Simulated Enhanced Buoyancy Convection on structure of 304 GMA Welds

摘要

The purpose of this research project is to examine the effects of "simulated" enhanced buoyancy convection on gas-metal arc (GMA) weld bead geometry of 304 stainless steel welds at various "simulated" gravity conditions (g-levels). It was evident that gravity did have an effect on shape and geometry of the weld zone. The 4g and 8g welds had wider but shallower weld zones. The competition among the main convective forces such as Buoyancy, Lorentz, and Marangoni can significantly alter the weld zone aspect ratio as well as the shape.