Explosion Joining of Magnesium Alloy AZ31 and Aluminum

Abstract

Explosion welding has produced a large number of dissimilar joints. But the explosion welding of materials of low impact toughness and brittle nature is considered to be difficult. Magnesium, with its HCP structure, has a low capacity for plastic deformation at room temperature and moreover it has a high chemical reactivity. Therefore, successful explosion welding of magnesium alloys, demands careful attention to be paid to prevent failure or formation of brittle reacted zones at the weld interface. Explosive welding of the wrought Mg-Al-Zn alloy and commercially pure aluminum is performed. The welds are analyzed through metallographic characterization and shear tests. High quality welds of the two materials possessing shear strength higher than the softer layer has been obtained.

Explosive Welding of Thin Aluminum Plate onto Magnesium Alloy Plate Using a Gelatin Layer as a Pressure-Transmitting Medium

“…Here, H v (MPa) denotes the Vickers hardness of the hard component and k 1 a constant. The hardness values of each parent plate were obtained from the literature (AZ31: H v = 70, ρ = 1780 kg/m 3 [37]) and (Mg 96 Zn 2 Y 2 : H v = 101, ρ =1890 kg/m 3 [8]), and k 1 was set to 0.6 [19]. The contour lines corresponding to the kinetic energy lost due to collision are plotted in Figure 13, and we note that the lines are parallel to the lower-limit lines indicated as thick lines for welding.…”

“…In addition, similar hardness values were obtained at the Al and Mg alloy areas. [8,37], and the as-received hardness value of Al is the average measured value.…”

“…We note that after the bending test, the composite is fractured into two pieces without showing ductile behavior; however, there is no evidence of separation at the interface (as can be inferred from Figure 11b), which implies that the bonding strength is suitably high for practical applications. [8,37], and the as-received hardness value of Al is the average measured value.…”

Study on High-Strain-Rate Deformation of Magnesium Alloy Using Underwater Shock Waves Generated by High-Voltage Electric Discharge of Thin Wire

“…Many studies on technologies involving such high-strain-rate forming of metal plates have focused on deformation and bonding due to the impact loading of magnesium and aluminum alloys. Technologies for the explosive welding of AZ31 to aluminum alloy, steel, copper, and titanium by the application of shock waves are expected to have practical applications in industry [15][16][17][18][19][20][21][22][23][24].…”