Interaction of lasers of various types with alloys based on Ni and Ti

Abstract

Commonly implemented nickel and titanium alloys are nowadays alloyed with many new elements. Obtained in this way, new Ti-alloys are of great practical significance in aircraft industry, while Ni-alloys are important in energetic and nuclear technique. Selected alloys of titanium and nickel have been treated in vacuum by various thermo-mechanical regimes. Most of the samples have been exposed to laser beams in the air, at the atmospheric pressure, while some of the samples have been treated in vacuum conditions. Laser-induced modifications of the samples microstructures have been analyzed by various methods of investigation, which include optical- and electron microscopy (SEM). The heating up of the selected Ni- and Ti-alloys to the melting point, in selected regimes of laser operation, has been simulated by contemporary numerical methods.

Savremene legure na bazi nikla i titanijuma, sa većim brojem novih elemenata, imaju široku primenu. Tako dobijene nove legure titanijuma su od velikog praktičnog značaja u vazduhoplovstvu, a novodobijene legure nikla u energetici i nuklearnoj tehnici. U okviru ovog rada su prikazani rezultati tretiranja legura titanijuma i nikla snopovima lasera u vazduhu, na atmosferskom pritisku, kao i pojedinih uzoraka u vakumskim uslovima. Dobijene laserske modifikacije mikrostruktura uzoraka su analizirane različitim metodama ispitivanja, koje uključuju optičku i elektronsku mikroskopiju (SEM). Savremenim numeričkim metodama je, za izabrane režime rada lasera, simulirano grejanje do tačke topljenja odgovarajućeg materijala.