Fatigue life assessment of improved joints welded with alternative welding techniques
2014 (English)In: Engineering Failure Analysis, ISSN 1350-6307, E-ISSN 1873-1961, Vol. 42, no July, 10-21 p.Article in journal (Refereed) Published
In this study, the fatigue life improvement by adopting the toe weaving technique on nonload carrying cruciform welded joints has been investigated. Fatigue testing was conducted on two batches of specimens welded using double-pass manual welding. One batch had a straight second pass and the other was weaved. The influence of different weaving shape parameters was analyzed by performing crack growth analyses. The fatigue testing shows a slightly improved fatigue life for the two different batches compared to as-welded joints; the improvement is similar for both batches. The crack growth analysis concludes that the batch with the straight second pass should provide slightly higher fatigue life compared to the toe weaved batch. Measurements show a presence of undercuts in the vicinity of the crack initiation site. Nonetheless, an increased fatigue life is obtained, due to the low flank angle created during welding of the second pass, which reduces the stress concentration in the weld toe, prolonging the fatigue life.
Place, publisher, year, edition, pages
2014. Vol. 42, no July, 10-21 p.
Weld improvement, Fracture mechanics, Crack growth analysis, Fatigue testing
Manufacturing, Surface and Joining Technology
Research subject Production Technology
IdentifiersURN: urn:nbn:se:hv:diva-9335DOI: 10.1016/j.engfailanal.2014.03.012OAI: oai:DiVA.org:hv-9335DiVA: diva2:925610