Abstract
The microstructure of the interface between Al alloy and Mg alloy joined by friction stir welding is characterized using electron microscopy . The intermetallic compound reaction layer has a thickness of about 1 μm and consists mainly of fine-grained Al 12 Mg 17 phase. Further nanosize-grained Al 3 Mg 2 inclusions in close proximity to the Al 12 Mg 17 layer appear in the Al alloy.
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