Contact: Michael Baum
National Institute of Standards and Technology (NIST)
Caption: The four images (taken with scanning laser confocal microscopy) show variations in surface roughness of an aluminum alloy as produced by increasing amounts of strain: A-1 percent, B-4 percent, C-8 percent, and D-12 percent.
Credit: Mark Stoudt, Joseph Hubbard and Stanley Janet, NIST
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