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Selective modification of dual phase steel DP 1000 by laser action using diffractive optical element

S.P. Murzin1,2, M.V. Blokhin1

Samara National Research University,
443086, Samara, Russia, Moskovskoye Shosse 34,  
TU Wien, Institute of Production Engineering and Photonic Technologies,
1060, Vienna, Austria, Getreidemarkt 9

 PDF, 2167 kB

DOI: 10.18287/2412-6179-2019-43-5-773-779

Pages: 773-779.

Full text of article: Russian language.

Experimental studies of shaping a CO2 laser beam with a reflective diffractive optical element have been performed. To increase the aperture of the initial beam, we used a collimator containing a system of two plane-convex spherical ZnSe lenses. For the focal line formed with the diffractive optical element in combination with the collimator, in addition to a 1.3-fold increase in the length, a decrease in the maximum beam power density was found to occur in the laser spot. It was demonstrated that under the laser action it is possible to generate in a two-phase steel sample regions of full hardening, selective hardening, and annealing, alongside the initial structure. The formation of such structures is due to the distribution pattern of temperature fields and a difference in the cooling rate across the volume of the heat affected zone.

laser action, beam shaping, diffractive optical element, collimator, dual-phase steel, selective modification, structure.

Murzin SP, Blokhin MV. Selective modification of dual phase steel DP 1000 by laser action using diffractive optical element. Computer Optics 2019; 43(5): 773-779. DOI: 10.18287/2412-6179-2019-43-5-773-779.

The study was supported by the Russian Foundation for Basic Research, (Project No. 18-58-14001). Austrian Science Fund (FWF): Project number I 3920.


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