Naslov
INFLUENCE OF HYDROGEN ON MECHANICAL PROPERTIES OF AS-CAST Al-ALLOY EN AW-5083

Autori
Dolić, Natalija ; Malina, Jadranka ; Zovko Brodarac, Zdenka

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of 44th International October Conference on Mining and Metallurgy - IOC 2012 / Kostov, Ana ; Ljubojev, Milenko - Bor : Mining and Metallurgy Institute Bor, 2012, 507-510

ISBN
978-86-7827-042-0

Skup
44th International October Conference on Mining and Metallurgy - IOC 2012

Mjesto i datum
Bor, Srbija, 01.10.2012. - 03.10.2012

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Al-alloy EN AW-5083; electrolytic charging with hydrogen; mechanical properties

Sažetak
Contact of aluminium alloys with aggressive solutions in service often results in evolution of hydrogen gas. It is a by-product of the main corrosion reaction Al → Al3+. Hydrogen atoms adsorbed at the surface can enter the metal so that their presence in crystal lattice can lead to microstructural cracks followed by unexpected failures. In order to see the influence of hydrogen on mechanical properties of as-cast aluminium alloy EN AW-5083, in this study tensile specimens of the alloy were H- charged in corrosive solution (0.5 M H2SO4) at appropriate cathodic potential. Tensile behaviour has shown that mechanical properties like yield strength and tensile strength remain almost unchanged when comparing noncharged and H-charged specimens. However, deleterious effect of hydrogen in metal was manifested through the loss of plasticity. Contraction Z in hydrogenated specimens was significantly lower, because of H trapped at different microstructural constituents. SEM observations on the fractured surfaces confirmed the findings from tensile tests.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija

POVEZANOST RADA