I spent a bit of time today looking at the surfaces of a metal component that had fatigue fractured, and ended up taking some photos for the report. If I'd remembered to take the correct lens with me, I might even have posted one here, but alas I did not.
Therefore, you'll have to make do with this snackro of the fracture surface of a Matchmaker chocolate instead.
It's much tastier, and a lot less chewy than a lump of steel, I'll give it that much.
This one's a 3x magnification photo (plus a minor crop), and is a stack made up of 37 frames.
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