材料工程Issue(1)：66-70,76,6.
不同应变率下MgAlZnY合金的拉伸性能与断口研究
Tensile Property and Fracture Surface for MgAlZnY Alloys at Different Strain Rates
摘要
Abstract
The tensile tests were conducted at room temperature using material test machine. The sensitivity of flow strength to strain rate was researched at strain rates of 0.001, 0.1, 0.6s-1 for Mg3Al1Zn2Y, Mg3Al2Zn2Y and Mg3A16Zn2Y. The sensitivity sequence of flow strength is Mg3A12Zn2Y ＞ Mg3Al1Zn2Y＞Mg3Al6Zn2Y. The rupture characteristics of magnesium alloys were described based on the fractal theory and technology of computer image disposal combined with scanning electron microscope. The results show that the fractal behavior of the alloys' fracture surface is remarkable. The brittleness, plasticity and the appearance of fracture surface can be related by the fractal dimension. The higher the fractal dimension, the better the alloy's plasticity, the more complex the fracture surface and the alloy inclines to ductile rupture. The sensitivity sequence of fracture surface to strain rate is Mg3Al2Zn2Y＞ Mg3A16Zn2Y＞Mg3Al1Zn2Y with positive or negative effect.关键词
镁合金/应变率/断口/分形维数Key words
magnesium alloy/ strain rate/ fracture surface/ fractal dimension分类
矿业与冶金引用本文复制引用
梁浩,陈勇梅,胡文军,丰杰,谭云..不同应变率下MgAlZnY合金的拉伸性能与断口研究[J].材料工程,2012,(1):66-70,76,6.基金项目
中国工程物理研究院科学技术发展基金(2010B0302041) （2010B0302041）
