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Fig8

Surface relief in Fe-0.16C-0.26Si-0.96Mn-0.11Cr-0.12Ni-0.02Mo wt% sample, following laser surface-treatment at 5 mm/s which resulted in a much greater degree of austenitisation. The sample is located at the centerline of the laser track. The regions of pearlite which transformed into austenite in the heating cycle, changed into martensite during cooling, resulting in surface displacements. There is only a small quantity of ferrite. Hardness 410 HV