Effect of welding wires on microstructure and mechanical properties of 2A12 aluminum alloy in CO2 laser-MIG hybrid welding

Laser welding of aluminium alloys 5083 and 6082 under conduction regime

“…The laser welding is generally more difficult to apply to aluminium alloys [10,11] than to steel alloys, due to its higher reflectivity, higher thermal conductivity and lower viscosity [5,12]. Thus, the thermal conductivity of aluminium alloys (143 W m À1 K À1 ) is about one order of magnitude higher than that of steels (14 W m À1 K À1 ) [1,13].…”

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

“…Besides, laser welding generates welding bead with high pores/ voids and is generally more difficult to apply to aluminum alloys, such as 5000 magnesium series. Those aluminum alloys, whose major alloying element is Mg, are desired for their excellent corrosion resistance, substantial strength and weldability [5][6][7]. Laser beam welding of Al alloy is particularly critical owing to high thermal and electrical conductivity, large thermal expansion, lower viscosity and high reflectivity of the metal [8].…”

Neural networks based prediction modelling of hybrid laser beam welding process parameters with sensitivity analysis

“…Hybrid laser welding is influenced by a large number of controllable process parameters bearing complex relationship among them. Initially, influence of those process parameters on weld bead characteristics [2,3], microstructure and mechanical properties [2,[4][5][6][7][8], welding strength [9] and welding defects [10] were studied by the researchers. Gradually, optimisation of weld penetration depth [11] and arc stability [12] has been conducted using design of experiment (DOE) based techniques.…”