Behavior of compressive residual stresses in high strength steel welds induced by high frequency mechanical impact treatment
2014 (English)In: Proceedings of the ASME Pressure Vessels and Piping Conference 2013: presented at ASME 2013 pressure vessels and piping conference, July 14-18, 2013, Paris, France, ASME Press, 2014Conference paper (Refereed)
Residual stress state plays an important role in the fatigue life of welded structures. They can be beneficial or detrimental, depending on the nature of residual stresses. High frequency mechanical impact (HFMI) treatment is a post-weld fatigue improvement technique for welded joints. In this research work the behavior of compressive residual stresses induced in welded joints in high strength steels (HSS) by HFMI treatment has been investigated. Longitudinal non load carrying attachments in HSS are tested with constant amplitude (CA) and variable amplitude (VA) loading. Stress concentration factors have been calculated using Finite Element Analysis (FEA). Residual stresses have been measured at different cycles during fatigue testing using X-ray diffractiontechnique. It is observed that the induced residual stresses are quite stable with some relaxation in CA and VA loading. The overloads in VA loading seem to be more detrimental. Relaxation of residual stresses is more obvious in VA tests.
Place, publisher, year, edition, pages
ASME Press, 2014.
, American Society of Mechanical Engineers. Pressure Vessels and Piping Division. Publication PVP, ISSN 0277-027X ; Volume 5, 2013
Residual stresses, High strength steel, Welded joints, Impact
Other Mechanical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-136702DOI: 10.1115/PVP2013-97042ISI: 000362863900038ScopusID: 2-s2.0-84894677924ISBN: 978-079185569-0OAI: oai:DiVA.org:kth-136702DiVA: diva2:676712
ASME 2013 Pressure Vessels and Piping Conference, PVP 2013; Paris; France; 14 July 2013 through 18 July 2013
QC 201312192013-12-062013-12-062015-11-18Bibliographically approved