Dissimilar Al/Mg alloys friction stir lap welding with Zn foil assisted by ultrasonic
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2019年第8期
论文作者：Shude Ji Shiyu Niu Jianguang Liu
文章页码：1712 - 1718
摘 要：The Zn-added ultrasonic assisted friction stir lap welding（UaFSLW） was carried out to improve the quality of dissimilar Al/Mg alloys joint. The effects of ultrasonic power on the joint quality were also investigated.The results indicated that the larger effective lap width and mixing region between Mg and Al（Mg/Al MR） were attained by Zn foil addition and external ultrasonic assistance. Compared with the conventional joint, the finer and better-distributed Mg-Zn IMCs placing the continuous Al-Mg IMCs were formed in the Mg/Al MR of the Zn-added UaFSLW joint. The Zn foil addition and external ultrasonic assistance significantly improved the tensile shear load of the joint, and the load was increased with the increase of the ultrasonic power. The maximum tensile shear load of 7.95 kN was attained, which was 52.6% larger than that of the conventional joint.
Shude Ji1，Shiyu Niu1，Jianguang Liu2
1. School of Aerospace Engineering,Shenyang Aerospace University2. Beijing Key Laboratory of Civil Aircraft Structures and Composite Materials,Beijing Aeronautical Science & Technology Research Institute of COMAC
摘 要：The Zn-added ultrasonic assisted friction stir lap welding（UaFSLW） was carried out to improve the quality of dissimilar Al/Mg alloys joint. The effects of ultrasonic power on the joint quality were also investigated.The results indicated that the larger effective lap width and mixing region between Mg and Al（Mg/Al MR） were attained by Zn foil addition and external ultrasonic assistance. Compared with the conventional joint, the finer and better-distributed Mg-Zn IMCs placing the continuous Al-Mg IMCs were formed in the Mg/Al MR of the Zn-added UaFSLW joint. The Zn foil addition and external ultrasonic assistance significantly improved the tensile shear load of the joint, and the load was increased with the increase of the ultrasonic power. The maximum tensile shear load of 7.95 kN was attained, which was 52.6% larger than that of the conventional joint.
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