Posted by David F on February 02, 2001 at 03:11:48:
In Reply to: Re: Re: Re: Re: cryogenic tuba freezing posted by Daniel C. Oberloh on February 02, 2001 at 01:32:10:
I work for a leading microwave electronics company. Nearly all amps & devices working in thermal ranges from 120 "C" degrees below zero to 120 above which fail do so from metalic failure. Materials for connections, housings, fixtures, substrate carriers etc. are same as tubas. Quite often using the same basic solder type joints (over simplified of course). The same AMPS that are not exposed to these temperature ranges never seem to fail this way.
Me thinks proper annealing before all parts go together is correct.
remove the stress before it goes together, not just in the joint but in the METAL.