Chris Fields
Well-Known Member
As for breaking a real sword you would have to make the blade extremely hard by heating and quenching it several times, this should make the sword brittle enough to break however there's no real easy way of controlling the break. The dremel option might work as metal tends to snap at the weak points but I seriously doubt you would be able to snap it along the length like it is in the prop.
the blade is stainless and does not harden in that manner. Also, for steels that do harden in that manner, you only have to do it once, not several times.
The only other way I can think of that you might be able to make a good shards replica is to make your own sword extra long from mild steel so cutting and shaping would be easy, once the bits are how you like them then heating and quenching them would work harden the parts making it seem like the whole sword was in one piece and then broken.
heat and quenching is not work hardening. and if it's mild steel, heat and quenching may not really effect the blade at all.