Current research developments of electromagnetic joining technology in China-A review

2021 ◽  
Vol 01 ◽  
Author(s):  
Yangfan Qin ◽  
Hao Jiang ◽  
Guangyao Li ◽  
Junjia Cui
Keyword(s):  
Lightweight Design ◽  
Dissimilar Materials ◽  
Development Trend ◽  
Research Progress ◽  
Material Structure ◽  
Magnetic Pulse ◽  
Factors Affecting ◽  
Joining Technology ◽  
Pulse Welding ◽  
Design And Manufacture

: With the increasing applications of multi-material structures in lightweight vehicle, traditional joining techniques are highly challenged in joining dissimilar materials. To meet the requirements of the multi-material structure of lightweight design, electromagnetic joining (EMJ) technology including electromagnetic riveting (EMR) and magnetic pulse welding (MPW) developed rapidly in recent years, which can achieve good connection performance for complex-shaped structures and dissimilar materials. This paper presents a comprehensive review of the research progress of the EMJ technology in China. Moreover, this review aims at providing a guideline for researchers engaged in electromagnetic joining technology and other connecting processes to further improve the level of lightweight vehicle design and manufacture. Firstly, the development history and status of EMJ was presented. Then the basic joining principles and characteristics of EMR and MPW were analyzed in detail. Subsequently, the investigation of joints formation mechanism, mechanical properties of joints and equipment development of EMR and MPW techniques were reviewed and analyzed. Especially, the operating principle is described along with various factors affecting the mechanical and microcosmic properties of joints. Finally, the future development trend of the EMJ technology based on the current research progress is highlighted.

scholarly journals Influence of Surface Preparation on the Interface of Al-Cu Joints Produced by Magnetic Pulse Welding

Metals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 997 ◽  
Author(s):  
Omid Emadinia ◽  
Alexandra Martins Ramalho ◽  
Inês Vieira de Oliveira ◽  
Geoffrey A. Taber ◽  
Ana Reis
Keyword(s):  
Tensile Testing ◽  
Dissimilar Materials ◽  
Surface Preparation ◽  
Target Material ◽  
Processing Parameters ◽  
Magnetic Pulse ◽  
Magnetic Pulse Welding ◽  
Surface Conditions ◽  
Comprehensive Evaluations ◽  
Pulse Welding

Magnetic pulse welding can be considered as an advanced joining technique because it does not require any shielding atmosphere and input heat similar to conventional welding techniques. However, it requires comprehensive evaluations for bonding dissimilar materials. In addition to processing parameters, the surface preparation of the components, such as target material, needs to be evaluated. Different surface conditions were tested (machined, sand-blasted, polished, lubricated, chemically attacked, and threaded) using a fixed gap and standoff distance for welding. Microstructural observations and tensile testing revealed that the weld quality is dependent on surface preparation. The formation of waviness microstructure and intermetallic compounds were verified at the interface of some joints. However, these conditions did not guarantee the strength.

Joining Dissimilar Materials by Magnetic Pulse Welding

2017 ◽  
Author(s):  
Chady Khalil ◽  
Yannick Amosse ◽  
Guillaume Racineux
Keyword(s):  
Dissimilar Materials ◽  
Magnetic Pulse ◽  
Magnetic Pulse Welding ◽  
Pulse Welding

scholarly journals Experimental investigation of the weldability of tubular dissimilar materials using the electromagnetic welding process

2017 ◽  
Vol 8 (1) ◽  
pp. 8 ◽  
Author(s):  
Lodewijk Roeygens ◽  
Wim De Waele ◽  
Koen Faes
Keyword(s):  
Welding Process ◽  
Dissimilar Materials ◽  
Magnetic Pulse ◽  
Major Goal ◽  
Optimal Input ◽  
Internal Support ◽  
Single Turn ◽  
Input Parameters ◽  
Pulse Welding ◽  
Set Up

This paper describes the magnetic pulse welding process (MPW) for tubes. Material combinations of aluminium to steel and copper to aluminium were experimentally evaluated. The first major goal of this work is to experimentally obtain the optimal input parameters like the discharge energy, the stand-off distance and the tool overlap for MPW of the material combinations. Welding windows with all possible input parameters are created for both material combinations. Furthermore, a comparison is done between three coil systems; a single turn coil with field shaper, a single turn coil with a field shaper and transformer and a multi-turn coil and field shaper. Metallographic investigation of the samples, hardness tests and leak tests were executed to determine the most suitable machine set-up and the optimal input parameters for each set-up. A second major goal is to determine the influence of the target tube wall thickness on the deformation of tube-tube welds when no internal support is used.

