Physical Properties Of Aluminium Research Articles

Exploratory Analysis on the Physical and Microstructural Properties of Aluminum/Fly-Ash Composite

Metal Matrix Composite (MMC) is an innovative material that has the ability to address demands in a number of industries, including mining, automotive, and aerospace. Stir casting is a well-known technique for making MMC. With weight fractions of 10%, 20%, 30%, and 40%, this study aims to analyze the impact of fly ash addition on the physical properties of aluminum (matrix) - FA (reinforcing phase) composites.The test for water absorbent was carried for each samples at 25°C immersed in water at different time interval of 24hrs, 48hrs, 72hrs, and 96hrs. The density test was carried out on the AL/FA composite samples. The water absorption test results showed that at 20wt% of fly ash composite, the optimum water absorption (0.4%) result was obtained at 24hrs, and also at 48hrs for 10wt%. The density of the composites increased with increasing amount of fly ash, and attained optimum of 4.08g/cm3 at 30wt%. The surface morphology of the samples was observed using digital metallurgical microscope. The scope of this study is to determine the physical and morphological properties of Al/FA reinforced composites.

Retraction: Experimental analysis and characterization of Mechanical, Physical properties of Aluminium (Al6061) Metal Matrix composite reinforced with SiC and Al2O3 using Stir casting (IOP Conf. Ser.: Mater. Sci. Eng. 1145 012109)

This article (and all articles in the proceedings volume relating to the same conference) has been retracted by IOP Publishing following an extensive investigation in line with the COPE guidelines. This investigation has uncovered evidence of systematic manipulation of the publication process and considerable citation manipulation.IOP Publishing respectfully requests that readers consider all work within this volume potentially unreliable, as the volume has not been through a credible peer review process.IOP Publishing regrets that our usual quality checks did not identify these issues before publication, and have since put additional measures in place to try to prevent these issues from reoccurring. IOP Publishing wishes to credit anonymous whistleblowers and the Problematic Paper Screener [1] for bringing some of the above issues to our attention, prompting us to investigate further.[1] Cabanac G, Labbé C and Magazinov A 2021 arXiv:2107.06751v1 Retraction published: 23 February 2022

Experimental analysis and characterization of Mechanical, Physical properties of Aluminium (Al6061) Metal Matrix composite reinforced with SiC and Al2O3 using Stir casting

Metal matrix is defined as two or more material mixing with each other, In these constituents, one is mainly metal and the other is non-metals such as ceramics, glass and rubber etc. There is a wide scope for metal matrix composites nowadays. Among various metal matrix composites, Aluminium MMC yields good results, when compared with other MMC (metal matrix composite These reinforcements have much higher strength and wear resistance than pure aluminium. Multiple reinforcements in an aluminium metal matrix composite have a lot of potential. The use of metal matrix composites with Al6061 as parent material and infusion of reinforcements like Carbides, Oxides and Borides have resulted in materials with improved mechanical strength and usability. This paper contains the investigation of Mechanical Properties of Aluminium 6061 and Aluminium 6061 reinforced with SiC, Al2O3 particles. In this, we are focusing Al MMC by undergoing various tests such as impact, hardness and tensile tests. In the present work, aluminium matrix hybrid composite of Al6061+ X wt% of Al2O3 + Y wt% of SiC (X = 2.5,5 % and Y = 5,2.5%) was successfully fabricated by stir casting method. The effect of Al2O3 and SiC reinforced in the matrix were investigated through tensile test, impact test, hardness values and SEM analysis (for Morphological characteristics) and the best composition of AMMC matrix was determined.

Synergetic effects of aluminium and indium dopants in the physical properties of ZnO thin films via spray pyrolysis

We report a comparative study of various physical properties of Aluminium and Indium co-doped Zinc Oxide (AIZO) thin films with singly doped films, namely Aluminium doped ZnO (AZO) and Indium doped ZnO (IZO) thin films. Thin films were deposited by Spray Pyrolysis technique at a substrate temperature 425 °C and the concentration of the dopants Aluminium (Al) and Indium (In) were varied from 0.5 to 2 at.% in an equimolar manner for co doping. The properties of the co doped films (AIZO) are compared with AZO 3 and IZO 3 thin films. The physical properties such as crystallinity, morphology, topography, luminescence, optical and electrical properties of the ZnO films with respect to the dopant concentrations are investigated. The (101) peak of ZnO was found to become prominent with increasing doping concentrations. At lower doping concentrations, the morphology was seen to be flower-like, whereas pyramidal grains were observed for highly doped films. The AIZO 1.5 film was seen to be highly transparent in the visible region and it showed an electrical resistivity of ρ=3.56×10−2Ωcm. The transmittance of films was found to increase with doping percentages and was comparable to that of AZO 3 and IZO 3 at high doping. The properties of the co-doped films were seen to be more AZO 3 - like at lower doping concentrations and it tends to be more like IZO 3 at higher doping percentages.

