An investigation on microstructure and mechanical properties of post-weld heat-treated friction stir welds in aluminum alloy 2024-W
Date
2013
Authors
Durgun, İsmail
Journal Title
Journal ISSN
Volume Title
Publisher
Sage Publication
Abstract
The present work describes the results obtained from microstructural and mechanical evaluation of post-weld heat treated friction stir welds of 2024 aluminum alloys in the W temper state. Post-weld heat treatments have been carried out at 510 degrees C for 2.5 h followed by ageing at room temperature for 6 months, at 100 degrees C and 190 degrees C for 10 h, and by cooling in static air (O-temper). The solution treatment caused abnormal coarsening of the grains in the stir zone, which resulted in a drop in microhardness. The strength of the as-welded joint was significantly incrased by post weld heat treatments. The maximum hardness and strength values were obtained in T6 (190 degrees C, 10 h) treated joint. However, the T6 (190 degrees C, 10 h) treated joint had the lowest ductility. On the other hand, the tensile properties of the post-weld heat treated joints were far lower than those of the unwelded base materials in the same temper states. In addition, the post-weld heat treatments did not significantly change the fracture locations of the friction stir welds.
Description
Keywords
Engineering, Post-weld heat treatment, Friction stir welding, 2024 aluminum alloy, Mechanical properties, Tensile properties, Fracture locations, Mg alloys, Joints, Behavior, Fatigue, Parameters, AA2024, Heat treatment, Mechanical properties, Welds, 2024 aluminum alloy, Fracture location, Mechanical evaluation, Microstructure and mechanical properties, Post weld heat treatment, Post-weld heat treated, Post-weld heat treated joints, Solution treatments, Friction stir welding
Citation
Aydın, H. vd. (2013). “An investigation on microstructure and mechanical properties of post-weld heat-treated friction stir welds in aluminum alloy 2024-W”. Proceedings of the Institution of Mechanical Engineers, Part C- Journal of Mechanical Engineering Science, 227(C4), 649-662.