On the transition from a waveless to a wavy interface in explosive welding

1987 ◽  
Vol 91 ◽  
pp. 217-222 ◽  
Author(s):  
D. Jaramillo ◽  
A. Szecket ◽  
O.T. Inal
Keyword(s):  
Explosive Welding ◽  
Wavy Interface

Underwater Explosive Welding of Thin Magnesium Plate onto some Metal Plates

2007 ◽  
Vol 566 ◽  
pp. 303-308
Author(s):  
Akihisa Mori ◽  
Kazuyuki Hokamoto ◽  
Masahiro Fujita
Keyword(s):  
Explosive Welding ◽  
Experimental Results ◽  
Welding Condition ◽  
Metal Plates ◽  
Wavy Interface ◽  
Welding Technique

Explosive welding of a thin magnesium plate onto some metal plates was performed by using underwater explosive welding technique developed by some of the authors. The experimental results show that the wavy interface which is typically found in the well-bonded clad was observed. The welding condition is discussed using the welding window based on the numerically simulated results using AUTODYN-2D code.

Numerical Studies of Explosive Welding by SPH

2007 ◽  
Vol 566 ◽  
pp. 61-64 ◽  
Author(s):  
Katsumi Tanaka
Keyword(s):  
Explosive Welding ◽  
High Speed ◽  
Weld Interface ◽  
Oblique Impact ◽  
Major Mechanism ◽  
Particle Hydrodynamics ◽  
Detached Shock Wave ◽  
Smoothed Particle ◽  
Wavy Interface ◽  
Karman Vortex

A particular characteristic of an explosively produced weld is that the profile of the weld interface often has a regular wavy appearance. An effect of detached shock wave and jetting on the metal interface of explosive welding has been shown by SPH (Smoothed particle hydrodynamics). Numerical results show wavy interface which is observed in several experiments. High speed jet between interface and Karman vortex after oblique impact of a flyer plate to a parent plate were major mechanism of explosive welding.

Explosive Welding of Molybdenum/Copper Using Underwater Shock Wave

2012 ◽  
Vol 706-709 ◽  
pp. 735-740 ◽  
Author(s):  
Palavesamuthu Manikandan ◽  
Joo Noh Lee ◽  
Akihisa Mori ◽  
Kazuyuki Hokamoto
Keyword(s):  
Shock Wave ◽  
Explosive Welding ◽  
Microstructural Characterization ◽  
Visual Observation ◽  
Underwater Shock Wave ◽  
Wavy Interface ◽  
Underwater Shock ◽  
Weldability Window ◽  
The Right ◽  
Welding Technique

In this research, surface modification of copper with molybdenum was made using explosive welding technique. The underwater shock waves derived from the detonation of explosives was used to bond thin films of molybdenum on copper. Visual observation shows a sound joining of Mo/Cu. Microstructural characterization reveals the bonding interface with a clear wave formation between the participant metals. A clear wavy interface is formed when the weldable conditions lie in the weldability window. When the weldable conditions lie near the right limit or lower limit, a jet trapped region was formed.

scholarly journals A semi-Lagrangian reproducing kernel particle method with particle-based shock algorithm for explosive welding simulation

2021 ◽  
Author(s):  
Jonghyuk Baek ◽  
Jiun-Shyan Chen ◽  
Guohua Zhou ◽  
Kevin P. Arnett ◽  
Michael C. Hillman ◽  
...  
Keyword(s):  
Explosive Welding ◽  
Reproducing Kernel ◽  
Welding Process ◽  
Volumetric Strain ◽  
Particle Method ◽  
Reproducing Kernel Particle Method ◽  
Deformation Problem ◽  
Wavy Interface ◽  
Material Separation ◽  
Reproducing Kernel Particle

AbstractThe explosive welding process is an extreme-deformation problem that involves shock waves, large plastic deformation, and fragmentation around the collision point, which are extremely challenging features to model for the traditional mesh-based methods. In this work, a particle-based Godunov shock algorithm under a semi-Lagrangian reproducing kernel particle method (SL-RKPM) is introduced into the volumetric strain energy to accurately embed the key shock physics in the absence of a mesh or grid, which is shown to also ensure the conservation of linear momentum. For kernel stability, a deformation-dependent anisotropic kernel support update algorithm is proposed, which is shown to capture excessive plastic flow and material separation. A quasi-conforming nodal integration is adopted to avoid the need of updating conforming cells which is tedious in extreme deformations. It is shown that the proposed formulation effectively captures shocks, jet formation, and smooth-to-wavy interface morphology transition with good agreement with experimental results.

