Investigation of the nugget zone corrosion behavior in friction stir welded lap joints of 6061-T6 aluminum alloy

AUTOR(ES)

Gharavi, Farhad, Matori, Khamirul Amin, Yunus, Robiah, Othman, Norinsan Kamil

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

2014-12

RESUMO

The corrosion behavior at different positions (top and bottom) of the weld nugget zone along the thickness plates in AA6061-T6 aluminum alloys welded by friction stir lap welding, under the conditions of 1000 rpm-60 mm/min and 900 rpm-40 mm/min in a 3.5 wt% NaCl solution, was investigated by Tafel polarization at ambient temperature. The morphology of the nugget zone corroded surfaces was analyzed by scanning electron microscopy together with energy dispersive spectroscopy (SEM-EDS) as well as atomic force microscopy (AFM). It was found that the top half of the nugget zone has a better corrosion resistance than that of the bottom half for both welding conditions. A localized pit dissolution with combined intergranular corrosion are the dominant corrosion types across different positions of the nugget zone for various welding conditions and in the parent alloy.

Documentos Relacionados

• Corrosion behavior of friction stir welded lap joints of AA6061-T6 aluminum alloy
• Submerged Friction Stir Welding of 6061-T6 Aluminium Alloy under Different Water Heads
• Effects of Geometrical Feature on Microstructures and Mechanical Properties of Refill Friction Stir Spot Welding 6061 Aluminum Alloy
• Effect of Preheating on Microstructure and Tensile Properties of Friction Stir Welded AA7075 Aluminium Alloy Joints
• Numerical modeling of welded joints by the "Friction Stir Welding" process