Phase Field Method for Simulation of Solidification Microstructure of Molten Metal

Li Xinzhong  Guo Jingjie  Su Yanqing  Liu Chang  Wu Shiping  Fu Hengzhi

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Phase Field Method for Simulation of Solidification Microstructure of Molten Metal
Issue 4, Pages: 222-225(2005)
Published： 2005 ，
DOI：

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[1]李新中,郭景杰,苏彦庆,刘畅,吴士平,傅恒志.金属熔体凝固微观组织模拟的相场方法研究[J].特种铸造及有色合金,2005(04):222-225+190.

Li Xinzhong Guo Jingjie Su Yanqing Liu Chang Wu Shiping Fu Hengzhi. Phase Field Method for Simulation of Solidification Microstructure of Molten Metal. [J]. Special Casting & Nonferrous Alloys (4):222-225(2005)
[1]李新中,郭景杰,苏彦庆,刘畅,吴士平,傅恒志.金属熔体凝固微观组织模拟的相场方法研究[J].特种铸造及有色合金,2005(04):222-225+190. DOI：

Li Xinzhong Guo Jingjie Su Yanqing Liu Chang Wu Shiping Fu Hengzhi. Phase Field Method for Simulation of Solidification Microstructure of Molten Metal. [J]. Special Casting & Nonferrous Alloys (4):222-225(2005) DOI：

摘要

全面阐述了现有的金属熔体凝固微观组织模拟的相场模型:纯物质、二元合金理想溶液或正规溶液和稀溶液相场模型

指出构造适合于具有复杂溶液模型的金属熔体凝固微观组织模拟相场模型的必要性。提出采用相图计算热力学模型构造相场模型中的体系自由能

并对相场参数做出相应修正

建立了能对具有复杂溶液模型的金属熔体凝固微观组织进行准确模拟的相场模型。利用该相场模型对Ti Al金属熔体中晶体的自由生长和定向生长进行了模拟

得到许多与试验观察和理论分析相一致的结果。

Abstract

The existing phase-field models for simulation of solidification microstructures of metal melt are described comprehensively including the phase-field of pure materials

binary alloy with ideal solution model or regular solution model and dilute model.The necessity of establishing the phase-field model for simulation of solidification microstructures of the alloy with complex solution patterns is pointed out.It is proposed that the phase diagram may be used to establish volume free energy of phase field model for thermodynamic model calculation correspondingly parameters of phase field are corrected so that the accurate simulation of phase field model for solidificaion microstructure of complex metallic melt has been built up.The developed phase field model can be used to simulate both free growth and directional growth in Ti-Al metallic melt.A lot of results obtained are well in agreement with ones from experimental observation and theoretical analysis.