Prediction of edge cracks and plastic-damage analysis of Mg alloy sheet in rolling  

镁合金板材轧制边裂的预测和流变-损伤分析(英文)

作　　者：张丁非[1,2] 戴庆伟[1,2] 方霖[1,2] 徐杏杏[1,2] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045 [2]重庆大学国家镁合金材料工程技术研究中心,重庆400044

出　　处：《Transactions of Nonferrous Metals Society of China》2011年第5期1112-1117,共6页中国有色金属学报（英文版）

基　　金：Project (2007CB613700) supported by the National Basic Research Program of China; Project (2007BAG06B04) supported by the National Sci & Tech Support Program, China; Project (CSTC, 2009AB4008) supported by Chongqing Sci & Tech Program, China; Project (50725413) supported by the National Natural Science Foundation of China

摘　　要：A thermal-mechanical-damage coupled finite elements model was established to investigate temperature changes, edge cracks and rolling force during roiling of magnesium alloy sheet. A cuneal sheet was also adopted to study the influence of reduction on temperature, damage and rolling force. The results show that with increasing the reduction, the rolling force increases, and the temperature of the Mg sheet decreases. Edge cracks occur when the reduction is above 51.6%, with the damage value of above 0.49. The plastic-damage in Mg sheet rolling is a result of hole development, shearing deformation and accumulative plastic strain.研究镁合金板材轧制过程中的温度变化、边裂和轧制力,建立热-力-损伤耦合有限元模型。采用楔形试样研究压下量对温度、损伤和轧制力的影响。结果表明:随着压下量的增加,轧制力增大,镁板的温度降低;当压下量大于51.6%时,发生边裂,此时损伤值大于0.49;镁板轧制中的塑性?损伤是空洞发展、剪切变形和应变积累综合作用的结果。

关 键 词：magnesium alloys finite element analysis ROLLING DAMAGE 

分 类 号：TG339[金属学及工艺—金属压力加工]