电焊机2025，Vol.55Issue(12)：26-31,38,7.DOI:10.7512/j.issn.1001-2303.2025.12.04
Ag中间层对铝/铜异种金属超声波焊接接头微观组织及力学性能的影响
Effect of Adding Silver Interlayer on Microstructure and Mechanical Properties of Al-Cu Ultrasonic Welding Joint
GUO Zhe 1LIU Fei 1PANG Lihui 1WANG Peifeng1
作者信息
- 1. School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China
- 折叠
摘要
Abstract
To address the issue of performance degradation in Al/Cu dissimilar ultrasonic welding joints caused by the for-mation of brittle intermetallic compounds,silver(Ag)powder was employed as an interlayer to join 1.5 mm thick 1060 alu-minum alloy and 0.5 mm thick T2 copper via ultrasonic lap welding(welding time:0.4 s).The effect of the Ag interlayer on the microstructure and mechanical properties of the joint was systematically investigated.The results indicate that without the interlayer,an intermetallic compound layer(primarily AlCu and Al4Cu9)approximately 0.5 μm thick forms at the inter-face,and the joint exhibits an average tensile shear strength of 43.0 MPa.After introducing the Ag powder interlayer(par-ticle size:20 μm),material flow at the interface intensifies,promoting the formation of Ag-based solid solutions(e.g.,Ag0.803Al0.197)and Al-based solid solutions,while effectively suppressing the generation of brittle intermetallic compounds.Consequently,the average tensile shear strength of the joint increases to 46.0 MPa,representing an improvement of 5.7%.Fracture analysis reveals that the addition of the Ag interlayer changes the fracture mode from a quasi-cleavage and dimple composite type to a dimple-dominated ductile fracture.This study confirms that the Ag interlayer significantly enhances the mechanical properties of Al/Cu ultrasonic welding joints by promoting solid solution formation and optimizing the interfa-cial structure.关键词
铝/铜异种金属/超声波焊接/中间层/微观组织/固溶体Key words
aluminum/copper dissimilar metals/ultrasonic welding/interlayer/microstructure/solid solution分类
矿业与冶金引用本文复制引用
GUO Zhe,LIU Fei,PANG Lihui,WANG Peifeng..Ag中间层对铝/铜异种金属超声波焊接接头微观组织及力学性能的影响[J].电焊机,2025,55(12):26-31,38,7.
