/diy/ - Do It Yourself

>>1062377
are ya talking about the picture? From the left its probably: cast with heat treatment

And then the directionally solidified and single crystal are typically variations of a sort of simple concept but fucking very hard to put into practice method. Basically
>put chunk of oriented "seed" crystal of the same metal on a water cooled crucible
>on top of that put a really fucking hot melt crucible with a hole in the bottom and melt down your metal
>slowly pour the liquidus onto the chilled seed
>metal crystallizes into same orientation of seed
>pass Go, collect $200

The single is a lot harder because you need to ensure that there is only one grain that influences the final crystal. So they basically use a really twisty tube (think of a duck vagina) that goes down to the chosen small seed and then when the liquidus contacts the cool seed it crystallizes the whole thing into that orientation.

Pretty cool, but a real strong pain in the ass if you want production quantity at a decent cost. There's a lot of government into "high entropy alloys" that can hopefully do the same thing but they are much simpler to produce.
>hopefully because if they dont its back to welding for this guy