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![Figure 1-1 Processing-Structure-Properties Relationship [12]](profile/Maxwell-Mageto/publication/279501189/figure/fig1/AS:584135307460608@1516280118246/1-Processing-Structure-Properties-Relationship-12_Q320.jpg)
![Figure 2-1 Age hardening heat treatment binary phase diagram [14]](profile/Maxwell-Mageto/publication/279501189/figure/fig2/AS:584135307448325@1516280118312/1-Age-hardening-heat-treatment-binary-phase-diagram-14_Q320.jpg)
Two different solution heat treatments (2hours at 570°C and 10minutes at 520°C) have been used to study precipitation in two 6xxx (Al-Mg-si) dispersoid-free-alloys with composition: 0.721 at % Si, 0.577 at % Mg (alloy A3) and 0.57 at %Si 0.72 at % Mg (alloy A12). The relation between their microstructure and macroscopical properties such as hardnes...
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Citations
... The microstructure, mechanical, and thermal properties of Al-Mg-Si alloys have been studied by a number of researchers [3,8,9]. However, there is scanty literature on ab initio studies of a combination of mechanical properties of these alloys, namely, bulk modulus, shear modulus, Young's modulus, Poisson's ratio, Pugh's ratio, Vickers hardness, and ductility. ...
... The Chen model has been known to accurately predict the hardness of super-hard materials but yields negative values for softer materials (hardness less than 5 GPa) [28]. The increase in hardness of the alloys in this study can be attributed to the extensive alloying [9]. A_82 is, therefore, recommended for use in plane skins since it has the highest hardness of all the alloys. ...
... The Vickers hardness falls first as the Si/Mg ratio is increased from zero, before rising to a maximum value, and then falling again slightly (Figure 7f). Precipitation is delayed in Mg-rich alloys (lower Si/Mg ratios), hence the low hardness values at low ratios [9]. The increase in hardness is due to more β precipitates, which are responsible for coarser structures in the 6xxx series and, hence, higher hardness. ...
Al–Mg–Si alloys are used in aircraft, train, and car manufacturing industries due to their advantages, which include non-corrosivity, low density, relatively low cost, high thermal and electrical conductivity, formability, and weldability. This study investigates the bulk mechanical properties of Al–Mg–Si alloys and the influence of the Si/Mg ratio on these properties. The Al cell was used as the starting structure, and then nine structures were modeled with varying percentages of aluminium, magnesium, and silicon. Elastic constant calculations were conducted using the stress–strain method as implemented in the quantum espresso code. This study found that the optimum properties obtained were a density of 2.762 g/cm3, a bulk modulus of 83.3 GPa, a shear modulus of 34.4 GPa, a Vickers hardness of 2.79 GPa, a Poisson’s ratio of 0.413, a Pugh’s ratio of 5.42, and a yield strength of 8.38 GPa. The optimum Si/Mg ratio was found to be 4.5 for most of the mechanical properties. The study successfully established that the Si/Mg ratio is a critical factor when dealing with the mechanical properties of the Al–Mg–Si alloys. The alloys with the optimum Si/Mg ratio can be used for industrial applications such as plane skins and mining equipment where these properties are required.
... Therefore, co-simulation is mostly limited to research studies and has not been uptaken by the facade industry (Singh Figure 2: Summary of reviewed multiphysics approaches in material and process engineering. Adapted from Rokvam (2018) and Mageto (2003). ...
... Nano-to micro-scale geometrical indicators such as molecular alignment of the Figure 2: Summary of reviewed multiphysics approaches in material and process engineering. Adapted from Rokvam (2018) and Mageto (2003). ...
Thanks to large-scale 3D printing, it is possible to fabricate performance-integrated building facades, contributing to the building sector's decarbonisation. The assessment of thermo-optical performance in 3D-printed facades (3DPF) is still at an early stage. The main challenges are related to the specificity of such components: the geometrical complexity, the interaction of multiple physical effects and the influence of the fabrication process on their properties. This focused review examines the aspects of performance indicators, multiphysics and multiscale modelling by reviewing recent efforts in the fields of advanced facades and process engineering. Learnings from the reviewed studies guided the development of a novel approach for modelling the thermo-optical properties of polymer 3DPF and informing their design.
... It is also easy to observe the presence of -phase particles. The coexistence of the  -and -phase gives an evidence that the  phase has a composition which is close to that of the equilibrium  phase [38]. ...
The thermoelectric power (TEP) and the electrical resistivity (ER) of Al–Mg–Si (balanced) and Al–Mg–Si–Cu (balanced + Cu) alloys have been measured in the temperature range 300–800 K. TEP and ER are found affected by different types of precipitates in the Al matrix. Addition of Cu refined the microstructure of the balanced alloy hence altered the TEP and ER measurements. Cu promotes the kinetics of artificial aging due to the formation of the Q′ phase and the intermediate phases which precipitate at earlier temperatures. The coexistence of the equilibrium β (Mg2Si) and the stable Q-phases results in stabilization of the TEP at elevated temperatures. The existence of Cu slightly increases the lattice rigidity leading to a decrease in the rate by which the ER increases with temperature. Repeating measurements after slow cooling of the two alloys changed considerably the results of TEP and ER. Correlation was found between different types of precipitates and changes in the TEP and ER indicating the possibility of employing TEP and ER measurements to study the precipitation sequence in such alloys.
An Al-11Mg 2 Si-Si in situ composite was prepared by a modified investment casting technique that employs sub-pressure for castability improvement and immersion of ceramic shell molds in fluidized beds of silica sand and iron particles for heat extraction improvement. The microstructure of the as-cast composite is explained according to the pseudoeutectic Al-Mg 2 Si phase diagram. The positive effect of a decreased number of mold investment layers and cooling assisted by immersion of the mold in a metallic bed on the tensile strength and hardness of the heat treated composite is noted. A minor presence of Fe in the master alloys constitutes an essential factor for the brittleness of the composite. Solution treatment notably im-proves the tensile strength of the composite; however, prolonged treatment deteriorates its ductility. The effect of time and temperature of the aging treatment on the hardness of the composite is investigated. The positive influence of cooling assisted by a metallic fluidized bed on the effectiveness of the aging treatment is noticed.
