Laser welding of aluminium alloys 5083 and 6082 under conduction regime

Effect of power distribution on the weld quality during hybrid laser welding of an Al–Mg alloy

“…For many years, both arc and laser welding have been the dominant joining methods of metals [1,2]. Conventional electric arc welding processes show important advantages due to their availability, energy efficiency, simple technology and low costs of operation but meanwhile have some disadvantages such as process instability and slowness, a wide heat-affected zone (HAZ) and weldment distortion.…”

The Effect of Process Parameters on the Microstructure and Mechanical Performance of Fiber Laser-Welded AA5182 Aluminium Alloys

“…As can be seen, the microhardness value of the FZ is slightly higher than that of the BM. The increase of the microhardness in the FZ has been reported by some researchers, especially in the nonheat treatable alloys with O temper condition [6] and [25]. This is due to the microstructural refinement of the fusion zone with respect to the metal base.…”

“…The wide range of temperatures in vaporization and solidification can lead to keyhole instability, blowholes, porosity and various defects in the welding metallurgy, such as hot cracking [5]. The loss of alloying elements is another problem Furthermore, there is a poor coupling of the laser energy due in part to the high density of free electrons in the solid, making aluminium one of the best reflectors of light [6].…”

“…SanchezAmaya et al [6] investigated laser welded 5083 and 6082 aluminium alloys under conduction mode and found that welding speed was more influential than laser power on the final size of the weld bead. Yang et al [7] examined the effect of the incident beam position, incident beam angle and beam separation distance on weld quality.…”

Employment of fiber laser technology to weld austenitic stainless steel 304 l with aluminum alloy 5083 using pre-placed activating flux

“…In case of our experiments, the alloying elements existed inside the solid solution with aluminum matrix caused the molten pool ejection. To explain more, the AA 5083 is reported to lose some portion of its alloying elements particularly the magnesium and zinc during the keyhole laser welding due to their lower boiling temperatures (Mg ~ 1100 0 C and Zn ~ 907 0 C) compared with aluminum matrix (Al ~ 2470 0 C) and very high vapor pressure (1.14 5 pa for Zn and 1.11 5 pa for Mg), that can lead to significant ejection of encompassing Al-rich molten pool and formation of cavity at weld bead's top section [40,41]. Therefore, in case another material such as steel overlaps the AA 5083 sheet, the molten pool of the top material will be ejected as well.…”