摘要
在BCS-50AR万能薄板试验机上,测试连铸连轧AZ31镁合金板在室温、150℃2、00℃、300℃和450℃时的杯突值(IE值)。结果表明,随着温度升高,板材的IE值逐渐增加:在150℃以下,IE值随温度升高而缓慢增加;在150℃以上,IE值随温度的变化明显增加,满足关系式:IEh=-2.08595+0.03648T。在试验基础上模拟了杯突试验,提出并采用减薄率准则讨论了板材厚度对IE值的影响,预测了开裂的部位。结果表明,随着板材厚度增加,IE值随之增加;预测的开裂部位与试验结果一致。
The cupping values（IE value） of AZ31 magnesium alloy sheets have been tested on BCS-50AR general sheet metal tester at room temperature,150℃,200 ℃,300℃ and 450℃.The experimental data indicated that the IE value increased gradually with the increase of temperature.Especially,when the temperature was higher than 150℃,the IE value increased rapidly with the ascension of testing temperature and the relationship of IE value and temperature was IEh=-2.085 95＋0.036 48T.In this paper,the erichsen test was simulated by FE code. During the simulation, the reduction rate criterion was proposed to discuss the influence of sheet thickness on the IE value and to predict the fracture initiation position. The result showed that the IE value decreased with the decrease of sheet thickness and the predicted fracture initiation position was in agreement with the experimental results.
出处
《轻合金加工技术》
CAS
北大核心
2009年第10期34-38,共5页
Light Alloy Fabrication Technology
基金
国家自然科学基金项目(50775211)资助
关键词
AZ31镁合金
杯突值
开裂准则
数值模拟
AZ31 magnesium alloy
IE value
fracture criterion
numerical simulation
