Investigation of the Material Welding Using the High-Speed Liquid Impact

Abstract

Feasibility to use the high-speed liquid impact for joining similar and dissimilar metals was investigated experimentally. An experimental setup that entails a launcher for projectiles formation and samples folders was constructed. The experiments involved joining of sandwiches containing two or three layers of metals were impacted by a high-speed projectile. The metals combinations included copper, brass, steel, and nickel alloys. The generated samples were examined visually, the strength of the joint was explored, and the integrity of the weld was estimated using ultrasound. In most of the experiments metallurgical bonding of joined metals was confirmed. The results of the ultrasound test demonstrated high quality of the generated joints. The performed experiments showed feasibility of the liquid impact-based welding. This process is the improvement of the explosion welding. Unlike the explosion welding impact-based process does not require special placing of work pieces while the stresses in the impact zone can be precisely directed and controlled.

Material Test on Strain Fracture and Crack Opening Displacement Based on Digital Image Correlation Method

“…Microscopic cracks inside materials is the initial act of defects in both the material welding area [1] and material fatigue caused by variable load. Under the combined action of welding residual stress [2] and applied load, the microscopic crack increases constantly until it becomes a macroscopic crack, and the macroscopic crack then continues to expend, finally leading to the fracture of materials.…”

Influence of the working fluid properties on water jet cannon efficiency

“…The technologies, based on liquid jets of high and ultra-high speed, are used for cutting various materials, surface treatment, destruction of rocks and concrete blocks, ammunition disposal, extinguishing the gas flares and so on [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The effective use of these technologies requires determination of the appropriate design parameters of hydro impulse jet unit, selection of optimal operating modes and parameters of the working fluid for every specific case.…”

Propellant Driven Water Acceleration and Its Influence on System Durability

“…Water projectiles proved to be an effective metal piercing tool [10]. During metal forming tests, projectiles were used as a punch impacting a work piece placed on a female die [11,12]. Generated parts reproduced precisely the shape of a die cavity.…”

“…The viability of microscale forming has also been explored and proven [13,14]. It has been proven that high-speed liquid projectiles could be used for joining of similar and dissimilar metals [ 15]. The mechanisms of forming and welding applications of the liquid projectiles are similar to those of explosive forming and welding; however, the proposed technology is much simpler and its control is much more accurate than those of the explosive forming and welding.…”