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Fatigue Testing of Impact Spot Welds

Spot welding of sheet metals using Vaporizing Foil Actuator Welding (VFAW) allows joining of a wide range of metals while producing little to no HAZ.  This novel solid state spot welding technique results in a joint with higher strength while requiring less energy than with conventional welding.  As an alternative joining method in comparison to other impact welding techniques, this technology enables the creation of multi-material lightweight structures. Fatigue testing can evaluate the strength of the spot weld under quasi-static and fatigue loading conditions and is extremely important to the overall structural integrity, durability and safety of automobiles.