INFLUENCE OF PULSED ION-BEAM TREATMENT ON THE STRUCTURE AND PROPERTIES OF THE ALLOY FORMED BY ELECTRON-BEAM PRINTING WITH VT6SV WIRE

A study of the microstructure and properties of a titanium alloy formed during electron beam printing with VT6cw wire after treatment with a pulsed ion beam has been carried out. The samples were obtained at a laboratory facility for electron beam additive manufacturing developed at IFPM SB RAS. The process of forming the samples was carried out by fusing titanium welding wire of the VT6sv brand with a diameter of 1.6 mm under vacuum conditions at a pressure of 10^‒3 ‒ 10^‒2 Pa. The energy effect using pulsed ion treatment was carried out on a TEMP-4M accelerator at an accelerating voltage of 200 kV, a pulse duration at half the maximum of 100 ns and an energy density of 2 J/cm². Transmission electron microscopy, atomic force microscopy, and microhardness measurements have shown that exposure to a pulsed ion beam leads to significant changes in the microstructure of the surface: the transformation of the β-phase into the α-phase is observed, as well as the formation of nanoparticles of the Al₃v intermetallic compound. The thickness of the modified layer is about 5.5 microns. A slight increase in microhardness was revealed (from 254.39 to 261.37 HV), while a more uniform distribution of hardness values was achieved. Ion beam treatment can help improve the biocompatibility of titanium implants by eliminating sharp edges that occur during machining and reducing roughness. In comparison with traditional methods of thermal treatment, ion treatment demonstrates a high degree of controllability and adaptability, which makes it promising for use in biomedical systems. The results obtained open up new possibilities for the functionalization of the surface of titanium alloys and have high application potential.

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