A novel seal-flow multi-vortex friction stir lap welding of metal to polymer matrix composites

查看全文 作　　者：Shuaiqiang [1]NIAN;Mingshen [2]LI;Shude [1]JI;Wei [1]HU;Zhiqing [1]ZHANG;Zelin [1]SUN

机构地区：[1]College of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China;[2]State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Chinese Journal of Aeronautics》索引2024年第37卷第1期,共12页

基　　金：supported by the National Natural Science Foundation of China(No.52174366);Aeronautical Science Foundation of China(No.2020Z048054002)。 摘　　要：The friction stir lap welding(FSLW)of metal to polymer is a challenging work due to the unavoidable polymer overflowing.Facing this problem,a novel seal-flow multi-vortex friction stir lap welding(SM-FSLW)technology based on the subversively-designed multi-step pin was put forward.Choosing 7075 aluminum alloy and short glass fiber-reinforced polyether ether ketone(PEEK)as research subjects,the welding temperature,material flow,formation and tensile shear strength of dissimilar materials lap joint under the SM-FSLW were studied and compared with those under traditional FSLW based on the conical pin.The multi-step pin rather than the conical pin effectively hindered the polymer overflowing due to the formation of vortexes by the step,thereby attaining a joint with a smooth surface.Compared with traditional FSLW,the SMFSLW obtained the higher welding temperature,the more violent material flow and the larger area with high flow velocity,thereby producing the macro-mechanical and micro-mechanical interlockings and then heightening the joint loading capacity.The tensile shear strength of lap joint under SM-FSLW was 27.8% higher than that under traditional FSLW.The SM-FSLW technology using the multi-step pin provides an effective way on obtaining a heterogeneous lap joint of metal to polymer with the excellent formation and high strength. 关键词：Friction stir lap welding Metal to polymer Multi-step pin Material flow Tensile shear strength

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A novel seal-flow multi-vortex friction stir lap welding of metal to polymer matrix composites

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