present the application of AFSIM to the Cahn-Hilliard equation with inhomogeneous,anisotropic elasticity.Numerical implementations and test examples in both two and three dimensions are considered with a particular illustration using the well-studied example of mis-fitting particles in a solid as they approach to their equilibrium shapes.It is shown that significant savings in memory and computational time is achieved while accurate solutions are preserved. | W.M.Feng P.Yu S.Y.Hu Z.K.Liu Q.Du L.Q.Chen | 2009 | Communications in Computational Physics2009，5，2： | 0 |
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