PSI - Issue 38

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 38 (2022) 411–417

FATIGUE DESIGN 2021, 9th Edition of the International Conference on Fatigue Design Fatigue and Ultimate Strength Assessment of Post Weld Treated

Strenx® 1100 Plus Butt Welds Tobias Jonsson a , Torbjörn Narström b , Zuheir Barsoum a, * a KTH Royal Institute of Technology, Department of Engineering Mechanics Teknikringen 8, 100 44 Stockholm, Sweden b SSAB AB 613 80 Oxelösund, Sweden a r b a,

© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers Abstract The demand of stronger and lighter structures is rapidly growing. Today's applications vary over a large range of industries where the requirements are different for different products which requires application driven research of the 3 rd generation Advance High-Strength Steels (AHSS). These are high-strength steels that are tailor-made to get desired mechanical properties. One AHSS manufactured by SSAB is their Strenx® 1100Plus steel that is specially designed to get excellent welding properties. In the current study the fatigue life improvement was investigated when using post weld treatments, TIG dressing and HFMI (High Frequency Mechanical Impact), for butt welded joints in Strenx® 1100Plus. Fatigue testing and assessment was carried out, using nominal stress and effective notch stress approaches, and the results were compared with fatigue strength recommendations for similar joints and steel grades given by the International institute of Welding (IIW). It is concluded that one additional FAT class increase could be observed in comparison to what is recommended by IIW for both types of post weld treatment methods. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers Keywords: High Strength Steels, HFMI, TIG Dressing, Welded Joints, Fatigue h rd This is an open access ar

* Corresponding author. Tel.: +46 70 230 43 42. E-mail address: zuheir@kth.se

2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers

2452-3216 © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers 10.1016/j.prostr.2022.03.042