7050 Aluminum Alloy Microstructure

[SMF1964]

Does anyone have a reference I can access that will show the microstructure for 7050 aluminum (T7452 heat treated condition)? I have an impeller reportedly machined from a forged 'billet' and would like to compare the microstructure I have with what is typical for this condition.

 

[mfgenggear]

OP
There should be examples in the ASM heat treating hand book. Don't remember the upto date volume.

 

[mfgenggear]

OP
Also AMS material specification for this material for castings and wrought material.

 

[SMF1964]

Thanks for the suggestions. My copies (the Red volumes) don't have microstructures in the HT volume (Vol 4) and the metallography & microstructures only have 3 images, from plate. I'll dig around for the AMS spec literature.

 

[EdStainless]

the current ASM handbook is two volumes newer than yours.
There also is an ASM specialty handbook on Al alloys that might help.

 

[WKTaylor]

What was the material spec for the forged billet [block, etc]? What were the finished dimensions for the billet?

Was the forged billet HT processed to the -O1... or directly to the -T7452?

Did the billet have material certifications from the processor? IE...

What was the forging spec? Was billet grain size/control/flow checked? Chemistry/hardness/conductivity/tensile Checks?

Was a thru-ultra sonic required... in multiple orientations... and to what class was the block rated? Typical ASTM B594

Was this the billet a one-of-a-kind... or was-it-one of many in a lot 'heat'?

Has the impeller been 'in-service'?

/NOTE/ 7050 is a well-studied alloy with there are many technical papers many ... but know basic info on the raw-stock is a big starter.

I design lots of replacement parts from 7050 forged block and plate... raw stock certifications are the starting point.

If find the concept of an aluminum 'impeller'... with high rotation speed and fluid thrust... and likely vibrations and/or cavitation... a bit unnerving.

My head hurts... thinking too hard about this...