Effects of key parameters on magnetic pulse welding of 5A02 tube and SS304 tube
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ORIGINAL ARTICLE
Effects of key parameters on magnetic pulse welding of 5A02 tube and SS304 tube Haiping Yu 1,2 & Haiqing Dang 2 & Yanan Qiu 2 & Wenzhong Zhang 3 Received: 19 May 2019 / Accepted: 1 September 2020 # Springer-Verlag London Ltd., part of Springer Nature 2020
Abstract The combination of collision velocity and angle plays a dominant role for the magnetic pulse welding (MPW) of dissimilar metals. During the MPW process of tubes, the combination depends on the key parameters including radial gap, relative lap length (RLL), and discharge voltage. In this work, the numerical simulations are performed to investigate the effects of RLL on the collision velocity and angle. MPW experiments of 5A02 aluminum tube and SS304 steel tube are conducted, and then, peeling tests and compression shear tests for the joints are carried out respectively to study the influence of these key parameters on the MPW joint quality. The simulation results reveal that the impact velocity declines with the enlargement of RLL but increases with the growth of radial gap and discharge voltage. And the collision angle decreases first sharply and then increases gently with the increase of RLL. And the angle also increases with the increasing radial gap but the discharge voltage seems to be less important. Comprehensively, it is found that there exists an optimum value 7/10 for RLL, 1.75 mm for the radial gap, and 16 kV for the discharge voltage to obtain the joints of good quality in this paper, whose shear strength’s maximum is up to 48.9 MPa. And the relationship between the radial gap and the voltage is found that the smaller the radial gap, the smaller the corresponding proper voltage for a good joint under the same experimental conditions. Keywords Magnetic pulse welding . Key parameters . Dissimilar tube . Collision velocity . Collision angle . Joint quality
1 Introduction One challenge in modern advanced manufacturing is how to realize lightweight structures and the recombination of properties using light materials, such as aluminum alloys and magnesium alloys, instead of steel. Precise technology is needed to complete the joining of dissimilar metal materials for the purpose of saving valuable metals, expanding the functions of the component, and reducing the weight of the structure [1]. However, brittle intermetallic compounds are easily formed in the melting zone of the dissimilar metals, and the strength of the parent metal in the heat-affected zone will be reduced
* Haiping Yu [email protected] 1
National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001, China
2
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
3
Capital Aerospace Machinery Corporation, Beijing 100076, China
due to the high-temperature thermal cycle in the fusion welding process. Mechanical fastening techniques, such as self-piercing riveting, offer ways to circumvent the issue of dissimilar welding, though usually with a cost penalty due to the cost
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