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Robustness of the HFMI techniques and the effect of weld quality on the fatigue life improvement of welded joints
SWERIM, Kista, Sweden.
KTH, School of Engineering Sciences (SCI), Engineering Mechanics.ORCID iD: 0000-0003-4180-4710
SWERIM, Kista, Sweden.
2020 (English)In: Welding in the World, ISSN 0043-2288, E-ISSN 1878-6669, Vol. 64, no 11, p. 1947-1956Article in journal (Refereed) Published
Abstract [en]

Robustness of HFMI treatment in different weld qualities according to ISO 5817 was studied, and fatigue testing of the treated samples was carried out in order to investigate the effect of the weld quality prior treatment. The results show that HFMI-treated welds with weld quality level D shows fatigue life improvements that fall within the IIW recommendations for HFMI. No significant influence from the HFMI operator or HFMI equipment on the fatigue life was found. However, the scatter in fatigue testing results varied with HFMI operator and indicated that different HFMI operators could produce consistent treatment results. A considerable effect on fatigue life from HFMI tool radius was found, where the 2-mm tool radius showed considerably greater fatigue life compared with the 1.5-mm tool radius. According to IIW (Marquis and Barsoum 2016), for steel grade SY = 700 MPa, the fatigue strength recommendation is FAT 160 (m = 5) for transverse stiffener–welded joints with as-welded quality B according to ISO 5817 (ISO/TC 44/SC 10 2011), prior to treatment. It can be observed in the current study that fatigue-tested HFMI-treated welded joints, welded with weld quality D, are in good agreement with the IIW recommendations.

Place, publisher, year, edition, pages
Springer Science and Business Media Deutschland GmbH , 2020. Vol. 64, no 11, p. 1947-1956
Keywords [en]
Fatigue, HFMI, Improvement techniques, Weld quality, Welded joints, Fatigue testing, Welded steel structures, Welding, Welding codes, Welds, Fatigue life improvement, Fatigue strength, Steel grades, Transverse stiffener, Fatigue of materials
National Category
Manufacturing, Surface and Joining Technology
Identifiers
URN: urn:nbn:se:kth:diva-287977DOI: 10.1007/s40194-020-00974-4ISI: 000557114800001Scopus ID: 2-s2.0-85089195313OAI: oai:DiVA.org:kth-287977DiVA, id: diva2:1513340
Note

QC 20201230

Available from: 2020-12-30 Created: 2020-12-30 Last updated: 2022-06-25Bibliographically approved

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Barsoum, Zuheir

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