Abstract
The effect of 20-40 keV Ar+ ion irradiation on the mechanical properties and structural and phase state of hot-pressed profiles 6 mm thick made of an V95 alloy (Al-Zn-Mg-Cu system) after artificial aging has been studied. Irradiation (without causing heating) at fluences of 2∙1015 cm−2 and 1 ∙ 1016 cm−2 has been revealed to increase the relative elongation by 5%, without changing the strength characteristics. Electron microscopy examination has showed that irradiation has an effect on the state of the subgrain structure of the alloy. Irradiation at these fluences results in partial enlargement of the subgrain structure, and at higher fluence of 9.4∙ 1016 cm−2 it completely transforms the structure into coarse-grained one. At a distance of 150 μm from the irradiated surface, there is a slight increase in the subgrain size. The irradiation changes the morphology of Al6(Fe, Mn) intermetallic compounds in both the surface layer and the sample volume; namely, it sharply decreases the bulk density of lath-shaped intermetallic compounds and increases the density of the equiaxed ones. The degree of influence depend on the irradiation mode.
Highlights
This work is aimed at studying the mechanical properties, structure, and phase composition of V95 alloy samples cut from 6-mm-thick hot-pressed profiles in their initial state after artificial aging (T = 140 oC, 16 h) and after their subsequent Ar+ ion irradiation at ion energies of 20–40 keV.Alloy V95 is one of the most universal and widespread construction materials of the Al-Zn-Mg-Cu system
The irradiation changes the morphology of Al6(Fe,Mn) intermetallic compounds in both the surface layer and the sample volume; namely, it sharply decreases the bulk density of lathshaped intermetallic compounds and increases the density of the equiaxed ones
This work showed that 20-keV Ar+ ion irradiation had an influence on the mechanical properties and the structural-phase state of the 6-mm-thick hot-pressed and artificially-aged V95 alloy profiles
Summary
This work is aimed at studying the mechanical properties, structure, and phase composition of V95 alloy samples cut from 6-mm-thick hot-pressed profiles in their initial state after artificial aging (T = 140 oC, 16 h) and after their subsequent Ar+ ion irradiation at ion energies of 20–40 keV. The artificially-aged V95 alloy has a high corrosion resistance. The V95 alloy has the maximum strength, but its plastic properties are low. It is of interest to search for opportunities to enhance the microstructure and plastic properties of the alloy using ionbeam treatment, which has been successfully proven in recent years as a technique for a specific modification of the properties of functional materials.
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