Polymer Man wrote:

If only there was some way of heating up an area between the two
pieces, so both would become molten, then solidifying into a single
unit. But is that possible due to the melting temperature? It think it
melts at 2 bazillion degrees, or something like that...


HUH? Aluminum alloys melt at somewhere near 600 C / 1200 F, quite
low compared to steel, for instance.

Perhaps someone could construct some kind of tool that could use an
electric arc as a heat source and inert gas as a shield... I guess you
could use tungsten as an electrode and argon as an inert gas source.
You could call it tungsten inert gas welding, or "TIG" for short.....



Oh, OK, you've already heard of this, then.

Jon