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Fig9

Surface relief in Fe-0.46C-0.21Si-0.74Mn-0.10Cr-0.08Ni-0.01Mo wt% sample, following laser surface-treatment at 10 mm/s which resulted in partial austenitisation. The sample is located away from 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. The smooth parts of the relief correspond to ferrite from the original microstructure. Hardness 440 HV