Posted by Rick Denney on January 31, 2001 at 22:45:21:
In Reply to: Re: Re: cryogenic tuba freezing posted by Carl L on January 31, 2001 at 20:54:32:
I'm an engineer, but no metallurgist. I know how to design structures with materials, but not much about what's going on at the molecular level.
I know that heating will allow the molecular structure to become reoriented (or perhaps "deoriented" is a better descriptor). This is called annealing, and it reduces yield strength and brittleness. I've never heard of using cryogenic freezing to accomplish the same thing outside the musical instrument trade, but that is probably just because I've never looked into it. Even so, I wonder at the effect of annealing, which doesn't change the stiffness of the material at all.
The tests I've seen of the results seem to reveal nothing much, especially for tubas.
Rick "not planning to freeze my tubas" Denney