The influence of zigzag-curve defect on the fatigue properties of friction stir welds in 7075-T6 Al alloy

The influence of zigzag-curve defect on the fatigue properties of friction stir welds in 7075-T6 Al alloy

The microstructure and fatigue properties of friction stir welded joints of 7075-T6 Al alloy were discussed. It was shown that the zigzag-curve defect at the root of welds is the key factor to reduce the fatigue performance of single-sided friction stir welded joints of 7075-T6 high strength aluminu...

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Veröffentlicht in:Materials chemistry and physics 2007-08, Vol.104 (2), p.244-248
Hauptverfasser: Di, Shusheng, Yang, Xinqi, Fang, Dapeng, Luan, Guohong
Format: Artikel
Sprache:eng
Schlagworte:
Fatigue strength
Friction stir welding
Zigzag-curve defects
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Zusammenfassung:The microstructure and fatigue properties of friction stir welded joints of 7075-T6 Al alloy were discussed. It was shown that the zigzag-curve defect at the root of welds is the key factor to reduce the fatigue performance of single-sided friction stir welded joints of 7075-T6 high strength aluminum alloy. On the other hand, the FSW joints of 7075-T6 Al alloy achieved higher fatigue strength compared to the traditional fusion design curves IIW FAT40 and Draft Eurocode 9 design category 55-6 for structural aluminum alloy components.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2007.01.023