The influence of iron and silicon impurities on operational degradation of Al–Cu–Mg and Al–Zn–Mg–Cu alloys

Keywords

aluminum alloys, degradation, microstructure, physical and mechanical properties.

Cite as

Ostash O. P., Chepil R. V., Abolikhina O. V., Semenets O. I., Znova V. A., and Holovatyuk Yu. V. The influence of iron and silicon impurities on operational degradation of Al–Cu–Mg and Al–Zn–Mg–Cu alloys. Physico­chemical Mechanics of Materials. 2022. 58(2), 066-072.

Abstract

The micro- and nanostructure and physicomechanical characteristics of D16chТ, V95pchТ1 and V95pchT2 aluminum alloys (the foreign analogues of 2524-T3, 7475-T6 and 7475-T761 alloys, respectively) in as-received state and after model degradation, which simulates the influence of long-term exploitation of these alloys, are investigated. It is established, based on the obtained characteristics of strength σ_YS and σ_UTS, ductility δ₅, fatigue threshold ΔK_th, cyclic fracture toughness ΔK_fc and specific electrical conductivity σ, that with a decrease of the impurities content (silicon up to 0.08–0.18 wt.% and iron up to 0.2–0.23 wt.%) there is no their degradation under durable effect of temperature and force factors which simulate the operational factors.

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