Retained Austenite in 17-7PH?

[rms1956]

I'm looking for articles/papers on retained autenite in 17-7PH SS. Particularly interested in articles/papers contianing photos of evidence in the microstructure.

Thanks

 

[CoryPad]

Use free search engines.

Google Scholar:

http://www.scholar.google.com

Scirus:

http://www.scirus.com

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[NickE]

17-7 has a very complex microstructure, in the annealed form I am certain its mostly austenitic. When heat-treated to eitehr RH or TH conditions I would expect that the structure still contains significant austenite.

Also I'd expect convesely that CH condition material is completely martensitic.


Nick
I love materials science!

 

[swall]

I just took a look at some old 17-7 CH900 micros I had and there is perhaps 10-15% of a lighter etching phase. If memory serves me correct, this is delt ferrite.

 

[NickE]

Thanks, I did start a bit of research into 17-7, but working in a more production environment stalled the research, all the samples are ready an labled, but I never really was able to start the next steps. Ugh..

 

[Robertmet]

Retained austenite seems to be everywhere !! It can be found in low carbon martensite and even bainite ! Now that we can get to 1,000,000X we can see lots of things like G-P zones and dislocations !