A two steps Lagrangian–Eulerian numerical model for the simulation of explosive welding of three dissimilar materials joints

2021 ◽  
Vol 35 ◽  
pp. 541-549
Author(s):  
Davide Campanella ◽  
Gianluca Buffa ◽  
Livan Fratini
Keyword(s):  
Numerical Model ◽  
Explosive Welding ◽  
Dissimilar Materials

Numerical Modelling of Explosive Welding on the Basis of the Coupled Eulerian Lagrangian Approach

2015 ◽  
Vol 651-653 ◽  
pp. 1415-1420 ◽  
Author(s):  
Lukasz Madej ◽  
Konrad Perzynski ◽  
Henryk Paul
Keyword(s):  
Numerical Model ◽  
Explosive Welding ◽  
Base Plate ◽  
Material Behavior ◽  
Physical Parameters ◽  
Flyer Plate ◽  
Process Variables ◽  
Explosive Material ◽  
Major Process ◽  
Is Development

The main goal of the paper is development of a numerical model for explosive welding involving geometry and properties of major process components, i.e. base plate, flyer plate and explosive material. To properly replicate material behavior under these severe conditions the Coupled Eulerian Lagrangian (CEL) approach is used. Series of numerical simulations are realized based on the developed model in order to relate the process variables to the physical parameters. That will be used in further work to establish how these can be used to predict whether or not bonding will occur.

scholarly journals Aluminum-to-Steel Cladding by Explosive Welding

Metals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1062 ◽  
Author(s):  
Gustavo H. S. F. L. Carvalho ◽  
Ivan Galvão ◽  
Ricardo Mendes ◽  
Rui M. Leal ◽  
Altino Loureiro
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Explosive Welding ◽  
Electron Backscatter Diffraction ◽  
Dissimilar Materials ◽  
Image Correlation ◽  
Low Density ◽  
Explosive Mixture ◽  
Successful Testing ◽  
Backscatter Diffraction

The production of aluminum-carbon steel and aluminum-stainless steel clads is challenging, and explosive welding is one of the most suitable processes to achieve them. The present work aims to investigate the coupled effect of two strategies for optimizing the production of these clads by explosive welding: the use of a low-density interlayer and the use of a low-density and low-detonation velocity explosive mixture. A broad range of techniques was used to characterize the microstructural and the mechanical properties of the welds, specifically, optical microscopy, scanning electron microscopy, energy dispersive spectroscopy, electron backscatter diffraction, microhardness and tensile-shear testing with digital image correlation analysis. Although aluminum-carbon steel and aluminum-stainless steel have different weldabilities, clads with sound microstructure and good mechanical behavior were achieved for both combinations. These results were associated with the low values of collision point and impact velocities provided by the tested explosive mixture, which made the weldability difference between these combinations less significant. The successful testing of this explosive mixture indicates that it is suitable to be used for welding very thin flyers and/or dissimilar materials that easily form intermetallic phases.

Experimental Investigation and Micro-Structure Study of Interface of Explosive Welded SS304 and AA6061 Plates

2015 ◽  
Vol 830-831 ◽  
pp. 261-264 ◽  
Author(s):  
Abhishek Upadhyay ◽  
Bir Bahadur Sherpa ◽  
Sandeep Kumar ◽  
Niraj Srivastav ◽  
Pal Dinesh Kumar ◽  
...  
Keyword(s):  
Explosive Welding ◽  
Pure Aluminum ◽  
Dissimilar Materials ◽  
Structure Study ◽  
Conventional Technique ◽  
Micro Cracks ◽  
Interface Characteristics ◽  
Velocity Of Detonation ◽  
Metallurgical Bond ◽  
Two Stages

The explosive welding is a non-conventional technique gaining popularity due to its ability to join dissimilar metals. The technique is very successful in achieving area joining by using the controlled energy of explosives which creates a metallurgical bond between two similar or dissimilar materials. This paper explains the technique of explosive welding for joining SS304 and AA6061 using pure aluminum (2 mm) as an interlayer. The joining was done in two stages. The explosive used is a mixture of Trimonite and salt having velocity of detonation (VOD) in the range of 1500-1600 m/sec. Ultrasonic testing showed good bonding over more than 80%. Micro-hardness variations as compared to parent materials have been evaluated along with microstructure study done to analyze the interface characteristics. SEM/EDS also have been used to check the presence of any possible brittle phases. Both the interfaces are found to be laminar, continuous, uniform and free from micro-cracks.

