Surface marking method of an engine piece gas turbine by a graphical representation PREDEFINED

The invention relates to a marking method on the surface of an engine part to gas turbine by a predefined graphic representation comprising applying by means of a laser source, a single laser pulse on an outer surface a workpiece to be marked with the interposition between the laser source and the outer surface of the part of a mask having a predefined graphic representation, the laser pulse having a power flux of 20 MW / cm2 and a duration less or equal to 100 ns.