Heat transfer and fluid flow and their effects on the solidification microstructure in full-penetration laser welding of aluminum sheet

Shaoning Geng^a, Ping Jiang^a^,^*(

), Xinyu Shao^a, Lingyu Guo^b, Xuesong Gao^b

Fig. 12.. Comparison of the solidification parameters along the representative isothermal (887.5 K) in mushy zone for different welding cases: (a) temperature gradient G, (b) solidification rate R, (c) morphology factor G/R, (d) cooling rate GR. The welding parameters are: Case I - P_L = 2500 W, V = 80 mm/s; Case II - P_L = 3000 W, V = 120 mm/s; Case III - P_L = 3500 W, V = 180 mm/s.