Mysterious blue particles in A356 aluminum castings
Mysterious blue particles in A356 aluminum castings
(OP)
On the metallograph, there are some blue colored particles. The only thing I can guess is that it might be from light diffraction hitting oil or some residue polishing compound, however I have my doubts about this because it is restricted to the particle itself?
Do you have any explanations for the appearance of these blue particles after viewing at 100, 200X, 400X, etc?
Do you have any explanations for the appearance of these blue particles after viewing at 100, 200X, 400X, etc?





RE: Mysterious blue particles in A356 aluminum castings
Maui
RE: Mysterious blue particles in A356 aluminum castings
i would narrow it down to one of three things
silicon based either primary crystals
titanuim or Ti-B
Mg particles - unliklel
I used to have a boo that told you what elements showed up l;ike under etchant, did you use kellers reagent?
RE: Mysterious blue particles in A356 aluminum castings
RE: Mysterious blue particles in A356 aluminum castings
Mg2Si particles are blue.
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RE: Mysterious blue particles in A356 aluminum castings
RE: Mysterious blue particles in A356 aluminum castings
RE: Mysterious blue particles in A356 aluminum castings
Also a general forums based question. How long does a thread stay on here after being inactive. My interest is basically what happens after no responses have been made for 6 months or a year. Does it get deleted? I know some forums that go back 2-3 years, just curious about this one, because it'd be great to refer back to these. I think to be safe, I'll just save them from time to time.
RE: Mysterious blue particles in A356 aluminum castings
nick
RE: Mysterious blue particles in A356 aluminum castings
Currently, all posts are kept. This policy may change, although I think this is highly unlikely.
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