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Fig10

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 complete austenitisation. The sample is located at the centerline of the laser track. The austenite then transformed into martensite during cooling, resulting in characteristic surface displacements. Hardness 715 HV