Hot deformation behavior and processing maps of as-cast Mg-8Zn-1Al-0.5Cu-0.5Mn alloy  

铸态Mg-8Zn-1Al-0.5Cu-0.5Mn镁合金的热变形行为和热加工图（英文）

作　　者：朱绍珍 罗天骄[2] 张廷安[1] 杨院生[2] 

机构地区：[1]东北大学材料与冶金学院,沈阳110819 [2]中国科学院金属研究所,沈阳110016

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第10期3232-3239,共8页中国有色金属学报（英文版）

基　　金：Project(51274184)supported by the National Natural Science Foundation of China;Project(2013CB632205)supported by the National Basic Research Program of China

摘　　要：The hot deformation behavior of as-cast Mg-8Zn-1Al-0.5Cu-0.5Mn alloy was studied by hot compression tests at temperatures of 200-350 °C and strain rates of 0.001-1 s-1.The results show that the flow stress increases significantly with increasing strain rate,and decreases as the temperature increases.The flow stress model based on the regression analysis was developed to predict the flow behavior of Mg-8Zn-1Al-0.5Cu-0.5Mn alloy during the hot compression,and the model shows a good agreement with experimental results.Meanwhile,the processing maps were established according to the dynamic materials model.The processing maps show that the increase of strain enlarges the instability domains,and the alloy shows good hot workability at high temperatures and low strain rates.采用热压缩实验研究Mg-8Zn-1Al-0.5Cu-0.5Mn镁合金在温度为200~350°C、应变速率为0.001~1 s^-1条件下的热变形行为。结果表明,流变应力随着应变速率的增加而明显增大,随着变形温度的升高而减小。同时,采用回归分析的方法建立预测合金流变应力的模型,该模型与实验结果能较好地吻合。以动态材料模型为基础建立合金的热加工图,从加工图中可以看出,随着应变的增大,合金的非稳态区域变大,合金在高温和低应变速率下具有良好的加工性。

关 键 词：magnesium alloy hot deformation flow stress processing map dynamic recrystallization 

分 类 号：TG146.22[一般工业技术—材料科学与工程]