Cryogenic Quenching
Cryogenic Quenching
(OP)
Studying the effects of various heat treatments for Aluminum alloy A319, one idea was to change the quenching medium after heating into solid solution. I decided to quench in liquid nitrogen and dry ice. After quenching and aging for two hours I conducted tensile tests. For the two quenching mediums, I recieved similar results for maximum tensile strength and ductility, however the yield strength for the dry ice quenched samples was significantly higher. I was wondering what would be the cause of this.





RE: Cryogenic Quenching
RE: Cryogenic Quenching
Liquid gases will give rather slow cooling rates because of the surface boiling film.
My guess is that the quench rate in dry ice was faster. You could use a thermocouple and see.
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RE: Cryogenic Quenching
RE: Cryogenic Quenching