The thermal treatment and the study of the size of the martensitic a grain obtained after the melting state of the TA6V treated by the continuous wave CO2 laser

Abstract FRE

The laser energy is transformed on the surface (} / 'metallic specimen a! Thermal energy or heal, this Ileal diffuses to the interior of the specimen,! or the same kind of material with same surface preparation, only Ram, 'wave laser parameters which are matched together in the following relation : Os p 2, S '(Os is the specific energy deposed at the surface, vis the interaction time ands IS the surface Ea / aa / ? is lighted by the laser t AA) AA this fad or which indicates if the laser treatment can be performed without microslructural modification or melting ofthe material.

Titanium alloy Ti-6 ? 0.ll-4 % l M'flf.

v surface melted using a ('() ; laser beam.

Depth ofthe melted ? one may up to 4 mm.

The mariensitic phase a 'obtained after the laser treatment IS melastahle, with small grain size compared with those 114' can obtained in the case ofthe classical thermal treatment.

The resulting microstructure of the melted?