首页|A novel seal-flow multi-vortex friction stir lap welding of metal to polymer matrix composites
A novel seal-flow multi-vortex friction stir lap welding of metal to polymer matrix composites
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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 SM-FSLW 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 interlock-ings 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 poly-mer with the excellent formation and high strength.
Friction stir lap weldingMetal to polymerMulti-step pinMaterial flowTensile shear strength
Shuaiqiang NIAN、Mingshen LI、Shude JI、Wei HU、Zhiqing ZHANG、Zelin SUN
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College of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China
State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,China
National Natural Science Foundation of ChinaAeronautical Science Foundation of China
NETL
NSTL
万方数据
维普
