The behavior of magnesium alloys during explosion welding and ways to prevent their failure

The causes of failure in magnesium alloys used as a component of multilayer composites made by explosion welding are analyzed. Ways to prevent the formation of cracks are outlined with the use of various techniques, namely, increasing the plasticity and decreasing the initial hardness, thermal treatment resulting in the elimination of structural heterogeneity, and the selection of welding flowcharts that exclude the dangerous effect of reflected depression waves.     

Structural changes in magnesium-aluminum composite obtained by explosion welding after bending and thermal treatment

The effect of bending deformation and subsequent thermal treatment on the behavior of the micromechanical properties and characteristics of a fine structure of the AD1-MA2-0 magnesium-aluminum composite material (CM) after explosion welding (EW) is investigated. It is found that an intermetallic interlayer is formed after the thermal treatment (t = 300 and 400°C, τ = 1 h) of the composite welded by explosion and subjected to bending, which substantially affects the behavior of the characteristics of a fine structure.     

Correction to: Structure Formation in the Zones of Joints Obtained by Explosion Welding with Subsequent Rolling of a Five-Layer Titanium-Steel Composite

Metallurgist - The fifth author’s name should read V. O. Kharlamov.     

Effect of plastic deformation on the structure and properties of laminated composite materials

Experience with the development and application of plasma cutting of metals using reversed polarity current and mixed gas supply is described. The high efficiency of plasma cutting with reversed polarity in both the manual and automatic cutting modes in the plant conditions is stressed. It is noted that the number of activations of the constricted arc can be greater than 1000 without failure of the electrode.     

Growth kinetics of the diffusion zone at the interface of the explosion-welded nickel–aluminium composite

The phase composition of molten metal in explosion-welded AD1 + NP2 + AD1 laminated composite is investigated and the transformation of the composite during heat treatment is studied. The equations linking the growth kinetics of the diffusion zone with the energy consumption in explosion welding are derived.     

Effect of technological factors on the diffusion kinetics in the copper-aluminum composite

An investigation is performed on the effect of thermal treatment conditions, furnace atmosphere, and technological protective coatings of various compositions on the formation of the phase composition of diffusion layers in welding zones of a layered intermetallic composite of the Cu-Al system produced by complex technology.