Title: Peak temperatures and microstructures in aluminium and magnesium alloy friction stir spot welds
Abstract: The peak temperatures during friction stir spot welding of similar and dissimilar aluminium and magnesium alloys are investigated. The peak temperatures attained during friction stir spot welding of Al 6111, Al 2024, and AZ91 are within 6% of their solidus temperatures. In dissimilar AZ91/Al 6111 spot welds the peak temperature corresponds with the α-Mg solid solution and Mg 17 Al 12 eutectic temperature of 437°C. An a-Mg plus Mg 17 Al 12 eutectic microstructure is produced in dissimilar friction stir spot welds when material displaced during pin penetration into the lower sheet material contacts the upper sheet material at the eutectic temperature.
Publication Year: 2005
Publication Date: 2005-12-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 121
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