共查询到18条相似文献,搜索用时 156 毫秒
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凝固过程中固液界面形态对凝固组织有着决定性作用,针对微观组织数值模拟研究,相场法可以很好地展示凝固过程固液界面形态的演变.在调研和查阅了大量资料的基础上,着重介绍了相场法数值模拟的基本原理及其在定向凝固的微观组织模拟国内外研究概况;最后,分析了相场模型的不足并指出了该领域研究中亟需解决的问题及其发展方向. 相似文献
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相场法凝固组织模拟的研究进展 总被引:1,自引:0,他引:1
阐述了相场法是一种用于模拟凝固微观组织的有效方法 ,是目前国内外的研究热点 ;论述了相场法模拟凝固微观组织的原理和国内外的研究现状 ,并指出进一步研究的方向。 相似文献
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相场模型及其在凝固组织模拟中的研究进展 总被引:2,自引:0,他引:2
相场法作为一种模拟凝固微观组织的有效方法,是目前研究的热点.对相场模型的基本原理、数值计算方法以及在凝固组织模拟中的研究进展进行了综述,提出了相场模型在微观组织模拟中存在的主要问题以及今后的发展方向. 相似文献
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用凝固过程数值模拟技术预测铸件的晶粒组织,进而预测铸件力学性能已成为国内外铸造领域的研究热点;简叙微观模拟的3种数值方法,其中相场法是一种三维微观组织模拟方法;论述了相场法模拟凝固微观组织的原理及其与外部场的耦合;指出其研究方向. 相似文献
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相场模拟对流影响凝固组织形成的研究进展 总被引:2,自引:0,他引:2
相场法是模拟对流影响凝固组织形成的有效方法,本文介绍了在纯扩散相场模型中引入对流的两种方法:“粘度函数”引入法和“变化界面应力”引入法以及所建立的耦合对流的相场模型,概述了相场法在模拟凝固组织形成中的对流效应的应用和进展,指出了该领域目前面临的问题和未来发展趋势. 相似文献
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During the last decade, the phase-field method has emerged in many fields if materials science as a powerful tool to simulate
and predict complex microstructure development. In this study, the microstructure changes during thermomagnetic treatment
and step aging of the Fe−Cr−Co magnetic alloy are modeled using phase-field methods. Using phase-field simulation, the model
reasonably represented microstructural changes in the Fe−Cr−Co system quantitatively. In particular, it is shown that gradual
step aging is important to obtain the lamellar microstructure that provides excellent permanent magnetic properties. Modeling
of microstructure development with the framework of the phase-field method is shown to be a very effective strategy to predict
and analyze complex microstructure formation.
This paper was presented at the International Symposium on User Aspects of Phase Diagrams, Materials Solutions and Exposition,
Columbus, Ohio, 18–20 October, 2004. 相似文献
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An expression for anisotropic interfacial energy of hexagonal close-packed metals has been formulated which is able to reproduce published data obtained using the modified embedded-atom method, covering the variation in interface energy as a function of orientation for a number of metals. The coefficients associated with the expression can be determined fully by measured or calculated interfacial energies of just three independent crystal planes. Three-dimensional phase-field model simulations using this representation of interfacial energy have been found to yield convincing crystal morphologies. The apparent rate of crystal growth as a function of orientation in the phase-field simulation agrees with predictions made by surface energy theory. 相似文献
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