Numerical study of an interlayer effect on explosively welded joints

Mahmood, Yasir; Guo, Baoqiao; Chen, P; Zhou, Qiang; Bhatti, Ashfaq Ahmad

doi:10.21152/1750-9548.14.1.69

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…The formation of the wavy structure at the weld interface has attracted a lot of attention among researchers [ 12 , 13 , 14 , 15 ]. At present, the hydrodynamic theory is the main theory that describes the dynamic behavior of a material under high-velocity oblique collision; therefore, it is most often used to explain wave formation [ 16 , 17 ]. For example, in [ 18 ], smoothed-particle hydrodynamics (SPH) was used to analyze high-velocity oblique collision.…”

Section: Resultsmentioning

confidence: 99%

Morphology and Structure of Brass–Invar Weld Interface after Explosive Welding

et al. 2022

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This paper presents the results of a study of the morphology and structure at the weld interface in a brass–Invar bimetal, which belongs to the class of so-called thermostatic bimetals, or thermobimetals. The structure of the brass–Invar weld interface was analyzed using optical microscopy and scanning electron microscopy (SEM), with the use of energy-dispersive X-ray (EDX) spectrometry and back-scattered electron diffraction (BSE) to identify the phases. The distribution of the crystallographic orientation of the grains at the weld interface was obtained using an e-Flash HR electron back-scatter diffraction (EBSD) detector and a forward-scatter detector (FSD). The results of the study indicated that the weld interface had the wavy structure typical of explosive welding. The wave crests and troughs showed the presence of melted zones consisting of a disordered Cu–Zn–Fe–Ni solid solution and undissolved Invar particles. The pattern quality map showed that the structure of brass and Invar after explosive welding consisted of grains that were strongly elongated towards the area of the highest intensive plastic flow. In addition, numerous deformation twins, dislocation accumulations and shear bands were observed. Thus, based on the results of this study, the mechanism of Cu–Zn–Fe–Ni structure formation can be proposed.

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Section: Resultsmentioning

confidence: 99%

Morphology and Structure of Brass–Invar Weld Interface after Explosive Welding

et al. 2022

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“…The important thing to note is that SCG in the welding gap is poorly seen in the X-ray images due to the low density of SCG. Furthermore, the formation of the metal jet before the collision point was simulated by the smoothed-particle hydrodynamics (SPH) method [ 24 , 25 , 26 , 27 , 28 ], which showed that the temperature of the metal jet may reach 3000 K [ 21 ]. The SPH method is a computational method used for simulating the mechanics of the continuum media, such as solid mechanics and fluid flows.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Studies of the Shock-Compressed Gas Parameters in the Welding Gap

Malakhov,

Denisov,

Niyozbekov

et al. 2024

Materials

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This work is devoted to the study of the processes that take place in the welding gap during explosive welding (EW). In the welding gap, when plates collide, a shock-compressed gas (SCG) region is formed, which moves at supersonic speed and has a high temperature that can affect the quality of the weld joint. Therefore, this work focuses on a detailed study of the parameters of the SCG. A complex method of determining the SCG parameters included: determination of the detonation velocity using electrical contact probes, ceramic probes, and an oscilloscope; calculation of the SCG parameters; high-speed photography of the SCG region; measurement of the SCG temperature using optical pyrometry. As a result, it was found that the head front of the SCG region moved ahead of the collision point at a velocity of 3000 ± 100 m/s, while the collision point moved with a velocity of 2500 m/s. The calculation of the SCG temperature showed that the gas was heated up to 2832 K by the shock compression, while the measured temperature was in the range of 4100–4400 K. This is presumably due to the fact that small metal particles that broke off from the welded surfaces transferred their heat to the SCG region. Thus, the results of this study can be used to optimize the EW parameters and improve the weld joint quality.

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Study of explosive welding of A6061/SUS821L1 using interlayers with different thicknesses and the air shockwave between plates

Chen

Inao

et al. 2021

Int J Adv Manuf Technol

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In this work, interlayers with different thickness were used to weld A6061 aluminum alloy and SUS 821L1 duplex stainless steel. The results indicated that the interlayer thickness had a significant effect on the welding. The influence of the air shock wave between the plates on the welding results was examined. The fluid-Solid coupling finite element method was used to simulate the movement of the interlayer under the action of the air shock wave. The smoothed particle hydrodynamics method was used to simulate the oblique impact process of the plates, and the unwelded samples were analyzed using the simulation results. In the analysis of weldability window, the influence of the interlayer on the upper and lower limits was examined.

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Numerical study of an interlayer effect on explosively welded joints

Cited by 4 publications

References 17 publications

Morphology and Structure of Brass–Invar Weld Interface after Explosive Welding

Morphology and Structure of Brass–Invar Weld Interface after Explosive Welding

Theoretical and Experimental Studies of the Shock-Compressed Gas Parameters in the Welding Gap

Study of explosive welding of A6061/SUS821L1 using interlayers with different thicknesses and the air shockwave between plates

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