金属凝固微观组织形成的数值模拟

杨付双; 倪锋; 段宗银; 张金标; 张红云; 罗来辉; 徐向棋

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金属凝固微观组织形成的数值模拟
Numerical Simulation of Microstructure Formation in Metal Solidification
2007年第8期页码：589-592
纸质出版日期： 2007 ，
DOI：

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[1]杨付双,倪锋,段宗银,张金标,张红云,罗来辉,徐向棋.金属凝固微观组织形成的数值模拟[J].特种铸造及有色合金,2007(08):589-592+570.

Yang Fushuang1, Ni Feng2, Duan Zongyin1, et al. Numerical Simulation of Microstructure Formation in Metal Solidification[J]. Special Casting & Nonferrous Alloys, 2007,(8):589-592.
[1]杨付双,倪锋,段宗银,张金标,张红云,罗来辉,徐向棋.金属凝固微观组织形成的数值模拟[J].特种铸造及有色合金,2007(08):589-592+570. DOI：

Yang Fushuang1, Ni Feng2, Duan Zongyin1, et al. Numerical Simulation of Microstructure Formation in Metal Solidification[J]. Special Casting & Nonferrous Alloys, 2007,(8):589-592. DOI：

摘要

依据金属凝固的基本理论

在Oldfield的连续形核和晶粒长大模型基础上

引入了时间因子

运用随机方法

建立了连续冷却条件下形核和生长的随机模型

使形核和生长模型函数与时间直接相关

反映了连续冷却条件下的金属凝固微观组织的演化过程。基于上述模型

编制了计算模拟程序

模拟了Zn-5Al共晶合金微观组织的凝固过程

并用试验结果对模拟结果进行了验证对比

模拟结果与试验结果基本相符。

Abstract

A stochastic model of nucleation and growth has been established with continuous cooling

in which time factor is taken into consideration to generate the direct relativity of time with the function of nucleation and growth model

based on the Oldfield continuum nucleation and growth model by means of basic theory on metal solidification to simulate the evolution of metal microstructure during solidification process. The microstructure evolution of eutectic Zn-5Al alloy has been simulated by the model

and the verification experiment has been performed. The results show that the simulated results are well in agreement with the experimental ones

revealing the availability of the model.