IIRC, US coin stock is laminated explosively. The layers of (clean) metal
are sandwiched between layers of explosive. When detonated, the effect is
to pressure-weld the metals.

(this seems to me not to be a process well suited to continuous
mass-production?!)


I don't remember if platens are used between the target and the explosive
composition.

LLoyd


wrote in message
oups.com...
I haven't had much luck in searching on how sheet metal can made. In
particular I want to make small sample sheets with a few layers of
metals or alloys. I know this can be done, because for example some
coins are made from 3 metal layers described as 'fused' or bonded
together.

Anyone have any idea or know any books on this subject of metals fusing
(not being alloyed, but just physically bonded together) together?
-Joe