Microstructure and Residual Stress Formation in an Aa6040 to Az31b Friction Stir Weld
نویسندگان
چکیده
The microstructure and residual stresses of an AA6040 Al to AZ31B Mg friction stir weld are studied using scanning electron microscopy and X-ray diffraction. The complex material flow promoted by the friction stir welding process results in a fine grained structure in the stir zone of both materials due to dynamic/recovery recrystallization. The interface between the materials is characterized by the presence of intermetallic phases which likely consist of Al12Mg17 and Al3Mg2. The residual stress distribution has the typical “M-like” profile common in friction stir welding processes.
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