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Kalle Lipiäinen, Antti Ahola, Antti Kaijalainen, Timo Björk, Fatigue performance of notched and hot-dip galvanized laser and mechanically cut S960 steel components considering local defects with the theory of critical distances, International Journal of Fatigue, Volume 164, 2022, 107127, ISSN 0142-1123, https://doi.org/10.1016/j.ijfatigue.2022.107127

Fatigue performance of notched and hot-dip galvanized laser and mechanically cut S960 steel components considering local defects with the theory of critical distances

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Author: Lipiäinen, Kalle1; Ahola, Antti1; Kaijalainen, Antti2;
Organizations: 1Laboratory of Steel Structures, Lappeenranta-Lahti University of Technology LUT, P.O. Box 20, FI-53851 Lappeenranta, Finland
2Materials and Mechanical Engineering, Centre for Advanced Steels Research, University of Oulu, P.O. Box 4200, 90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 10.2 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2022082456048
Language: English
Published: Elsevier, 2022
Publish Date: 2022-08-24
Description:

Abstract

Experimental fatigue tests were performed for a S960 steel grade, including hot-dip galvanized (HDG) round base material specimens, and laser cut, and machined notched component-sized specimens made of t = 6 mm S960 ultra-high-strength steel (UHSS) plates. Cracking after the HDG was found to have a major influence on fatigue strength and thus reducing the effect of surface quality on the fatigue performance. Design guidelines for notched HDG components are proposed, and HDG with UHSSs was found suitable for structures with geometrical notches. Multiparametric TCD-based 4R method application was introduced, and it was found to be applicable for the fatigue strength assessment of structural details with initial cracks.

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Series: International journal of fatigue
ISSN: 0142-1123
ISSN-E: 1879-3452
ISSN-L: 0142-1123
Volume: 164
Article number: 107127
DOI: 10.1016/j.ijfatigue.2022.107127
OADOI: https://oadoi.org/10.1016/j.ijfatigue.2022.107127
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Subjects:
Fatigue strength
Hot-dip galvanizing
Laser cut edge
Ultra-high-strength steel
Article
Funding: The authors wish to thank Business Finland for funding through the Intelligent Steel Applications project (Grant ID: 7386/31/2018) & Fossil Free Steel Applications (Grant ID: 5498/31/2021) and SSAB Europe & Aurajoki for providing materials and galvanizing the specimens for experimental tests.
Copyright information: © 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
  https://creativecommons.org/licenses/by/4.0/