Study on interface morphology and effect of gap gas in explosive welding

Xiangyu, Zeng; Chen, Xiang; Jin, Peng; Li, Xiaojie

doi:10.1007/s40194-022-01280-x

Cited by 4 publications

(1 citation statement)

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“…It is well known that strength of the EW joint depends on the following parameters: detonation velocity (D), flyer plate velocity (

0 ), welding gap (h), explosive mass ratio (r), surface finish of the initial materials, and the type of atmosphere in the welding gap (air or an inert gas) [ 14 ]. The collision of the plates forms a shock-compressed gas (SCG) and metal jet in the gap between the plates [ 15 , 16 , 17 ]. The SCG is limited on one side by the air shock wave front and on the other by the inclined surface of the flyer plate moving at collision point velocity [ 18 ].…”

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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“…It is well known that strength of the EW joint depends on the following parameters: detonation velocity (D), flyer plate velocity (

Section: Introductionmentioning

confidence: 99%