Microstructure and fatigue properties of friction stir welded high-strength steel plates

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Microstructure and fatigue properties of friction stir welded high-strength steel plates. / Sorger, Gonçalo; Lehtimäki, Eero; Hurme, Susanna; Remes, Heikki; Vilaça, Pedro; Molter, Lars.

julkaisussa: Science and Technology of Welding and Joining, Vuosikerta 23, Nro 5, 2018, s. 380-386.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Bibtex - Lataa

@article{5be34aab48c14b088fd2da1d58f250bd,
title = "Microstructure and fatigue properties of friction stir welded high-strength steel plates",
abstract = "The weldability of high-strength steels (HSSs) is limited by their loss of strength, toughness and fatigue properties. In demanding applications, the fatigue properties of welds are among the strictest requirements. This paper presents a weldability analysis focusing on the microstructure and fatigue properties of 6 mm thick S690 and S355 HSS plates joined by friction stir welding. Their fatigue properties are compared to design recommendations and to fatigue properties obtained with other welding techniques. Results show that the high-quality friction stir welded steel joints outperform high-quality arc welds and FAT80 design recommendations. The fatigue strength of the friction stir welded joints is increased with material yield strength. The mechanisms governing crack initiation at different maximum stress levels are discussed.",
keywords = "fatigue, Friction stir welding, high-strength steel, microstructure, S355, S690",
author = "Gon{\cc}alo Sorger and Eero Lehtim{\"a}ki and Susanna Hurme and Heikki Remes and Pedro Vila{\cc}a and Lars Molter",
year = "2018",
doi = "10.1080/13621718.2017.1399574",
language = "English",
volume = "23",
pages = "380--386",
journal = "Science and Technology of Welding and Joining",
issn = "1362-1718",
publisher = "Maney Publishing",
number = "5",

}

RIS - Lataa

TY - JOUR

T1 - Microstructure and fatigue properties of friction stir welded high-strength steel plates

AU - Sorger, Gonçalo

AU - Lehtimäki, Eero

AU - Hurme, Susanna

AU - Remes, Heikki

AU - Vilaça, Pedro

AU - Molter, Lars

PY - 2018

Y1 - 2018

N2 - The weldability of high-strength steels (HSSs) is limited by their loss of strength, toughness and fatigue properties. In demanding applications, the fatigue properties of welds are among the strictest requirements. This paper presents a weldability analysis focusing on the microstructure and fatigue properties of 6 mm thick S690 and S355 HSS plates joined by friction stir welding. Their fatigue properties are compared to design recommendations and to fatigue properties obtained with other welding techniques. Results show that the high-quality friction stir welded steel joints outperform high-quality arc welds and FAT80 design recommendations. The fatigue strength of the friction stir welded joints is increased with material yield strength. The mechanisms governing crack initiation at different maximum stress levels are discussed.

AB - The weldability of high-strength steels (HSSs) is limited by their loss of strength, toughness and fatigue properties. In demanding applications, the fatigue properties of welds are among the strictest requirements. This paper presents a weldability analysis focusing on the microstructure and fatigue properties of 6 mm thick S690 and S355 HSS plates joined by friction stir welding. Their fatigue properties are compared to design recommendations and to fatigue properties obtained with other welding techniques. Results show that the high-quality friction stir welded steel joints outperform high-quality arc welds and FAT80 design recommendations. The fatigue strength of the friction stir welded joints is increased with material yield strength. The mechanisms governing crack initiation at different maximum stress levels are discussed.

KW - fatigue

KW - Friction stir welding

KW - high-strength steel

KW - microstructure

KW - S355

KW - S690

UR - http://www.scopus.com/inward/record.url?scp=85034668204&partnerID=8YFLogxK

U2 - 10.1080/13621718.2017.1399574

DO - 10.1080/13621718.2017.1399574

M3 - Article

VL - 23

SP - 380

EP - 386

JO - Science and Technology of Welding and Joining

JF - Science and Technology of Welding and Joining

SN - 1362-1718

IS - 5

ER -

ID: 16470630