Vaporizing foil actuator welding: Joining by impact

Vaporizing foil actuator welding (VFAW) uses the pressure from an electrically driven explosion to impact-weld dissimilar metals at high speed. It does this by changing a thin metal foil from a solid to a gas and using the pressure to push one base metal—over a short, controlled distance—toward another base metal. This all happens within millionths of a second, with impact speeds about twice the speed of sound in air…

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