Characteristics of dissimilar FSW welds of aluminum alloys 2017A and 7075 on the basis of multiple layer research

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Dyscyplina naukowa:
Rok:
2013
Typ publikacji:
Artykuł
Słowa kluczowe:
advanced characterization, aluminum, joining, metallography, optical microscopy, welding
Autorzy:
  • K. Mroczka
  • Anna Wójcicka
  • A. Pietras
Czasopismo:
Journal of Materials Engineering and Performance
Ilość:
22
Numer:
9
Strony:
2698-2705
Miesiąc:
Maj
ISSN:
1059-9495
Punkty MNiSW:
20
Impact Factor:
0.981
Streszczenie:
This work is concerned with the structure of the FSW joint of 2017A/7075 aluminum alloys, which was analyzed on the basis of a number of longitudinal and cross-sectional sections. Various ways and degrees of alloy stirring were identified, depending on the distance from the face of the weld. Furthermore, considerable variation in the length of the weld microstructures was demonstrated, reflecting the variability of the welding process. Studies of mechanical properties are also presented—the distributions of hardness on individual layers. A significant effect of plastic deformation on the hardness of the alloy 7075, which strengthened in deformed areas and shows weakness in the heat-affected zone, was noticed. The influence of the weld structure on the fracture of the sample, which was broken in the static tensile test, was analyzed applying scanning electron microscopy. The presence of non-deformed areas was revealed within the ductile fracture of the sample.

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