| 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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Grün, Florian
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (41/41 displayed)
- 2024Influence of corrosion fatigue on the stress gradient effect of the aluminium alloy EN AW-6082 T6citations
- 2023Impacts of nano-clay particles and heat-treating on out-of-phase thermo-mechanical fatigue characteristics in piston aluminum-silicon alloyscitations
- 2023Low-Cycle Fatigue Behavior of Wire and Arc Additively Manufactured Ti-6Al-4V Materialcitations
- 2023The Interaction of Two Amorphous Carbon Coatings (ta-C and a-C) on Polymer Substrates and the Consequences of the Tribological Contact Situation
- 2023Influence of corrosion fatigue on the fatigue strength of an AlSi10MgMn high-pressure die-casting alloy with regard to the surface conditioncitations
- 2023Experimental visualization of the wear and scuffing evolution of a flake graphite cast iron cylinder linercitations
- 2022Very high cycle fatigue assessment at elevated temperature of 100 µm thin structures made of high-strength steel X5CrNiCuNb16-4citations
- 2022Optimization of disc geometry and hardness distribution for better transferability of fatigue life prediction from disc to FZG testscitations
- 2022Fatigue Assessment of Wire and Arc Additively Manufactured Ti-6Al-4Vcitations
- 2022Tribological characterization of coatings for their suitability as protective coatings for rollers using two-disc model investigations
- 2021Novel S-N curve for different hardened layers in point and line contactcitations
- 2021Phenomenological wear model of case-hardened 20MnCr5 under cyclic line rolling contactcitations
- 2021Effect of Surface Layer on the Fatigue Strength of Selectively Laser Melted 17-4 PH Steelcitations
- 2021Model Calibration and Data Set Determination Considering the Local Micro-Structure for Short Fiber Reinforced Polymers
- 2021Improving the Tribological Properties of Technical Polymers with Metal Sulphide Compoundscitations
- 2020Modelling the effect of ageing on the yield strength of an aluminium alloy under cyclic loading at different ageing temperatures and test temperaturescitations
- 2020Precise Correlation of Contact Area and Forces in the Unstable Friction between a Rough Fluoroelastomer Surface and Borosilicate Glasscitations
- 2020Evaluation of tensile and low-cycle fatigue properties at elevated temperatures in piston aluminum-silicon alloys with and without nano-clay-particles and heat treatmentcitations
- 2020Assessment of Shaft Surface Structures on the Tribological Behavior of Journal Bearings by Physical and Virtual Simulationcitations
- 2020Material behaviour of a dual hardening steel under thermomechanical loadingcitations
- 2020Influence of specimen diameter size on the deformation behaviour and short-term strength range of an aluminum alloy
- 2019Effect of Post Treatment on the Microstructure, Surface Roughness and Residual Stress Regarding the Fatigue Strength of Selectively Laser Melted AlSi10Mg Structurescitations
- 2019Fretting behavior of thermoplastic polyurethanescitations
- 2019Numerical Fatigue Analysis of Induction-Hardened and Mechanically Post-Treated Steel Componentscitations
- 2019Datensatzermittlung zur lebensdauervorhersage kurzfaserverstärkter kunststoffecitations
- 2019Lifetime assessment of anisotropic materials by the example short fibre reinforced plasticcitations
- 2018Application of a area -Approach for Fatigue Assessment of Cast Aluminum Alloys at Elevated Temperaturecitations
- 2018Application of modified Kitagawa-Takahashi diagram for fatigue strength assessment of cast Al-Si-Cu alloyscitations
- 2018Effect of Tungsten Carbides on Abrasive Wear of Hardfacing Coatingscitations
- 2018Validation of a new high frequency testing technique in the VHCF regime – Fatigue properties of a 42CrMoS4 and X5CrNiCuNb16-4 steelcitations
- 2018In-situ crack propagation measurement of high-strength steels including overload effectscitations
- 2017Simulation of lamellar cast iron components under TMF-loadscitations
- 2017Influence of tribofilm formation in DLC-steel line contacts on friction
- 2016High- and low-cycle fatigue influence of silicon, copper, strontium and iron on hypo-eutectic Al–Si–Cu and Al–Si–Mg cast alloys used in cylinder heads
- 2016Multiaxial fatigue assessment of crankshafts by local stress and critical plane approachcitations
- 2016Thermo-mechanical fatigue influence of copper and silicon on hypo-eutectic Al–Si–Cu and Al–Si–Mg cast alloys used in cylinder headscitations
- 2016Fatigue strength assessment of AlSi7Cu0.5Mg T6W castings supported by computed tomography microporosity analysiscitations
- 2014Tribological performance of forged steel and cast iron crankshafts on model scale
- 2013Applicability of ring-on-disc and pin-on-plate test methods for Cu-steel and Al-steel systems for large area conformal contactscitations
- 2012Tribological functionality of aluminium sliding materials with hard phases under lubricated conditionscitations
- 2010Tribologische funktionsweise von ungefüllten und gefüllten TPU-dictungsmaterialen - Ein erfahrungsbericht
Places of action
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article
High- and low-cycle fatigue influence of silicon, copper, strontium and iron on hypo-eutectic Al–Si–Cu and Al–Si–Mg cast alloys used in cylinder heads
Abstract
In this publication, ambient condition fatigue investigations with different types of Al–Si–Cu and Al–Si–Mg cast alloys in rotating-bending high-cycle fatigue (HCF) and push–pull low-cycle fatigue (LCF) regimes have been performed with varying Si, Cu, Fe and Sr contents. The cast alloys investigated here are common used in cylinder heads for automotive application. Because the cylinder head is one of the most fatigued parts in combustion chamber engines, the microstructural knowledge of the damage process provides a tool of construction and its material selection. The investigations were also supported with an in-situ microstructural crack observation in high plasticity rotating-bending regimes. The specimens were directly processed out of serial produced T79 heat-treated cylinder heads to provide the equal microstructure for testing as under operational conditions.<br/><br/>The observations clearly identified the effects of the individual alloying elements both under low- and high-cycle fatigue. The crack propagation speed and the crack paths were majorly influenced by the eutectic silicon. Additional, the precipitation hardening due to copper affected significantly the fatigue endurance, too. In high plasticities the silicon’s influence got almost lost and only the matrix strength was crucial. Thus, increased fatigue strength in high loaded LCF regimes was observed for alloys with less copper content, thus higher ductility. By contrast, improved HCF and low loaded LCF endurance was only achieved when the matrix strength was increased by copper’s precipitation hardening. Crack branching and deflections strongly influenced the microstructural damage of the ductile AlSi7Mg(Sr) and hence, gained its fatigue strength. Iron phases could not identified as harmful inclusions, since the phases were similar in size of other hard phase elements like the other primary intermetallic phases like Al2CuAl2Cu and β-SiSi phases under notch stress aspects, by the well defined solidification process in the test section. Because the crack nucleation mainly occurred on Si particles, strontium as a refinement agent influenced the early crack onset and accordingly the fatigue in total. Thus, the AlSi6Cu4(Sr) had increased lifetimes compared to AlSi6Cu4 both in HCF and LCF. Further, the presented results provide a modification of the Manson–Coffin approach to describe the relationship between plastic strain and lifetime, valid for all proposed alloys with only one set of parameters. Thus, it was possible to perform the fatigue calculation with a reduced range of scatter.