7075-T6 Vs 7075-T7x
7075-T6 Vs 7075-T7x
(OP)
Hi all,
I'm currently researching a suitable material for a component I'm designing.
I've pretty much settled on 7075 aluminium, but I'm now seemingly faced with the choice between T6 or T73/T76. From what I can see, the T73/76 offers better resistance to SCC than the T6, but at a price of a reduction of around 10% in the proof and UTS.
Is this about right...or are there other things to consider between the two? I'm not a materials scientist by any manner of means, but I'm curious as to why the T7x temper seems to lose around 10% of its max Proof and UTS?
Any thoughts on any of the above would be very gratefully received.
Thanks
FP
I'm currently researching a suitable material for a component I'm designing.
I've pretty much settled on 7075 aluminium, but I'm now seemingly faced with the choice between T6 or T73/T76. From what I can see, the T73/76 offers better resistance to SCC than the T6, but at a price of a reduction of around 10% in the proof and UTS.
Is this about right...or are there other things to consider between the two? I'm not a materials scientist by any manner of means, but I'm curious as to why the T7x temper seems to lose around 10% of its max Proof and UTS?
Any thoughts on any of the above would be very gratefully received.
Thanks
FP





RE: 7075-T6 Vs 7075-T7x
RE: 7075-T6 Vs 7075-T7x
Bar will not be exposed to extremes of temperature, maybe highest at 50-60 deg C.
At first I was pretty sure T6 would be OK, as there are no notches or cuts in the bar to help start crack propogation. However, since it is in continuous operation, I'm maybe thinking it is worth sacrificing the extra strength for improved resistance to SCC. Mind you, I could do with as much strength as I can get, to keep a 'max stress to yield stress' ratio of 2:1, which is what I'm aiming for.
Why is engineering never simple....!
FP
RE: 7075-T6 Vs 7075-T7x
Regards,
Cory
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