Effect of Temperature on Material Transfer Behavior at Different Stages of Friction Stir Welded 7075-T6 Aluminum Alloy

查看全文 作　　者：[1]S.D.Ji;[1]Y.Y.Jin;[1]Y.M.Yue;[1]S.S.Gao;[2]Y.X.Huang;[1]L.Wang

机构地区：[1]Faculty of Aerospace Engineering,Shenyang Aerospace University;[2]State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology

出　　处：《Journal of Materials Science & Technology》索引2013年第29卷第10期,共6页

基　　金：the National Natural Science Foundation of China (No.51204111);the Education Department Foundation of Liaoning Province (No.L2012047);the State Key Lab of Advanced Welding and Joining in Harbin Institute of Technology (AWJ-M13-07) 摘　　要：In this work,the morphologies of weld of 7075-T6 aluminum alloy via friction stir welding(FSW) were analyzed by optical microscopy,the temperature field was attained by numerical simulation,and the effect of temperature on material transfer behavior in the thermal-mechanical affected zone(TMAZ) at different stages was mainly investigated.The FSW process consists of three stages.It is very interesting to find that the maximum transfer displacement of material appears at the final stage of welding process,then at the stable stage and at the initial stage,which results from the difference of peak temperatures at different stages.At any stage,the material in TMAZ near the surface of weld transfers downwards,the material in the middle of weld moves upwards and the material near the bottom of weld hardly moves.In any cross section of weld,the largest transfer displacement of material appears in the middle of weld.The increase of rotational velocity and the decrease of welding speed are both beneficial to the transfer displacement of material in the middle of weld. 关键词：摩擦搅拌焊接材料转移温度场铝合金行为焊缝形貌转让焊缝移动

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Effect of Temperature on Material Transfer Behavior at Different Stages of Friction Stir Welded 7075-T6 Aluminum Alloy

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