Numerical simulation and experimental study on cavity growth in uniaxial tension of superplastic magnesium alloy

来源期刊：中国有色金属学报(英文版)2003年第3期

论文作者：于彦东 张凯锋 郑海荣 蒋大鸣

文章页码：622 - 625

Key words：cavity growth; numerical simulation; uniaxial tension; superplastic magnesium alloy

Abstract: The cavity growth was studied in uniaxial tension of superplastic magnesium alloy. An exponentially increasing cavity growth model was introduced into the numerical simulation effectively. A three-dimensional rigid visco-plastic finite element method (FEM) program was developed to predict the variation of radius and volume fraction of cavity. Experimental radius and volume fraction of cavity were determined based on the optical microscope observation and analyses. The values obtained by numerical simulation are perfectly in agreement with experimental results. The results are potentially helpful to designing the optimal processing parameters for superplastic forming of materials and to enhance their subsequent mechanical properties.