Use of alum alloy at high temp, high vacuum
Use of alum alloy at high temp, high vacuum
(OP)
Hi all,
I am looking for more info on the use of alum. alloy at higher temperatures (300 degr.C) and under high vacuum conditions (10-5 Torr). Is material diffusion (Zn) an issue when using the material for 2 weeks under this condition ? Any other pro/cons known ?
I am looking for more info on the use of alum. alloy at higher temperatures (300 degr.C) and under high vacuum conditions (10-5 Torr). Is material diffusion (Zn) an issue when using the material for 2 weeks under this condition ? Any other pro/cons known ?





RE: Use of alum alloy at high temp, high vacuum
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RE: Use of alum alloy at high temp, high vacuum
Regards,
Cory
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RE: Use of alum alloy at high temp, high vacuum
My main concern is the diffusion of Zn, which will occur for sure, but will it be relevant in 2 weeks of testing at 300 degr. C ??
RE: Use of alum alloy at high temp, high vacuum
Bulk content of alloys controls the modulus, the 7xxx series of Al alloys (the ones with Zn in them) have aproximately 88%wt Al, thus governing the slope of the elastic portion of the stress/strain curve.
Looking in my GEM - AM&P Dec. 2001 -- I see that 2024/6061 are right around 73GPa and 7079 is given as 71GPa. so around 3% difference.
How about using an alloy that contains no Zn?
Nick
I love materials science!