scholarly journals Investigation of properties of Cu-Al explosively welded bimetals

2019 ◽  
pp. 31-37
Author(s):  
Ján Lokaj ◽  
Miroslav Sahul ◽  
Martin Sahul ◽  
Petr Nesvadba
Keyword(s):  
Intermetallic Compound ◽  
Aluminium Alloy ◽  
Work Hardening ◽  
Explosive Welding ◽  
Interface Layer ◽  
Explosion Welding ◽  
Flyer Plate ◽  
Edx Analyses ◽  
Wavy Interface

Explosion welding of cooper C10200 to AW 5083 aluminium alloy was performed. The C10200 was proposed as a flyer plate. A parallel setup was used during explosive welding. Bimetals were characterized by regular wavy interface. The intermetallic compound (IMC) layer was observed at the interface of bimetals after 12 month, however, no annealing was performed. EDX analyses revealed that the interface layer consists of the intermetallic compound CuAl. Microhardness at the interface increased due to the presence of the IMC and work hardening as well.

Research of Explosive Welding: Numerical Simulation and Analysis

2013 ◽  
Vol 668 ◽  
pp. 560-564 ◽  
Author(s):  
Xiao Xu Wang ◽  
Jin Xiang Wang ◽  
Yong He
Keyword(s):  
Temperature Field ◽  
Explosive Welding ◽  
Propagation Distance ◽  
Physical Parameters ◽  
Finite Element Program ◽  
Welding Temperature ◽  
Heat Transfer Theory ◽  
Particle Hydrodynamics ◽  
Element Program ◽  
Wavy Interface

To improve understanding of explosive welding and relate the effect of the process variables on the physical parameters, the smooth particle hydrodynamics (SPH) method in the LS-DYNA 12.0 finite element program was adopt to simulate the process of two-layer steel explosive welding. Temperature field near the stagnation point was calculated according to the work-heat transfer theory. Finally, the formation mechanism of the interface wave was analyzed under the condition that strain field, temperature field etc. were considered. The results show that: the phenomenon of jetting and the interfacial waves observed in explosive welding were quite well reproduced in these simulations; the changing collision angle with propagation distance is directly responsible for the change in interface morphology from wavy to smooth at the welding front; the maximum stress ,strain and temperature are localised at the wavy interface zone; the maximum temperatures near the interface will be high enough under proper conditions and this will be helpful for the formation of the jet and the wavy interface.

Swinging Wake Mechanism for Interface Wave Generation in Explosive Welding of Metals

1990 ◽  
Vol 57 (3) ◽  
pp. 514-521 ◽  
Author(s):  
R. C. Gupta ◽  
G. S. Kainth
Keyword(s):  
Hydrodynamic Model ◽  
Explosive Welding ◽  
Reasonable Agreement ◽  
General Situation ◽  
Wave Characteristics ◽  
Interface Wave ◽  
Fluid Jets ◽  
Wavy Interface ◽  
Interface Prediction ◽  
Wake Model

A hydrodynamic model of explosive welding is considered. A swinging wake model for explosive welding is used to explain the generation of interfacial waves and to predict wave characteristics. The two plates are considered as main fluid jets divided by stagnation streamlines into a saliant jet and a reentrant jet. The model considers that the wake swings from side to side behind an imaginary obstacle bounded by the stagnation streamlines, thereby producing a wavy interface. Prediction of degree of distortion, η, and amplitude-to-wavelength ratio h/λ, by the swinging wake model show reasonable agreement with the available experimental results. The expression for the diameter of the obstacle is developed for the general situation in explosive welding.

Optical Reconstruction of Wavy Interface between Stratified Liquids: Experiment and Instrumentation

2018 ◽  
Author(s):  
Parmod Kumar ◽  
Prabh Pal Singh Seerha ◽  
Arup Kumar Das ◽  
Sushanta K. Mitra
Keyword(s):  
Wavy Interface ◽  
Optical Reconstruction
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