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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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Eldrup, Morten Mostgaard
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2013Cavity nucleation and growth during helium implantation and neutron irradiation of Fe and steelcitations
- 2012Cavity nucleation and growth during helium implantation and neutron irradiation of Fe and steel
- 2012Free volume dilatation in polymers by ortho-positroniumcitations
- 2010Free standing bulk metallic glass microcomponents: Tooling considerationscitations
- 2010Final Report on Investigations of the influence of Helium concentration and implantation rate on Cavity Nucleation and Growth during neutron irradiation of Fe and EUROFER 97
- 2008Nanostructural evolution of Cr-rich precipitates in a Cu-Cr-Zr alloy during heat treatment studied by 3 dimensional atom probecitations
- 2007Bulk forming of industrial micro components in conventional metals and bulk metallic glassescitations
- 2005Free volume sizes in intercalated polyamide 6/clay nanocompositescitations
- 2005Final report on neutron irradiation at low temperature to investigate plastic instability and at high temperature to study caviation
- 2004Neutron irradiated copper: Is the main positron lifetime component due to stacking fault tetrahedra?
- 2004Review. Evolution of stacking fault tetrahedra and its role in defect accumulation under cascade damage conditionscitations
- 2003Evolution of stacking fault tetrahedra and its role in defect accumulation under cascade damage conditions
- 2002Investigations of void formation in neutron irradiated iron and F82H steel
- 2001Effect of bonding and bakeout thermal cycles on the properties of copper alloys irradiated at 350 degrees Ccitations
- 2000Bulk amorphous alloys: Preparation and properties of (Mg 0 . 9 8 Al 0 . 0 2 ) x (Cu 0 . 7 5 Y 0 . 2 5 ) 1 0 0 - xcitations
- 2000Comparison of properties and microstructures of Tréfimétaux CuNiBe and Hycon 3HP T M before and after neutron irradiation
- 2000Preparation and Properties of Mg-Cu-Y-Al bulk Amorphous Alloys
- 2000Bulk amorphous alloys: Preparation and properties of (Mg0.98Al0.02)x(Cu0.75Y0.25)100-xcitations
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article
Preparation and Properties of Mg-Cu-Y-Al bulk Amorphous Alloys
Abstract
Bulk amorphous (Mg(1-gamma)Al(gamma))(60)CU(30)Y(10) alloys were prepared using a relatively simple technique of rapid cooling of the melt in a copper wedge mould. The temperature vs, time was recorded during the cooling and solidification process of the melt and compared with a spacial and temporal numerical simulation of that process. It is concluded that good thermal contact is maintained between the amorphous part of the solidified sample and the mould, while a rather poor contact develops between the crystalline part of the sample and the mould, probably due to the appearance of a narrow gap at the crystal-mould interface during crystallisation. The maximum amorphous layer thickness decreases from similar to3 mm to zero when the Al content increases in the range from 0 to about y = 10%. The evolution of the microstructure of the initially amorphous phase was examined by x-ray diffraction (XRD) and differential scanning calorimetry (DSC) for different alloy compositions and annealing temperatures. On annealing into the supercooled liquid state (441 K), specimens with no Al content remain basically amorphous while nanoparticles are formed and remain stable also at higher temperatures in specimens containing a few percent Al. The alloy with no Al crystallises apparently without the formation of nanoparticles. The critical cooling rate for the formation of an amorphous Mg(60)CU(30)Y(10) specimen was determined experimentally by a combination of DSC data and temperature vs, time measurements to be 60-150 K/s, in agreement with estimates from the literature. The Vickers hardness (Hv) of the amorphous material for y = 2% is higher (similar to 360 kg/mm(2)) than for y = 0 (similar to 290 kg/mm(2)). On crystallisation the hardness of the latter material increases to the 400 kg/mm(2) level while the hardness of the former does not change.