Fatigue strength of butt joints welded from duplex steel

Welding tests were conducted using the flux-cored arc welding method on a plate made from duplex steel, grade UNS S31803, thickness of 9.5 mm with the increased 10 mm root gap. An analysis of fatigue strength was carried out, using the finite element method, on butt joints which underwent axial tens...

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Bibliographic Details
Published in:Welding International 2013-05, Vol.27 (5), p.323-330
Main Authors: Kurzydłowski, Krzysztof J., Matysiak, Hubert, Nowacki, Jerzy, Zając, Piotr
Format: Article
Language:English
Subjects:
Arc welding
Butt joints
Duplex stainless steels
Fatigue strength
Finite element analysis
Materials fatigue
Mathematical analysis
Roots
Steels
Welding
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Summary:Welding tests were conducted using the flux-cored arc welding method on a plate made from duplex steel, grade UNS S31803, thickness of 9.5 mm with the increased 10 mm root gap. An analysis of fatigue strength was carried out, using the finite element method, on butt joints which underwent axial tension. Experimental research of fatigue strength was conducted. The influence of welding, with various root gaps, on fatigue strength was determined. A fractographic analysis of selected samples, after fatigue strength examinations, was executed. It was proven that the increase of the root gap has an influence on a decrease in fatigue resistance; however, it fulfils the requirements prescribed by Det Norske Veritas rules.
ISSN:0950-7116
1754-2138
DOI:10.1080/09507116.2011.600038