Unstable Waves Formed by Explosive Welding
B. S. Zlobin1, V. V. Kiselev1, A. A. Shtertser2
1Design and Technology, Lavrent’ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2Lavrent’ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
Keywords: explosion welding, impact parameters, wave formation, unstable waves
Abstract
The reasons for the appearance of unstable large and small waves in the joint zone during explosion welding are investigated. Such waves arise when there are regions on the projected plate with even a small (10 ÷ 16 %), but abrupt (stepwise) change in thickness in the form of grooves obtained by machining. Unstable waves in the vicinity of the steps are formed only in the case when the width of the groove is greater than the thickness of the projectile plate. If the grooves are made on a fixed plate, then unstable waves do not arise. Analysis of the experimental data shows that the size of the waves generated in the bimetal in the vicinity of the steps on the thrown plate is affected by a sharp change in the impact angle associated with the bending of the plate at the places of the steps.
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