Critical damage value of AZ31B magnesium alloy with different temperatures and strain rates

• 作者: Jing-Ren Dong Ding-Fei Zhang Yu-Feng Dong Fu-Sheng Pan Sen-Sen Chai
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 137-142
• 页数: 6页
• 语种: 英文

摘要

The uniaxial tensile tests were carried out at temperature ranging from room temperature(RT)to 523 K under strain rates of 0.001,0.010 and 0.100 s-1 to obtain the flow stress of AZ31B magnesium alloy.The tensile tests were simulated by the finite element method(FEM)to calculate the critical damage values(Dc)of the Cockcroft-Latham criterion to predict the occurrence of fracture defects.Finally,the effects of temperature and strain rate on Dc were analyzed to predict the critical damage value's evolution.The results demonstrate that the critical damage value changes in the range of 0.188-0.718.It increases as strain rate decreases at constant temperature,and increases with the increase of temperature under certain strain rate,but is more sensitive to the temperature.