Effect of kissing bond on fatigue behavior of friction stir welds on Al 5083 alloy

Fatigue properties of FS welds with a kissing bond (bonded welds) were studied by comparing the test results of bonded welds with those of sound welds. The fatigue life of bonded welds is 21∼43 times shorter than that of sound welds under the stress ratio R = 0.1, and the fatigue characteristic valu...

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Veröffentlicht in:Journal of materials science 2006-05, Vol.41 (10), p.2771-2777
Hauptverfasser: Zhou, Caizhi, Yang, Xinqi, Luan, Guohong
Format: Artikel
Sprache:eng
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Zusammenfassung:Fatigue properties of FS welds with a kissing bond (bonded welds) were studied by comparing the test results of bonded welds with those of sound welds. The fatigue life of bonded welds is 21∼43 times shorter than that of sound welds under the stress ratio R = 0.1, and the fatigue characteristic values of each welds have decreased from 100.24 MPa for sound welds to 65.57 MPa for bonded welds at 2 × 10⁶ cycles. At the macroscopic level there is no evidence of failure by shear. The fatigue fracture revealed cracks initiated from the root tip of kissing bond.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-006-6337-x