Because of reasons, I need a sword that needs to be on fire and still be effective. I've found nitinol, a shape memory alloy that when hot reverts to a preconfigured shape. If it reverts, would it actually STAY in shape when it's thrusting or slicing an opponent? According to this other forum it should work as good or better than steel as a standalone blade when at room temperature.
As for being on fire, I need it to burn for at least 10 minutes, but 30-60 minutes would be very convenient. I figured it could have a small tungsten shell hollow built into the spine of the blade (single-edge blade) that has a store of oil inside. This would communicate heat to the blade but still take the brunt of the heating effect. Otherwise the character could carry an urn of oil and just lather the blade with it, but how long would you conjecture that would last?
Character is 1.5x stronger than a warrior-joe, so there's some leeway in terms of weight though not a whole lot.
As an extension to the initial I thought I could take some magical liberty and say that's a blade that never loses its edge because it uses the thermal energy running through it to maintain edge alignment and structural integrity.
Could all of this work? Or at least is it a small stretch? Thanks!