Abstract
High energy-rate metalworking has significant advantages, in that short time scales change the fundamental nature of the forming process and short duration impulses can be used with much lighter and more agile equipment because large static forces do not need to be resisted. Here, we propose the use of thin aluminum foils that are intentionally vaporized by a pulsed electric current, in order to create an intense mechanical impulse. The driving pressures can be a few GPa's, and have been used to launch sheet metal workpieces to velocities in excess of 1km/s. Applications including impact welding, forming, embossing, shearing, and powder compaction have been demonstrated and will be presented in this paper.
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