693.932 PEOPLE
| 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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Tiedje, Ns
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (60/60 displayed)
- 2024Integration of spray-formed AISI H13 overspray powder in additive manufacturing to enable a circular ecosystem
- 2024Microstructural Evolution During Welding of High Si Solution-Strengthened Ferritic Ductile Cast Iron Using Different Filler Metalscitations
- 2023Numerical Modelling for the Effect of Metalmould Air Gaps on Shell Thickness in Horizontal Continuous Casting of Cast Ironcitations
- 2022Laboratory-scale gas atomizer for the manufacturing of metallic powderscitations
- 2022Laying the foundational building blocks for digitalization of horizontal continuous casting
- 2021In situ synchrotron investigation of degenerate graphite nodule evolution in ductile cast ironcitations
- 2021On the role of the powder stream on the heat and fluid flow conditions during Directed Energy Deposition of maraging steel - Multiphysics modelling and experimental validationcitations
- 2021Unraveling compacted graphite evolution during solidification of cast iron using in-situ synchrotron X-ray tomographycitations
- 2021Recent trends in X‐ray based characterization of nodular cast ironcitations
- 2021Advanced Process Models for analysis and process control of continuous casting of cast iron
- 2020Micromechanical impact of solidification regions in ductile iron revealed via a 3D strain partitioning analysis methodcitations
- 2018A graphite nodule growth model validated by in situ synchrotron x-ray tomographycitations
- 2018Use of high intensity X-ray analysis as tool to create new, fundamental models for phase transformations and residual stress in ductile cast iron
- 2018Revisiting models for spheroidal graphite growthcitations
- 2018Analysis of local conditions on graphite growth and shape during solidification of ductile cast ironcitations
- 2018Residual Stresses around Individual Graphite Nodules in Ductile Iron: Impact on the Tensile Mechanical Propertiescitations
- 2018Synchrotron quantification of graphite nodule evolution during the solidification of cast ironcitations
- 2018Uncovering the local inelastic interactions during manufacture of ductile cast iron: How the substructure of the graphite particles can induce residual stress concentrations in the matrixcitations
- 2017A Contribution to the Understanding of the Combined Effect of Nitrogen and Boron in Grey Cast Ironcitations
- 2017Kinetics modeling of delta-ferrite formation and retainment during casting of supermartensitic stainless steelcitations
- 2016A micro-mechanical analysis of thermo-elastic properties and local residual stresses in ductile iron based on a new anisotropic model for the graphite nodulescitations
- 2016Moisture diffusion coefficients determination of furan bonded sands and water based foundry coatings
- 2016Bonding mechanisms in spot welded three layer combinations
- 2015Modelling the solidification of ductile cast iron parts with varying wall thicknessescitations
- 2015Modeling of damage in ductile cast iron – The effect of including plasticity in the graphite nodulesscitations
- 2015Thermal distortion of disc-shaped ductile iron castings in vertically parted mouldscitations
- 2014A TEM Study on the Ti-Alloyed Grey Iron
- 2014Feeding Against Gravity with Spot Feeders in High Silicon Ductile Iron
- 2014Effect of Feeder Configuration on the Microstructure of Ductile Cast Ironcitations
- 2013Modelling Eutectic Growth in Unmodified and Modified Near-Eutectic Al-Si Alloycitations
- 2013Investigation on the Effect of Sulfur and Titanium on the Microstructure of Lamellar Graphite Ironcitations
- 2013Quantification of Feeding Effects of Spot Feeding Ductile Iron Castings made in Vertically Parted Moulds
- 2013A new multi-zone model for porosity distribution in Al–Si alloy castingscitations
- 2012Effect of titanium on the near eutectic grey iron
- 2012A TEM Study on the Microstructure of Fine Flaky Graphite
- 2012Analysis of nucleation modelling in ductile cast ironcitations
- 2012Design and production of a novel sand materials strength testing machine for foundry applications
- 2012A solidification model for unmodified, Na-modified and Sr-modified Al-Si alloyscitations
- 2012Feeding and Distribution of Porosity in Cast Al-Si Alloys as Function of Alloy Composition and Modificationcitations
- 2011New sol–gel refractory coatings on chemically-bonded sand cores for foundry applications to improve casting surface qualitycitations
- 2010Influence of New Sol-gel Refractory Coating on the Casting Properties of Cold Box and Furan Cores for Grey Cast iron.
- 2010Solidification, processing and properties of ductile cast ironcitations
- 20093-D Analysis of Graphite Nodules in Ductile Cast Iron Using FIB-SEM
- 2009Solidification paths in modified Inconel 625 weld overlay materialcitations
- 2009Influence of rare earths on shrinkage porosity in thin walled ductile cast ironcitations
- 2008Temperature measurement during solidification of thin wall ductile cast iron. Part 1: Theory and experimentcitations
- 2008Graphite nodule count and size distribution in thin-walled ductile cast ironcitations
- 2008Undercooling, nodule count and carbides in thin walled ductile cast iron
- 2008Experimental analysis of flow of ductile cast iron in stream lined gating systems
- 2007Undercooling and nodule count in thin walled ductile iron castingscitations
- 2007Experimental validation of error in temperature measurements in thin walled ductile iron castingscitations
- 2006Numerical modelling of solidification of thin walled hypereutectic ductile cast iron
- 2006Segregation effects and phase developments during solidification of alloy 625
- 2006Solidification of Hypereutectic Thin Wall Ductile Cast Iron
- 2006Numerical modelling of thin-walled hypereutectic ductile cast iron partscitations
- 2005Investigation of solidification of thin walled ductile cast iron using temperature measurement
- 2005Nucleation and solidification of thin walled ductile iron - Experiments and numerical simulationcitations
- 2004Fundamental Metallurgy of Solidification
- 2004Segregation behaviour and phase developments during solidification of Inconel 625; effect of iron and carbon
- 2003Microstructure of Magnesium alloy AZ91-HP cast in permanent and non-permanent moulds
Places of action
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document
A solidification model for unmodified, Na-modified and Sr-modified Al-Si alloys
Abstract
An addition of small amounts of Na and Sr is commonly used in the industry to modify the eutectic in Al-Si alloys. Both Na and Sr suppress nucleation of the eutectic forcing nucleation and growth to take place at higher undercooling than in the unmodified material. Thus the scale of the eutectic and the shape of the Si crystals are modified to a fine fibrous form so that the ductility of the material is increased. In the present work a one-dimensional numerical model is proposed that describes nucleation and growth of both primary dendrites and eutectic grains as a function of cooling conditions and modification. The model assumes that dendrites nucleate easily when the liquidus temperature is reached and that they grow as heat is extracted by the mould. Nucleation of the eutectic grains depends on local undercooling and growth is governed by a balance between growth of the eutectic grains and the rate at which heat is extracted by the mould. Experimental data is used to determine constants in the nucleation function. It is shown how cooling conditions and mode of modification influence nucleation and growth conditions.