| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Vuherer, Tomaž
University of Maribor
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2023Evaluation of the impact and fracture toughness of a nanostructured bainitic steel with low retained austenite content
- 2023Optimisation of precipitation hardening for 15-5 PH martensitic stainless steel produced by wire arc directed energy depositioncitations
- 2023ASSESSMENT OF FATIGUE BEHAVIOUR OF UHSS STEEL BUTT-WELDED JOINTS BY MEANS OF A FRACTURE MECHANICS METHODOLOGY
- 2022Effect of welding processes on the fatigue behaviour of ultra-high strength steel butt-welded jointscitations
- 2022Experimental Analysis of HSLA Steel Welded Joint Fracture Behaviourcitations
- 2020The Effect of Ti-6Al-4V Alloy Surface Structure on the Adhesion and Morphology of Unidirectional Freeze-Coated Gelatincitations
- 2019A new statistical pattern recognition method and a new sequence hybrid method of intelligent systems
- 2019CMT additive manufacturing of a high strength steel alloy for application in crane constructioncitations
- 2017The influence of electric arc activation on the speed of heating and the structure of metal in weldscitations
- 2017Fatigue crack initiation from microstructurally small Vickers indentations ; Nastanak zamorne pukotine iz mikrostrukturno malih vickersovih otisaka
- 2015The behaviour of coarse-grain HAZ steel with small defects during cycling loading ; Vedenje jekla grobozrnatega TVP z napakami pri ciklični obremenitvi
- 2015Behaviour of short cracks emanating from tiny drilled holes ; Vedenje kratkih razpok, ki nastanejo iz majhnih izvrtin
- 2015Automated diagnostics of damage to an aluminum alloy under the conditions of high-cycle fatigue ; Avtomatizirana diagnostika poškodbe aluminijeve zlitine pri visoko-cikličnem utrujanju
- 2015Methodology of determination the influence of corrosion pit on decrease of hydro turbine shaft fatigue life
- 2012Some factors affecting fatigue resistance of welds ; Neki faktori koji utiču na otpornost zavara prema zamoru
- 2012Microcrack initiation and growth in heat-risistant 15Kh2MFA steel under cyclic loading
Places of action
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article
Effect of welding processes on the fatigue behaviour of ultra-high strength steel butt-welded joints
Abstract
<p>In the last decades, advances in steel manufacturing made possible the use of high-strength steel (HSS) and ultra-high strength steel (UHSS) for several applications, such as bridges, cranes, offshore structures, oil pipelines and automotive parts. Capacity of withstanding loads with reduced cross-section and minimum weight could be efficiently increased. Since most structures need to be joined, welding procedures are a major issue in mechanical design of HSS elements. Particularly in construction codes and design documents, it is normally assumed that fatigue resistance of as-welded joints is independent of strength level. Nevertheless, fatigue loaded as-welded components with high quality welds or post-weld treated joints could experience benefits from the use of HSS as the base material (BM). The purpose of the present work is to analyse fatigue behaviour of ultra-high strength steel butt-welded joints, by means of experimental testing and a fracture mechanics approach. Sheets of steel S960MC and S960QL were joined with different welding techniques: Gas Metal Arc Welding (GMAW), Laser Hybrid Welding (LHW) and Electron Beam Welding (EBW). Fatigue tests were performed with stress ratio R=0.1, under four points bending loading. All specimens exhibited fatigue crack initiation and subsequent propagation from the weld toe area, near the heat affected zone (HAZ). Different S[sbnd]N curves were obtained for the different welding processes. The Resistance Curve methodology was employed to assess the effect of microstructure, defect size, hardness, and joint geometry resulting from each technique. This fracture mechanics approach allowed to estimate the relative influence of the different geometrical and mechanical parameters of the weld and showed that joint geometry could not explain by itself the differences in fatigue strength. It was observed that microstructure and the size of defects played an important role in early crack growth, and they can reduce the benign effect of a high-strength base material.</p>