Mathematical Problems in Engineering / 2016 / Article / Tab 3

Research Article

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

Table 3

Temperature profiles and flow patterns of molten pools corresponding to temperature gradient of point A and point B and flow velocities of point B at different preheating temperatures during laser welding of aluminum alloy at 50 mm/s welding speed and 4 kW laser power.

Preheating temperatureTop viewLongitudinal section viewTemperature gradient of point A and point BFlow velocity of point B

273 K (ambient temperature)252 K/mm32 mm/s

373 K 279 K/mm65 mm/s

533 K298 K/mm70 mm/s