Process optimization on friction stir lap welding of 6061-T6 aluminum alloy/Q235 steel with ultrasonic vibration

被引：0
|
作者：
Liu T. [1 ]
Gao S. [1 ]
Xiao G. [1 ]
Wu C. [1 ]
Shi L. [2 ]
Sun Z. [1 ]
机构：
[1] Qilu University of Technology (Shandong Academy of Sciences), Jinan
[2] Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (MOE), Shandong University, Jinan
来源：
Hanjie Xuebao/Transactions of the China Welding Institution | 2022年 / 43卷 / 05期
关键词：
Aluminum/steel; Friction stir welding; Microstructure and properties; Ultrasonic energy; Welding loads;
D O I：
10.12073/j.hjxb.20220101007
中图分类号：
学科分类号：
摘要：
The effective connection between 6061-T6 aluminum alloy and Q235 steel was realized by ultrasonic vibration enhanced friction stir welding (UVeFSW) process. The effects of ultrasonic energy on weld formation, joint microstructure, mechanical properties and welding load were investigated. The results show that the application of ultrasonic energy can significantly improve the weld surface forming and expand the width of aluminum / steel interface zone and weld nugget zone. Ultrasonic energy refines the grain structure of weld nugget zone and thermal mechanically affected zone, changes the fracture mechanism and cracking location of lap joint, improves the mechanical properties of joint. The variation of welding loading during welding was analyzed. It is found that the tool torque, the welding axial force and the spindle power decrease after applying ultrasonic energy. Copyright © 2022 Transactions of the China Welding Institution. All rights reserved.
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页码：69 / 75
页数：6
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