scholarly journals Combined processes of environmentally friendly technology for magnetic-pulse welding

2019 ◽  
Vol 110 ◽  
pp. 01008
Author(s):  
Evgeny Strizhakov ◽  
Stanislav Nescoromniy
Keyword(s):  
Dissimilar Materials ◽  
Diffusion Welding ◽  
Combined Processes ◽  
Magnetic Pulse ◽  
Shock Pulse ◽  
Magnetic Pulse Welding ◽  
Melting Temperatures ◽  
The Matrix ◽  
Force Impact ◽  
Pulse Welding

Various techniques for producing fixed joints in solid using electromagnetic fields are considered; basic diagrams, physics, features, and technical capabilities of each method are described. It is shown that thin-walled tubular irregular structures can be obtained under the magnetic-pulse moulding welding that joins the combined actions of induced currents passing through the overlap zone and magnetic pressure for apposing the weldable edges and for shaping in accordance with the matrix configuration. Obtaining joints from dissimilar materials and structures of different thicknesses is implemented due to shock pulse capacitor welding with magnetic pulse drive. The series connection of the weldable parts enables to synchronize the current flow and force impact on the weld junction. Depending on the combination of the weldable products, three techniques of shock pulse capacitor welding with magnetic pulse drive are proposed. To intensify the quality improvement of the female connectors obtained, it is proposed to use the magnetic-pulse welding in vacuum instead of the diffusion welding. Preheating of the complete unit in vacuum allows for the pre-activation of the connectable surfaces. A unique feature of the implemented diagram is a remote action on the telescopic joints of dissimilar alloys heated in vacuum to the pre-melting temperatures through a quartz glass.

Welding Interface in Magnetic Pulse Welded Joints

2010 ◽  
Vol 654-656 ◽  
pp. 755-758 ◽  
Author(s):  
Mitsuhiro Watanabe ◽  
Shinji Kumai
Keyword(s):  
Explosive Welding ◽  
Intermediate Phase ◽  
Dissimilar Materials ◽  
Magnetic Pulse ◽  
Fine Crystal ◽  
Phase Layer ◽  
Magnetic Pulse Welding ◽  
Welding Interface ◽  
Pulse Welding ◽  
The Impact

Magnetic pulse welding was applied to the lap joining of similar (Al/Al) and dissimilar materials (Al/Fe, Al/Cu, and Al/Ni). The magnetic pulse welding is a kind of impact welding represented by explosive welding. The impact energy is induced by electromagnetic force generated by interaction among discharge pulse, induced magnetic flux, and eddy current produced at the plate surface. The welding was achieved within 10 microseconds with a negligible temperature increase. The welding interface exhibited a characteristic wavy morphology, which was similar to that of the explosive welding. In the Al/Fe, Al/Cu, and Al/Ni joints, an intermediate phase layer was produced along the wavy interface. In order to investigate microstructure of the intermediate phase layer, TEM observation of the welding interface was carried out. TEM observation revealed that the intermediate phase layer consisted of amorphous phase and fine crystal grains.

scholarly journals Magnetic Pulse Welding Technology

2011 ◽  
Vol 7 (2) ◽  
pp. 169-179
Author(s):  
Ahmad Jassim
Keyword(s):  
Mechanical Energy ◽  
Dissimilar Materials ◽  
Electrical Energy ◽  
Work Piece ◽  
Magnetic Pulse ◽  
Metallic Materials ◽  
Welding Technology ◽  
Conventional Machine ◽  
Pulse Welding ◽  
Pulse Technology

In this paper, the benefits of using Magnetic Pulse machine which is belong to Non-conventional machine instead of conventional machine. Magnetic Pulse Technology is used for joining dissimilar metals, and for forming and cutting metals. It is a non contact technique. Magnetic field is used to generate impact magnetic pressure for welding and forming the work piece by converted the electrical energy to mechanical energy. It is enable us to design previously not possible by welding dissimilar materials and allowing to welds light and stronger materials together. It can be used to weld metallic with non metallic materials to created mechanical lock on ceramics, polymers, rubbers and composites. It is green process; there is no heat, no radiation, no gas, no smoke and sparks, therefore the emissions are negligible.

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