How Chipping of Edges Happens at a Microscopic Level

[dkb45]

It wasn't so long ago that I asked you to provide the proof in these magazine articles pertaining to CPM steels. Nothing, despite being asked by so many to cite your sources..Credible sources.
Whenever you are asked a legitimate question in regards to your wild assertions, you ignore it only to pop up in a thread days later with more of the same.
You aren't contributing anything of use to the community but you are hurting those that come here to learn. It's really hard for anyone to separate the wheat from the chaff.

Your time sprinkling the forum with turdlets has come to an end.

You... you finally did it.

 

[Larrin]

Larrin So would the retained austenite that transforms to untempered martensite that can close the crack eventually, under continued high stress low cycle or low stress high cycle, eventually be detrimental because it's untempered martensite? Or is it "shielded" somehow within the "matrix"?

My guess is that a scenario can be created where the untempered martensite is detrimental. The question is how common are those scenarios and should we worry about them. I am not arguing that cryo is bad.

 

[danbot]

I find this all very interesting! I never would have guessed that retained austenite could transform into untempered martensite under stress! Where does bainite come into play? Or am I getting way ahead of myself here?

 

[Larrin]

I find this all very interesting! I never would have guessed that retained austenite could transform into untempered martensite under stress! Where does bainite come into play? Or am I getting way ahead of myself here?

I will be writing a mega article or two on bainite at some point. Along with 50 other topics.

 

[danbot]

Cryoed, no chippy.

Show me which way the grain is going on this sheet of steel? Is it rolling or transverse?

If you etch it you can see.