Mechanical Behavior of Friction Stir Welded Powder Metallurgy Aluminum Alloys and Composite


Friction stir welding (FSW) is a solid state joining technique. This makes it an attractive joining method for aluminum alloys and composites produced by a powder metallurgy route. In this study, the mechanical behavior of both a powder metallurgy monolithic aluminum alloy and composite were evaluated, i.e., IN 9052 and 7093 Al-SiC. Mini-tensile specimens were used to determine property variations in different FSW regions including the weld nugget, the thermo mechanically affected zone adjacent to the nugget, and the parent metal. A comparison of the microstructures and mechanical properties of these regions revealed no damage to the SiC particulates in the friction stirred region. The grain sizes in the nugget region of both materials also remained comparable to the fine-grained parent materials. These are significant advantages of FSW over fusion welding techniques.


Materials Science and Engineering

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Article - Conference proceedings

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Publication Date

01 Dec 2001

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