Abstract
An aluminum projectile was impact-welded on a titanium target using a nitrogen gas gun at impact velocities of 200m/s or more. Effect of thickness of the target on the compound layer at the joint interface was examined regarding some points. The bonding area was estimated using scanning acoustic tomography. The microstructures and element distribution in the joint were analyzed by means of SEM and Energy dispersive X-ray spectroscopy. The bonded area did not depend on the thickness of the target, but increased with the impact velocity. The increase in the thickness of the target caused a decrease in the maximum thickness of the compound layer formed at the joint interface because of the increase in deformed volume. However, the concentration of the elements in the compound layer varied very little with the impact velocity, thickness of the target and position in the layer.
