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Name: wayne y tanabe
Status: N/A
Age: N/A
Location: N/A
Country: N/A
Date: Around 1993


Question:
I am looking for information on the effects of cryogenically freezing non- ferrous metals (brass, copper, silver, and gold) down to temperatures as low as -375 F. Would like to know if it is possible to stress relieve these metals by freezing. Trying to remove residual stress left in these metals in the forming or shaping process. Can it be done? How much stress can be released? Where or who can I talk to in regards to this subject?



Replies:
I always thought that the annealing temperatures were pretty high (approxi- mately 500 C). Even though I am not a metallurgist, it would seem that the cryogenic temperature would "freeze" the state disallowing stress relax- ation.

david r munoz


Periodically I have heard bits and pieces about this idea of stress relief or other effects of taking brass to low temperatures, although never with any supporting data or information. Certainly conventional stress relief is done at high temp and would only slow down below rom temperature. It is conceivable that there are phase changes at low temperature, but off the top of my head, I doubt it.

edward p barth


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