摘要
通过研究半固态材料的细观几何特征,获得其特征参数的统计规律,并以半固态Al-4Cu-Mg合金为例,建立其加热温度为540℃时的具有统计意义的细观特征模型。固相颗粒等效为正方颗粒,等效直径为30、50、70、90μm的固相颗粒个数n1、n2、n3和n4分别为9、12、3和1,运用有限元细观力学方法计算了细观特征模型的宏观力学响应,得到的最大流变应力为6.8MPa(试验值为6.5MPa),变形末段最小流变应力为1.1MPa(试验值为0.7MPa)。计算结果与实际结果吻合。
Statistic features of the parameters were obtained by analyzing meso-structure of the semi-solid materials. Meso-structure model exhibiting statistics was established for semi-solid Al-4Cu-Mg alloy with heating at 540℃.Macro-mechanical response of the semi-solid alloy was calculated by the finite element method based on the model. The calculated results show that the rheo-behavior of the semi-solid materials is well in agreement with actual one,meanwhile,the calculated value is accordant with the measured one in the range of error except.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2009年第8期706-708,共3页
Special Casting & Nonferrous Alloys
基金
安徽工程科技学院科研启动基金项目(2008YQ007)
安徽工程科技学院青年基金项目(2007YQ008zd)
关键词
半固态
细观结构
细观力学
力学响应
Semi-solid,Meso-structure,Micro-mechanical Properties,Mechanical Response
