Process-structure-property relationship for nugget and HAZ regions of AA2524-T351 FSW joints
- Yan J.H. ,
- Sutton M.A. and
- Reynolds A.P.
- Yan J.H. ,
- Sutton M.A. and
- Reynolds A.P.
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The effects of rotation speed, welding speed and Z-axis force on process response variables (power, specific energy, torque, X-axis force) and properties (nugget hardness, strength and ductility, nugget grain size and HAZ hardness) of AA2524-T351 friction stir welds were studied. Following welding, welds were naturally aged for 1 month and then sectioned normal to the welding direction. The fracture surfaces of tensile specimens were observed by SEM. Rotation speed had the dominant effect on nugget properties. Optimum nugget tensile properties were obtained by increasing tool rotational speed to attain a peak temperature just below the incipient local melting temperature. Welding torque was strongly related to peak weld temperature and was inversely related to grain size.
5th International Symposium, 14-16 Sep 2004, Session 7B: Metallurgy/Microstructure, Paper 03
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