Structural and Phase Changes in Concentrated V–Nb–Ta–Ti Solid Solutions Irradiated by Helium Ions

• Published in: Surface investigation, x-ray, synchrotron and neutron techniques Vol. 17; no. 1; pp. 208 - 215
• Main Authors: Uglov, V. V., Zlotski, S. V., Belov, M. M., Ryskulov, A. E., Jin, K., Ivanov, I. A., Kurakhmedov, A. E., Mustafin, D. A., Sapar, A. D., Bikhert, Y. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.02.2023; Springer Nature B.V
• Subjects: Chemistry and Materials Science; Compressive properties; Fluence; Grain boundaries; Helium; Helium ions; Irradiation; Materials Science; Niobium; Radiation tolerance; Solid solutions; Surfaces and Interfaces; Tantalum; Thin Films; Titanium base alloys; Vanadium; multicomponent solid solutions; residual stress; helium ions; high-entropy alloys; irradiation; radiation-induced defects
• ISSN: 1027-4510; 1819-7094
• DOI: 10.1134/S102745102301041X

The effect of irradiation by low-energy helium ions with a fluence of 2 × 10 17 cm –2 and an energy of 40 keV on the structure and phase state of V–Nb–Ta–Ti solid solutions is studied to obtain data on the radiation resistance of multicomponent solid solutions promising for use as structural materials of new generation reactors. It is established by scanning electron microscopy and X-ray diffraction analysis that the synthesized binary, ternary, and quaternary V–Nb–Ta–Ti alloys are equiatomic single-phase solid solutions with a uniform element distribution over the surface and compressive microstresses and macrostresses. It is shown that irradiation of the V–Nb–Ta–Ti alloys by helium ions leads to neither the decay of a solid solution nor violation of the uniform equiatomic distribution of elements over the surface. Irradiation by helium ions does not significantly change the level of microstresses and macrostresses in the VNb and VNbTa systems, while in the VNbTaTi alloy the compressive-stress level increases, which can be related to the segregation of elements to grain boundaries and the accumulation of helium-vacancy clusters.