Underwater explosive welding of thin tungsten foils and copper

This study demonstrates the ability to clad pure tungsten foils on copper plate using underwater shock waves generated by the detonation of explosive. Microstructural characterization revealed that a higher preset inclination results in wavy morphology. Weld formed at lower inclination exhibit a planar interfacial layer comprising fine grained particles of both components. The plastic flow of tungsten is ascribed to the synergistic influence of high pressure and high strain rate at the collision point.

► Underwater explosive welding was used to clad tungsten and copper. ► The preset inclination was varied and the microstructure was observed. ► Microstructure reveals a clear wavy interface for higher preset inclination. ► High pressure and high strain rate leads to plastic flow of tungsten.