Comparison of microstructures and mechanical properties of composite extruded AZ31 sheets  

作　　者：Yanfu Chai Yan Song Bin Jiang Jie Fu Zhongtao Jiang Qingshan Yang Haoran Sheng Guangsheng Huang Dingfei Zhang Fusheng Pan 

机构地区：[1]State Key Laboratory of Mechanical Transmissions,College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China [2]Chongqing Academy of Science and Technology,Chongqing 401123,China [3]Research Institute for New Materials Technology,Chongqing University of Arts and Sciences,Chongqing 402160,China [4]Shanghai Aerospace Equipment Manufactory,Shanghai 200245,China

出　　处：《Journal of Magnesium and Alloys》2019年第4期547-554,共8页镁合金学报（英文）

基　　金：The authors are grateful for the financial supports from the National Key Research and Development Program of China(2016YFB0301104 and 2016YFB0101700);Chongqing Science and Technology Commission(cstc2017zdcy-zdzxX0006,cstc2017jcyjAX0012,cstc2018jcyjAX0472);National Natural Science Foundation of China(51531002 and U1764253);Chongqing Scientific&Technological Talents Program(KJXX2017002);China Postdoctoral Science Foundation(2018T110948);Science and Technology Research Program of Chongqing Municipal Education Commission(KJQN201801306).

摘　　要：The microstructures and mechanical properties of the composite extruded AZ31/AZ31 and AZ31/4047 Al sheets were investigated and made a comparison to the conventional extruded AZ31 sheet.Owing to the introduced intense shear deformation at the interface during the composite extrusion,grain refinement and tilted texture were detected in AZ31 layers of the AZ31/AZ31 and AZ31/4047 Al sheets,while the conventional extruded AZ31 sheet exhibited a relative coarse,inhomogeneous microstructure and strong basal texture.The compressiontension yield ratio was increased gradually from the AZ31 to the AZ31/AZ31 and AZ31/4047 Al sheets.Besides,the AZ31/4047 Al sheet could successfully accomplish the whole bending forming process at room temperature,while the AZ31 and AZ31/AZ31 sheets were both bend-formed to failure with significant cracks in the outer tensile region under the identical bending parameters.Moreover,under the same bending strain,both the outward offset degree of strain neutral layer and the sheet thickening were more serious in the AZ31/4047 Al composite sheet than those of the AZ31 and AZ31/AZ31 sheets.The foremost reason was the quite wide gap of material properties between Mg alloy AZ31 layer(tensile loading in the outer region)and Al 4047 layer(compressive loading in the inner region).

关 键 词：Mg alloy sheet Composite extrusion Tension-compression yield asymmetry BENDABILITY 

分 类 号：TG1[金属学及工艺—金属学]