DFT calculations based insight into bonding character and strength of Fe2Al5 and Fe4Al13 intermetallics at Al-Fe joints

The joining of aluminum and steel has been considered as the efficient combination to develop lightweight and environmental friendly structures. However, due to the significant differences in mechanical and physical properties of aluminum and steel, the joining of these two metals is challenging, where typically several intermetallic phases are formed at the interface. Origin of intermetallic phases at the Al-Fe interface is inevitable due to the low intermixing of Al and Fe. Thus in order to achieve reliable joining, it is necessary to have basic understanding about these intermetallic phases. This paper aims to describe mechanical and bonding properties of the two most commonly observed phases, Fe4Al13 and Fe2Al5. The formation energy, elastic properties and nature of bonding of Fe4Al13 and Fe2Al5 have been calculated. The results show that Fe2Al5 is thermodynamically more stable than Fe4Al13, and it seems to be less brittle than Fe4Al13. Electron localization plots of these compounds show a combination of covalent and metallic bonding, where Fe4Al13 shows a stronger tendency of covalent character than Fe2Al5

Mechanical and physical properties of aluminum powder/MDF dust/polypropylene composites

This research concerns the using metal powders and MDF production wastes as alternative sources to natural fibers in manufacturing wood–plastic composites (WPCs). The objective of this work was to investigate the influence of various levels of MDF dust and aluminum powder (AlP) on physical and mechanical characteristics of MDF dust/polypropylene composite. Polypropylene was used as a thermoplastic matrix, and maleic anhydride grafted polypropylene (MAPP) as a coupling agent. Hot pressing method was used to prepare samples with 1g/cm3 nominal density. The mechanical and physical properties were measured according to the technical specifications CEN/TS15534 and ASTM standard D 570, respectively. It was found that mechanical properties decreased and water absorption and thickness swelling increased with increasing amount of MDF dusts and AlP. Applying field emission scanning electron microscopy (FE-SEM), the aluminum powder and composite morphology was studied.

Aluminum Involvement in the Progression of Alzheimer's Disease

The neuroanatomic specificity with which Alzheimer's disease (AD) progresses could provide clues to AD etiopathology. Magnetic resonance imaging studies of AD clinical progression have confirmed general conclusions from earlier studies of AD neuropathological progression wherein neurofibrillary tangle pathology was observed to spread along a well-defined sequence of corticocortical and corticosubcortical connections, preferentially affecting certain cell types, while sparing others. Identical and non-identical twin studies have consistently shown AD has mixed (environmental and genetic) etiopathogenesis. The decades-long prodromal phase over which AD develops suggests slow but progressive accumulation of a toxic or infective agent over time. Major environmental candidates are reviewed to assess which best fits the profile of an agent that slowly accrues in susceptible cell types of AD-vulnerable brain regions to toxic levels by old age, giving rise to AD neuropathology without rapid neuronal lysis. Chronic aluminum neurotoxicity best matches this profile. Many humans routinely ingest aluminum salts as additives contained in processed foods and alum-treated drinking water. The physical properties of aluminum and ferric iron ions are similar, allowing aluminum to use mechanisms evolved for iron to enter vulnerable neurons involved in AD progression, accumulate in those neurons, and cause neurofibrillary damage. The genetic component of AD etiopathogenesis apparently involves a susceptibility gene, yet to be identified, that increases aluminum absorption because AD and Down syndrome patients have higher than normal plasma, and brain, aluminum levels. This review describes evidence for aluminum involvement in AD neuropathology and the clinical progression of sporadic AD.

Ab initio tensile testing simulation of aluminum and aluminum nitride ceramics based on density functional theory

The ideal strength and mechanical behavior of aluminum, aluminum nitride, and their composites at zero temperature are investigated using ab initio norm conserving pseudopotential methods based on local density approximation. The total energy and stress of supercells which contain these atomistic models are calculated under uniaxial tensile strain. Estimated various physical properties of aluminum and aluminum nitride at equilibrium state are in good agreement with the experiment. The tensile test of the composite model shows a failure of the composite in the aluminum matrix. The ideal strength of these models is also estimated.

Climb kinetics of dislocation loops in aluminium

Abstract The climb kinetics of dislocation loops in thin foils in terms of either the emission of vacancies from the loop or the diffusion of vacancies to the surface has been critically examined. Although both mechanisms give similar rate equations, predictions can be made which allow the rate controlling process to be determined experimentally. The annealing behaviour of faulted and prismatic loops in quenched aluminium has been studied using quantitative electron microscopy techniques and shown to support a theory based on vacancy diffusion. Hence by comparing the annealing rates of faulted loops with those of prismatic loops as a function of temperature the stacking-fault energy of aluminium has been determined to be 135±20 ergs/cm2. This value is shown to be consistent with the physical properties of aluminium in relation to other metals.

Use of Aluminum Coils Instead of Copper Coils in Accelerator Magnet Systems

Use of aluminum windings for the ac injector-synchrotron and dc storage ring magnet systems has been studied. 1, 2 The injector synchrotron is an 18-Hz fast-cycling 8-GeV accelerator that feeds protons to the 200-GeV main ring. The physical properties of aluminum are discussed, as are the extrusion of the conductor and the winding of the coils. Also included is a discussion of cooling-system problems and their solution. Important design conditions for aluminum coils are given. An economic analysis of aluminum- and copper-coiled magnet systems is presented. As an example, the injector-synchrotron magnet system is compared to a dc storage-ring magnet system with the same magnetic characteristics. The optimum coil current density is discussed, as are the effect of gap field, economic life, and core shape on cost and optimum current density. Physical and economic advantages of aluminum coils for magnet systems are presented as are conditions under which the use of aluminum coils should be avoided.

The Effect of Cold-Work on the Physical Properties of Aluminium, with Special Reference to its Specific Electrical Resistance

Article The Effect of Cold-Work on the Physical Properties of Aluminium, with Special Reference to its Specific Electrical Resistance was published on December 1, 1931 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 80, issue 1-6).

The changes in physical properties of aluminium with mechanical work. II.—Specific heats of hard and soft aluminium

The changes in physical properties of aluminium with mechanical work. II.—Specific heats of hard and soft aluminium