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.

Microstructure and Strength of Explosively Welded Titanium/Ni-Based Alloy Composite with Cu/Ta as Interlayer

2014 ◽  
Vol 682 ◽  
pp. 21-24 ◽  
Author(s):  
Vjacheslav I. Mali ◽  
Iuliia N. Maliutina ◽  
K.A. Skorokhod
Keyword(s):  
Composite Material ◽  
Yield Strength ◽  
Explosive Welding ◽  
Dissimilar Materials ◽  
Strength Test ◽  
Metallographic Analysis ◽  
Alloy Composite

In current research composite copper/tantalum were used as interlayer for explosive welding of titanium and Ni-based alloy sheets. Defects such as cracks coupled with brittle intermetallics compounds were not detected at the interface of dissimilar materials by metallographic analysis. Strength test of obtained composite material reveals growth of yield strength in 2 times in comparison with Ni-based alloy.

Analytical and High-Resolution EM Study of Crystalline Phases formed at Metal-Ceramic Interface

1990 ◽  
Vol 48 (2) ◽  
pp. 426-427
Author(s):  
N. Merk ◽  
A. P. Tomsia ◽  
G. Thomas
Keyword(s):  
Cross Section ◽  
Dissimilar Materials ◽  
Ceramic Materials ◽  
Electron Micrograph ◽  
Scanning Electron Micrograph ◽  
Structural Applications ◽  
Metal Ceramic ◽  
The Subject ◽  
Ceramic Compounds ◽  
Scanning Electron

A recent development of new ceramic materials for structural applications involves the joining of ceramic compounds to metals. Due to the wetting problem, an interlayer material (brazing alloy) is generally used to achieve the bonding. The nature of the interfaces between such dissimilar materials is the subject of intensive studies and is of utmost importance to obtain a controlled microstructure at the discontinuities to satisfy the demanding properties for engineering applications . The brazing alloy is generally ductile and hence, does not readily fracture. It must also wett the ceramic with similar thermal expansion coefficient to avoid large stresses at joints. In the present work we study mullite-molybdenum composites using a brazing alloy for the weldment.A scanning electron micrograph from the cross section of the joining sequence studied here is presented in Fig. 1.

Interfacial structures of dissimilar materials joined by capacitor-discharge welding

1994 ◽  
Vol 52 ◽  
pp. 534-535
Author(s):  
C. P. Doğan ◽  
R. D. Wilson ◽  
J. A. Hawk
Keyword(s):  
Rapid Solidification ◽  
Fusion Zone ◽  
Dissimilar Materials ◽  
Solidification Process ◽  
Weld Interface ◽  
Capacitor Discharge ◽  
Fine Grained ◽  
Iron Aluminum ◽  
Conductive Ceramics ◽  
Capacitor Discharge Welding

Capacitor Discharge Welding is a rapid solidification technique for joining conductive materials that results in a narrow fusion zone and almost no heat affected zone. As a result, the microstructures and properties of the bulk materials are essentially continuous across the weld interface. During the joining process, one of the materials to be joined acts as the anode and the other acts as the cathode. The anode and cathode are brought together with a concomitant discharge of a capacitor bank, creating an arc which melts the materials at the joining surfaces and welds them together (Fig. 1). As the electrodes impact, the arc is extinguished, and the molten interface cools at rates that can exceed 106 K/s. This process results in reduced porosity in the fusion zone, a fine-grained weldment, and a reduced tendency for hot cracking.At the U.S. Bureau of Mines, we are currently examining the possibilities of using capacitor discharge welding to join dissimilar metals, metals to intermetallics, and metals to conductive ceramics. In this particular study, we will examine the microstructural characteristics of iron-aluminum welds in detail, focussing our attention primarily on interfaces produced during the rapid solidification process.

Sign in / Sign up

Export Citation Format

Share Document