Materials Research | |
Influence of welding parameters and post-weld aging on tensile properties and fracture location of AA2139-T351 friction-stir-welded joints | |
Umberto Prisco1  Antonino Squillace1  Antonello Astarita1  Carla Velotti1  | |
[1] ,University of Napoli Federico II Department of Materials and Production Engineering Napoli,Italy | |
关键词: welding parameters; AA2139-T351; friction stir welding; post-weld ageing; tensile properties; fracture location; | |
DOI : 10.1590/S1516-14392013005000099 | |
来源: SciELO | |
【 摘 要 】
Tensile properties and fracture location of AA2139-T351 friction stir welded joints are studied in the as-welded and post-weld aged condition. The experimental results show that when the joints are free of welding defects, they fail on the advancing side of the HAZ exhibiting a large amount of plastic deformation. When the revolutionary pitch exceeds a threshold value, some micro-defects are formed in the weld nugget due to insufficient heat input. In this case, the joints fail near the weld center, and the fracture occurs in a mixed mode, both ductile and brittle. However, being less ductile, post-weld aged joints are less defect-tolerant and, then, they fracture closer to the weld center, showing a reduced elongation at fracture and an UTS within the order of magnitude of the as-welded joints.
【 授权许可】
CC BY
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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RO202005130152987ZK.pdf | 3454KB | download |