Effect of tool pin geometry and weld pass number on microstructural, natural aging and mechanical behaviour of SiC-incorporated dissimilar friction-stir-welded aluminium alloys

The aim of this investigation was to study the effect of tool pin geometry and pass number on mechanical and microstructural behaviour of SiC-incorporated dissimilar friction stir welding of 6-mm-thick plates of AA6061-T6 and AA2024-T351. Two tool pin geometries, square and triangle frustum, were us...

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Bibliographic Details
Published in:Sadhana (Bangalore) 2019, Vol.44 (1), p.1-9, Article 9
Main Authors: Moradi, Mohammad Mahdi, Jamshidi Aval, Hamed, Jamaati, Roohollah
Format: Article
Language:English
Subjects:
Aging (metallurgy)
Aging (natural)
Aluminum base alloys
Dissimilar material joining
Engineering
Friction stir welding
Frustums
Grain size distribution
Mechanical properties
Thick plates
Triangles
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Summary:The aim of this investigation was to study the effect of tool pin geometry and pass number on mechanical and microstructural behaviour of SiC-incorporated dissimilar friction stir welding of 6-mm-thick plates of AA6061-T6 and AA2024-T351. Two tool pin geometries, square and triangle frustum, were used. It was found that the weld made by square frustum pin and two passes with rotation in the same direction produces more homogenized and finer distribution of SiC particles. Also, the grain size of stir zone in the weld made by two passes is finer than that made by one pass. The weld made by triangle frustum pin shows higher thermo-mechanically affected zone hardness, natural aging kinetics and tensile strength than the others.
ISSN:0256-2499
0973-7677
DOI:10.1007/s12046-018-0997-5