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Close look at Para 3 Maxamet Edge

Anyone know what the little white balls around the edges in the high mag photos mean? Some kind of alien flying saucer maybe?

Where Mr. Steel Guy when we need him?
 
GatorFlash1 said:
Anyone know what the little white balls around the edges in the high mag photos mean? Some kind of alien flying saucer maybe?

Where Mr. Steel Guy when we need him?
Click to expand...
I was curious about those to so I ran an EDS (X-Ray) map. The white dots correspond mostly to high concentration regions of vanadium (V) and tungsten (W). Interesting to see powdered metals and the dispersions of the metals in the matrix.
https://imgur.com/561ofIb
 
mblanton said:
I was curious about those to so I ran an EDS (X-Ray) map. The white dots correspond mostly to high concentration regions of vanadium (V) and tungsten (W). Interesting to see powdered metals and the dispersions of the metals in the matrix.
https://imgur.com/561ofIb
Click to expand...
That pictures too small to see.

Yes these steels are making complex carbides that boost the wear resistance and strength.

These carbides are harder than the surrounding matrix.

Maxamet is composed of M6C and MC carbides.

White ones are M6C with are mainly rich in Iron and Tungsten with lower vanadium and chromium and carbon.

Hence they are softer at 1800Hv than the darker grey MC carbides at 2800Hv which are richer in Vanadium and Carbon with lower amounts of the other metallic elements.
 
I’ll add more pics of other blade steels from time to time. I don’t own a Rockstead but agree that it would be interesting to see. Also limited in size to about 3.5” in length as to what can fit in our SEM chamber i.e. folders are disassembled to fit and actually be able to pump down the SEM chamber to a workable pressure (~10^-5 Torr) in a reasonable amount of time.

DeadboxHero - I agree the pic is a little too small. Much easier to see in the native software I use for EDS on a 24” monitor. Relegated to screen shots to get something I can post.
 
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