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

作     者：Shuaiqiang NIAN Mingshen LI Shude JI Wei HU Zhiqing ZHANG Zelin SUN Shuaiqiang NIAN;Mingshen LI;Shude JI;Wei HU;Zhiqing ZHANG;Zelin SUN

作者机构：College of Aerospace EngineeringShenyang Aerospace UniversityShenyang 110136China State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbin 150001China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2024年第37卷第1期

页      面：451-462页

核心收录：

学科分类：08[工学] 082503[工学-航空宇航制造工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0825[工学-航空宇航科学与技术] 

基　　金：supported by the National Natural Science Foundation of China(No.52174366) Aeronautical Science Foundation of China(No.2020Z048054002) 

主　　题：Friction stir lap welding Metal to polymer Multi-step pin Material flow Tensile shear strength 

摘      要：The friction stir lap welding(FSLW)of metal to polymer is a challenging work due to the unavoidable polymer *** 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 *** 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 *** 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 *** 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 *** tensile shear strength of lap joint under SM-FSLW was 27.8% higher than that under traditional *** 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.