Yep, one of the images at the bottom shows that they're welding flat sheets of metal together by using a capacitor bank to vaporize a foil sheet to provide a pl

Yep, one of the images at the bottom shows that they're welding flat sheets of metal together by using a capacitor bank to vaporize a foil sheet to provide a plasma blast that smashes the target metals together. So, yes, more controlled explosive welding.