Skateboard Cap Screw (3/8-24 size):
The microscope is an Olympus SZH stereo; the camera is an Olympus e-Volt E-500.
This
is an example of
reversed low-cycle bending fatigue. If you right-click on a selected
image, you can then view it at full resolution in a new browser
window. The 8X image shows the arrest lines when so viewed. The 64X
images don't, because they were mashed against the mating faces before
the screw broke. That's why we can tell that the loading was in
reversed bending.
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