Influence of Tool Eccentricity pin Positioning on AA6061 Aluminium Alloy Friction Stir Welds

This study examines the influence of tool eccentricity pin positioning on AA6061 aluminium alloy friction stir welds. A laser scanning confocal microscope and optical microscope was used to analyze the surface roughness and the cross-sectional microstructure of the samples. Surface roughness analysi...

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Bibliographic Details
Published in:Key engineering materials 2023-05, Vol.946, p.3-8
Main Authors: Gerlich, Adrian, Hou, Wen Tao, Ahmad Shah, Luqman Hakim, Ramachandiran, Nivas
Format: Article
Language:English
Subjects:
Aluminum base alloys
Eccentricity
Friction stir welding
Laser beam welding
Microstructure
Optical microscopes
Surface roughness
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Summary:This study examines the influence of tool eccentricity pin positioning on AA6061 aluminium alloy friction stir welds. A laser scanning confocal microscope and optical microscope was used to analyze the surface roughness and the cross-sectional microstructure of the samples. Surface roughness analysis reveal the thread-to-flat (T2F) samples show rougher surface with increasing rotational speed up to 1400 rpm. On the other hand, the surface appearance of flat-to-thread (F2T) samples show minimal change. Cross-sectional microstructural observations show that the stir zone area of both groups increases with increasing rotational speed. However, the periodic bands in T2F and F2T samples increases in the upper region and lower region of the stir zone, respectively.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/p-o2bg08