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Fatigue behaviour of AA5052-H36 laser-welded overlap joints: effect of stitch-weld orientation and gap bridging

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1016/j.ijfatigue.2022.107358
AuthorSearch for: 1; Search for: 1; Search for: ; Search for:
Affiliation
  1. National Research Council Canada. Automotive and Surface Transportation
FunderSearch for: PRIMA; Search for: Natural Sciences and Engineering Research Council of Canada
FormatText, Article
Subjectoverlap laser welding; aluminium alloy; weld design parameters; fatigue behaviour; in-situ monitoring
Abstract
This study investigates the fatigue behaviour of overlap laser-welded 1.6 mm thick AA5052-H36 sheets. The oscillation beam laser welding in continuous mode is adopted for preparing defect-free weld seams. Three different stitch-weld orientations (transversal, longitudinal, and diagonal with respect to the load direction, denoted in the present work A, B, and F, respectively) coupled with two different part-to-part gap values (in contact and out-of-range gaps, denoted G00 and G05, respectively) are considered. The vertical configuration showed the highest fatigue resistance and repeatability as well as the highest resistance to crack propagation and the most secure fracture pattern. Finally, the gap decreased the fatigue life in a range of 5–20% depending on the applied load and the stitch-weld orientation.
Publication date
PublisherElsevier
In
  • International Journal of Fatigue 167, no. PB, 107358 (February 2023).
LanguageEnglish
Peer reviewedYes
IdentifierS0142112322006089
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Record identifierdfeefdf2-55bc-4d3e-b16b-740fb8c60d60
Record created2023-09-14
Record modified2023-09-14
Date modified: