Abstract
One of the most significant problems associated with the implementation of high strength steels for offshore applications lies with the guarantee of welded joint reliability. An aspect of particular interest is the through thickness variation of heat affected zone toughness of thick section (above 60 mm) high strength steels. An experimental study combining microstructural investigations with a new adjusted sub-sized CTOD test was conducted in order to assess the fracture toughness in the heat affected zone (HAZ) of welds on high strength steels. The emphasis was placed on the coarse grain HAZ. The effects of variations in alloying and inclusion content on the microstructure and toughness properties have been studied. Results show that fracture toughness decreases in the mid-section of thick plates, which could be a result of non-uniform microstructure with local centerline segregation bands, larger grain sizes and inclusions, which act as crack initiation sites.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
E. Keehan, Effect of Microstructure on Mechanical Properties of High Strength Steel Weld Metals, PhD thesis, Göteborg, Sweden, 2004.
BSI, BS7448 Part 1–1991: Fracture mechanics toughness tests. Method for determination of KIc, critical CTOD and critical J values of metallic materials, 2002.
C. L. Walters, L.O. Voormeeren, M. Janssen, K. Wallin, Validation of the Acceptability of 10X20 Mm Specimens for Fracture Toughness Determination of High-Strength Steels, ASME, 2013.
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 2015 TMS (The Minerals, Metals & Materials Society)
About this paper
Cite this paper
Popovich, V.A., Richardson, I.M. (2015). Fracture Toughness of Welded Thick Section High Strength Steels and Influencing Factors. In: TMS 2015 144th Annual Meeting & Exhibition. Springer, Cham. https://doi.org/10.1007/978-3-319-48127-2_125
Download citation
DOI: https://doi.org/10.1007/978-3-319-48127-2_125
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48608-6
Online ISBN: 978-3-319-48127-2
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)