Effect of ion irradiation on low-cycle fatigue of pressed profiles of the V95 alloy after artificial aging

Abstract

The effect of 20-40-keV Ar+ ion irradiation on the fatigue resistance of hot-pressed V95 alloy (Al-Zn-Mg-Cu system) profiles 6 mm thick after quenching and artificial aging (140°, 16 h) has been investigated. The use of the irradiation conditions (E = 40 keV, j = 500 μA/cm2), under which the profiles were briefly heated to a temperature of 200°C, is found to reduce the strength properties of the alloy significantly, which does not meet the specified requirements. Irradiation conditions, which enable one to avoid significant heating of a target at E = 20 keV and j = 400 μA/cm2, do not affect the fatigue resistance significantly at all fluences of F = 1•1015, 1•1016, 1•1017 cm-2. © 2019 IOP Publishing Ltd. All rights reserved.