High-Speed X-Ray Transmission and Numerical Study of Melt Flows inside the Molten Pool during Laser Welding of Aluminum Alloy

Table 2

Temperature profiles and flow patterns of molten pools corresponding to temperature gradient of point A and point B and flow velocity of point B at different welding speeds and 4 kW laser power.

Welding speeds	Top view	Longitudinal section view	Temperature gradient of point A and point B	Flow velocity of point B
mm/s			252 K/mm	32 mm/s
mm/s			421 K/mm	95 mm/s
mm/s			552 K/mm	111 mm/s