Fatigue performance of friction stir welded marine grade steel

Abstract

Please cite this article as: Polezhayeva, H., Toumpis, A.I., Galloway, A.M., Molter, L., Ahmad, B., Fitzpatrick, M.E., Fatigue performance of friction stir welded marine grade steel, International Journal of Fatigue (2015), doi: http://dx.doi.org/10.1016/j.ijfatigue. 2015.08.003 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Fatigue performance of friction stir welded marine grade steel AbstractAn extensive study on the fatigue performance of friction stir welded DH36 steel was carried out. The main focus of this experimental testing programme was fatigue testing accompanied by tensile tests, geometry measurements, hardness and residual stress measurements, and fracture surface examination. The S-N curve for friction stir butt welded joints was generated and compared with the International Institute of Welding recommendations for conventional fusion butt welds. Friction stir welds of marine grade steel exceeded the relevant rules for fusion welding. This newly developed S-N curve is being proposed for use in the relevant fatigue assessment guidelines for friction stir welding of low alloy steel. Fracture surfaces were examined to investigate the fatigue failure mechanism, which was found to be affected by the processing features generated by the friction stir welding tool.

Friction Stir Processing Influence on Microstructure, Mechanical, and Corrosion Behavior of Steels: A Review

“…The fatigue resistance of FSW butt joints was found to be much higher than other classes of welded butt joints. It was also recommended that slow FSW speed is best suited for improved fatigue performance due to the development of a highly refined, defect-free microstructure in the welded zone [ 47 ]. Fatigue strength of butt welded joints after FSP was investigated by Yamamoto and Ito [ 48 ] on two high-strength steels.…”

Report of Committee III.2: Fatigue and fracture

“…An extensive experimental study on the fatigue performance of friction stir welded 6-mm thick DH35 marine grade steel was presented in (Polezhayeva et al, 2015b). The study included fatigue and tensile tests, geometry and hardness measurements, microstructure and fracture surface examinations.…”

Numerical optimisation of laser assisted friction stir welding of structural steel

“…Investigation on the FSW prospects for high strength alloys such as steel is being conducted since last decade [4]. Various researches have demonstrated remarkable results for steel FSW [5][6][7][8][9].…”