基于SVM模型的AZ31合金成型工艺与性能研究  

Forming Process and Properties of AZ31 Alloy Based on SVM Model

作　　者：张千锋[1] 陈秋萍[1] 颜晓娟[1] ZHANG Qianfeng CHEN Qiuping YAN Xiaojuan(School of Mechanical and Marine Engineering, Qinzhou University in Guangxi, Qinzhou 535099, Chin)

机构地区：[1]广西钦州学院机械与船舶海洋工程学院,广西钦州535099

出　　处：《铸造技术》2017年第4期788-791,共4页Foundry Technology

基　　金：广西教育厅基金资助项目(项目号:KY2015YB312);钦州学院校级科研项目(项目号:2014XJKY-30B)

摘　　要：对平行于板面方向(RD)、成45°方向和垂直于板面方向(TD)成型的AZ31合金板材的金相组织和常温力学性能进行了分析,并基于SVM模型得到了AZ31合金板材的成型极限图。结果表明,随着成型方向从TD方向转向RD方向的过程中,AZ31合金板材中的挛晶数量有逐渐降低的趋势;沿着RD方向成型的板材在RD方向的n值最大,45°方向的r值最小;沿着TD方向成型的板材,在取样方向从TD转向RD过程中,n值逐渐降低,在TD方向取得r最小值;沿着45°方向成型的板材,在取样方向为45°方向时取得n的最小值和r最大值。SVM模型可以较好地预测AZ31合金板材在拉伸状态下的成型极限。The microstructure and mechanical properties of AZ31 alloy sheets were studied under different forming direction, such as parallel to plate direction （RD）, 45° direction and vertical to plate direction （TD）, and the forming limit diagram of AZ31 alloy sheet was obtained based on SVM model. The results show that with the molding direction changing from the TD direction to RD of AZ31 alloy sheet, the number of twins have gradually decreasing trend. The molding plate has the maximum n value in the RD direction, and gets minimum r value in the 45° direction. Along the TD direction forming, when the direction change from TD to RD, the n value of forming sheet decreases gradually, and the minimum r value can achieved in the transverse direction （TD）. SVM model can be used to predict the forming limit of AZ31 alloy sheet in tension state.

关 键 词：SVM模型 AZ31合金 成型 方向 性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]