Naslov
Tensile behaviour of mig welded hydrogenated Al-alloy EN AW-5083

Autori
Dolić, Natalija ; Malina, Jadranka ; Kožuh, Zoran ; Garašić, Ivica ; Tunić Jozef

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

Izvornik
8. Europsko savjetovanje Eurojoin 8 : zbornik radova = 8th European Conference : proceedings / Kožuh, Zoran - Zagreb : Hrvatsko društvo za tehniku zavarivanja, 2012, 687-696

ISBN
978-953-7518-02-8

Skup
European Conference on Welding, Joining and Cutting (8 ; 2012)

Mjesto i datum
Pula, Hrvatska, 24.05.2012. - 26.05.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
MIG double-side welding; electrochemical hydrogenation; mechanical properties; microstructure; as-cast aluminum alloy EN AW- 5083
(MIG zavarivanje; elektrokemijsko navodičenje; mehanička svojstva; mikrostruktura; lijevana alumnijska legura EN AW-5083)

Sažetak
In this paper the influence of hydrogenation on mechanical properties and microstructure of MIG double-side welded EN AW-5083 aluminium alloy was investigated. According to the results obtained from tensile tests, there was no significant difference in yield and tensile strength between uncharged and H-charged weld, but elongation and contraction were decreased in the hydrogenated specimen. Such tensile behaviour suggests that hydrogen was absorbed in amount high enough to cause the embrittlement of welded joints, which is confirmed by embrittlement index IHE = 20.9%. Detachment between base metal and weld started at the weld-root and afterwards the main crack continues spreading along the fusion line characterized by as-cast microstructure with fine equiaxed columnar grains. A great number of grain boundaries could be considered as H-traps and the sites from where initial microcracks start.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija, Strojarstvo

POVEZANOST RADA