Electromagnetic pulse welding of Al/Cu dissimilar materials: Microstructure and tensile properties

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.

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Bonding and microstructure evolution in electromagnetic pulse welding of hardenable Al alloys

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2020.116965 ◽

2021 ◽

Vol 290 ◽

pp. 116965

Author(s):

Z. Li ◽

E. Beslin ◽

A.J. den Bakker ◽

G. Scamans ◽

M. Danaie ◽

...

Keyword(s):

Microstructure Evolution ◽

Electromagnetic Pulse ◽

Al Alloys ◽

Pulse Welding

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In situ metallic porous structure formation due to ultra high heating and cooling rates during an electromagnetic pulse welding

Scripta Materialia ◽

10.1016/j.scriptamat.2016.09.030 ◽

2017 ◽

Vol 128 ◽

pp. 10-13 ◽

Cited By ~ 24

Author(s):

T. Sapanathan ◽

R.N. Raoelison ◽

N. Buiron ◽

M. Rachik

Keyword(s):

Porous Structure ◽

Structure Formation ◽

Electromagnetic Pulse ◽

Cooling Rates ◽

Heating And Cooling ◽

High Heating ◽

Pulse Welding

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Joining Dissimilar Materials by Magnetic Pulse Welding

10.4271/2017-01-0474 ◽

2017 ◽

Author(s):

Chady Khalil ◽

Yannick Amosse ◽

Guillaume Racineux

Keyword(s):

Dissimilar Materials ◽

Magnetic Pulse ◽

Magnetic Pulse Welding ◽

Pulse Welding

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

International Journal Sustainable Construction & Design ◽

10.21825/scad.v8i1.6810 ◽

2017 ◽

Vol 8 (1) ◽

pp. 8 ◽

Cited By ~ 1

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.

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Combined processes of environmentally friendly technology for magnetic-pulse welding

E3S Web of Conferences ◽

10.1051/e3sconf/201911001008 ◽

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.

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