Crack behavior in Mg/Al alloy thin sheet during hot compound extrusion

查看全文 作　　者：Kun [1,2]Sheng;Liwei [1,2,3]Lu;Yao [2]Xiang;Min [2,3]Ma;Zhiqiang [2,3]Wu

机构地区：[1]Hunan Provincial Key laboratory of High Efficiency and Precision Machining of Difficult-to-Cut Material,Hunan University of Science and Technology,Xiangtan,Hunan 411201,PR China;[2]College of Materials Science and Engineering,Hunan University of Science and Technology,Xiangtan,Hunan 411201,PR China;[3]Hunan Provincial Overseas-wisdom Innovation Center of New Energy Vehicle in Industrial-Academic-Research Cooperation,Hunan University of Science and Technology,Xiangtan,Hunan 411201,PR China

出　　处：《Journal of Magnesium and Alloys》索引2019年第7卷第4期,共8页

基　　金：This work was partly supported by National Natural Science Foundation of China(Grant nos.51975207&51728202);Hunan Provincial Natural Science Foundation for Excellent Young Scholars of China(Grant no.2019JJ30010);the Scientific Research Fund of Hunan Provincial Education Department(Grant No.17B089);the Hunan Provincial Research and Innovation Project for postgraduate(Grant No.CX2018B696). 摘　　要：A novel and effective method to co-extrude metallic alloys is described which named Direct Extrusion and Bending-Shear Deformation.The compound extrusion plates have cracked at 290℃ and 3 mm/s.According to this phenomenon,a model was built to investigate the crack generation and development between the 6061 Al and AZ31 Mg alloy during the compound extrusion process by DEFORM-3D.The cracking behavior of the Mg/Al composite rod with a soft Mg AZ31 core and a hard Al 6061 sleeve were systematically studied to disclose the influence of microstructure on crack in the different regions.The simulation results show that the distribution of strain and velocity has significant differences due to the influence of dies structure and material properties at different locations in the same region.The experimental results show that in the same conditions,there are differences in recrystallization and texture weakening of AZ31 Mg alloys and 6061 Al alloy,which are important factors for the formation of crack.Both the Mg layer and the Al layer have a homogeneous microstructure in the region d. 关键词：AZ31 Mg alloy 6061 Al alloy Compound extrusion CRACK EBSD

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Crack behavior in Mg/Al alloy thin sheet during hot compound extrusion

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