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Indentation hardness HIT across the 100Cr6 steel surface, tested in three different regions: polished (black triangles), fs-laser processed (LSFL-covered, blue squares), and across the center of an RSTT wear track (RSTT: normal force 1.0 N, stroke 1 mm, frequency 1 Hz, cycles 100,000, Castrol VP-1) in the fs-laser-processed (LSFL-covered, red circles) area.
