For anyone still interested, heres the Impulse Manufacturing Laboratory at OSU channel on Youtube:
https://www.youtube.com/channel/UCKw...4kIfJ1Q/videos
They have ten videos up. Similar to hydroforming, this is a process that allows small scale forming and welding that would be done with explosives on a larger scale. Generally the forms for something the size of the palm of your hand is constructed with 1 1/2" steel plates and 3/4" bolts. The explosive foil is like an old VW Beetle fuse (both types!). And it's set off inside a blast cabinet.