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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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Hassanin, Hany
Canterbury Christ Church University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2023Hot Air Contactless Single Point Incremental Formingcitations
- 2022Multipoint Forming Using Hole-Type Rubber Punchcitations
- 2021Laser powder bed fusion of Ti-6Al-2Sn-4Zr-6Mo alloy and properties prediction using deep learning approachescitations
- 2020Controlling the properties of additively manufactured cellular structures using machine learning approachescitations
- 20204D printing of origami structures for minimally invasive surgeries using functional scaffoldcitations
- 2018Additive Manufactured Sandwich Composite/ABS Parts for Unmanned Aerial Vehicle Applicationscitations
- 2018Surface finish improvement of additive manufactured metal partscitations
- 2018Microfabrication of Net Shape Zirconia/Alumina Nano-Composite Micro Partscitations
- 2018Tailoring selective laser melting process for titanium drug-delivering implants with releasing micro-channelscitations
- 2018Porosity control in 316L stainless steel using cold and hot isostatic pressingcitations
- 2017Net-Shape Manufacturing using Hybrid Selective Laser Melting/Hot Isostatic Pressingcitations
- 2017Evolution of grain boundary network topology in 316L austenitic stainless steel during powder hot isostatic pressingcitations
- 2017Development and Testing of an Additively Manufactured Monolithic Catalyst Bed for HTP Thruster Applicationscitations
- 2016Effect of casting practice on the reliability of Al cast alloyscitations
- 2016Adding functionality with additive manufacturing : fabrication of titanium-based antibiotic eluting implantscitations
- 2016Selective Laser Melting of TiNi Auxetic Structures
- 2016The development of TiNi-based negative Poisson's ratio structure using selective laser meltingcitations
- 2015Influence of processing conditions on strut structure and compressive properties of cellular lattice structures fabricated by selective laser meltingcitations
- 2015In-situ shelling via selective laser melting: modelling and microstructural characterisationcitations
Places of action
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article
Effect of casting practice on the reliability of Al cast alloys
Abstract
The properties of aluminium castings are strongly affected by their inclusion content, particularly entrained surface alumina films. These form due to the surface turbulence associated with mould filling, which causes the oxidised surface of a liquid metal to fold-over onto itself and be submerged into the bulk liquid with a thin layer of air entrapped within it. This is known as entrainment action. These flaws have been reported to increase the variability of the fracture strengths of Al alloy castings. This means that shape castings in light alloys can have inconsistent properties, which makes designing structures employing shape castings more difficult. Entrained surface layers can cause premature failure, but also have been associated with other defects, such as hydrogen porosity, shrinkage porosity, intermetallic compounds and hot tearing. Recent research has suggested that the air inside the defect would react with the surrounding melt leading to its consumption, which may enhance the mechanical properties of the casting. In this work, liquid aluminium was poured into three identical ceramic moulds which were immediately placed in a furnace to preserve the molten metal at 800 C, for different periods of time prior to freezing. The Weibull moduli of the plate castings were determined under tensile conditions, and their fracture surfaces examined using SEM. Investigation of the fracture surfaces of the specimens detected many alumina layers at different locations. Many of which were found inside pores, reflecting the role of entrained defects in the formation of porosity. The results also suggested that opposite phenomena may take place during the holding treatment. The consumption of air inside the entrained defects due to reaction with the surrounding molten metal may lead to improvements in mechanical properties, but this may be accompanied by hydrogen passing into the defects, which has a deleterious effect on properties.