Keep in mind that this is still very much a press release, so of course it manages to sensationalize. These metal combinations are only "un-weldable" via fusio

Keep in mind that this is still very much a press release, so of course it manages to sensationalize. These metal combinations are only "un-weldable" via fusion welding, other solid state welding techniques (like explosive welding, as others have noted) can accomplish this as well. Furthermore, looking at the papers on the technique [1][2] the increased weld strength has only been observed in a few combinations of alloys and isn't significantly greater than other collision based methods. While the energy and scale reductions this accomplishes are worthy of praise, geometry restrictions, intermetallic generation and fatigue behavior within these welds are still issues. [1]http://www.sciencedirect.com/science/article/pii/S092401361300232X http://www.sciencedirect.com/science/article/pii/S0924013613... [2]http://link.springer.com/article/10.1007%2Fs11661-014-2404-0 http://link.springer.com/article/10.1007%2Fs11661-014-2404-0