SM-100 straightening ?

[shqxk]

Just got the sheet from SB-Specialty metals and it came warped and little twisted.

Anyone know how to straightening this stuff? its particled metal titanium-nickel alloy which can be hardened.

I thinking of clamp it on a bench vise and torch straightening like steel but still not sure if I gonna ruin this expensive stuff (over $400 spent for this single piece)

I have try contract the makers of the material but got no response at all.

 

[Rsq]

Look up its transition temperature in the annealed state they ship it. It may not have been heat treated to have memory, but one reason this stuff is so cool is that if it has, all you have to do is heat past its martensite transition temperature and it will restore itself to its previous form. Hopefully it was straight before it got bent, in which case it might just set itself.

I've never worked with nitinol to make a blade, but if you don't go nuts, I can't imagine you'll hurt it, and there is no easier way of fixing a bent bar. I've played with nitinol before just because I wanted to see it bend and fix itself.

 

[shqxk]

Look up its transition temperature in the annealed state they ship it. It may not have been heat treated to have memory, but one reason this stuff is so cool is that if it has, all you have to do is heat past its martensite transition temperature and it will restore itself to its previous form. Hopefully it was straight before it got bent, in which case it might just set itself.

I've never worked with nitinol to make a blade, but if you don't go nuts, I can't imagine you'll hurt it, and there is no easier way of fixing a bent bar. I've played with nitinol before just because I wanted to see it bend and fix itself.

Thanks you. I always thought of SM-100 as an inferior and hyped blade material. But I just want to try it myself.

Curious what is the hardening mechanism for this material since it contain just nickel and titanium but can be hardened to over 60hrc.

 

[Stacy E. Apelt - Bladesmith]

I would have to look at the protocol, butI would assume it is age/precipitation hardening. Something like heating to around 1800F and holding for a couple hours, then cooling.