Phase formation and growth in Al–Mg couple with an electromagnetic field

Effect of static magnetic field on microstructure and interdiffusion behavior of Fe/Fe–Si alloy diffusion couple

“…Many authors had investigated the effect of magnetic field on the diffusion behavior of Mg-Al and Zn-Al couples and the results also indicated that the reduced or increased diffusion has great relation with frequency factor but not through the change in activation energy [7][8][9]. However, no widely accepted theory has been established for the influence of magnetic field on the atom diffusion behavior.…”

“…Li et al [7] found that the thickness of intermediate phases in Mg-Al diffusion couples was reduced after annealing at 340-420°C under the magnetic field compared with that without the field, which is primary due to the deceased frequency factor under the magnetic field but not the activation energy. However, Liu et al [8,9] found that the thickness of intermediate phases in Al-Zn and Al-Mg diffusion couples increased in a parabolic law with the application of alternative magnetic field at 330-430°C, which has great relation with the increased pre-exponential frequency factor but not through the change in the activation energy. Hence, different magnetic field directions (perpendicular or parallel), intensities (high or low), and imposing properties (static or alternating) can lead to different microstructures of diffusion couples.…”

Mechanical properties and microstructural evaluation of AA1100 to AZ31 dissimilar friction stir welds

“…Liu et al [38] calculated K 0 and Q of Al 3 Mg 2 and Al 12 Mg 17 that form in the joint of Mg and Al and reported that the K 0 and Q of Al 3 Mg 2 are 1.53 Â 10 À4 cm 2 /s and 53.34 kJ/mol, respectively; and the K 0 and Q of Al 12 Mg 17 are 22.4 cm 2 /s and 125.65 kJ/mol, respectively. By assumption of 8 s for the time of FSW, the thickness of intermetallic layer for different peak temperature was calculated (Fig.…”

Effect of Intermetallic Compound Layer on Tensile Strength of Dissimilar Friction-Stir Weld of a High Strength Mg Alloy and Al Alloy

“…Liu et al 19,20) have calculated K 0 and Q of Al 3 Mg 2 and Al 12 Mg 17 that form in the joint of Mg and Al, and reported that the K 0 and Q of Al 3 Mg 2 are 1:5 Â 10 À4 cm 2 /s and 53.3 kJ/mol, respectively; and the K 0 and Q of Al 12 Mg 17 are 2:2 Â 10 cm 2 /s and 125.7 kJ/mol, respectively. In addition, the temperature measurement result shows that the temperature at the interfacial region during the cooling process of FS welding is approximately 573 K, when the welding speed is 100 mm/min, the tool rotating speed is 500 rpm, and the offset position is 0 mm.…”