Mechanism of ultrasound-assisted transient liquid phase bonding of magnesium alloy with Ni interlayer

被引：0
|
作者：
Li Y.-N. [1 ]
Yang C.-F. [1 ]
Yan J.-C. [2 ]
Peng Z.-L. [1 ]
机构：
[1] School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao
[2] State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin
来源：
Peng, Zi-Long (pengzilong@qut.edu.cn) | 1600年 / Central South University of Technology卷 / 30期
基金：
中国国家自然科学基金;
关键词：
Magnesium alloy; Mechanical property; Microstructure; Transient liquid phase bonding; Ultrasonic assistance;
D O I：
10.11817/j.ysxb.1004.0609.2020-39504
中图分类号：
学科分类号：
摘要：
In order to research the effect of ultrasonic processing time on the microstructures and mechanical properties of magnesium alloy joint, ultrasonic-assisted transient liquid phase bonding (U-TLP) of MB8 magnesium alloy was carried out with a pure nickel interlayer. The results show that the oxide film on the surface of Mg alloy is successfully removed at 520 ℃ within ultrasonic processing time of 10 s. With the prolongation of the ultrasonic processing time, a eutectic reaction between Ni foil and Mg base metal proceeds and the Ni foil is consumed gradually. The α-Mg+Mg2Ni eutectic products begin to increase at first and then are extruded under the static pressure of sonotrode and ultrasonic sound flow effect. When the ultrasonic processing time is 30 s, as the Mg2Ni which is easy to make the joint brittle is extruded, the brazing seam is mainly composed of magnesium-based solid solution. At this time, the joint shear strength increases to the maximum of 107 MPa, reaching 102% of that of the base metal, and the fracture is along the α-Mg solid solution in brazing seam. © 2020, Science Press. All right reserved.
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页码：1065 / 1072
页数：7
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