" Impact of Aluminum Alloys and Microstructures on Engineering Properties -Review " (original) (raw)
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In recent year's aluminum and aluminum alloys are widely used in automotive industries. These are light weight (density of about 2.7g/cc),having good malleability and formability, high corrosion resistance and high electrical and thermal conductivity. High machinability and workability of aluminum alloys are prone to porosity due to gases dissolved during melting processes. However, in the engineering application pure aluminum and its alloys still have some problems such as relatively low strength, unstable mechanical properties. The microstructure can be modified and mechanical properties can be improved by alloying, cold working and heat treatment in this regards, this paper reports the influences of some alloying elements on the microstructures and mechanical properties of Aluminum alloys and aluminum alloy composites.
International journal of engineering and technology, 2020
In recent year’s aluminum and aluminum alloys are widely used in automotive industries. These are light weight (density of about 2.7g/cc),having good malleability and formability, high corrosion resistance and high electrical and thermal conductivity. High machinability and workability of aluminum alloys are prone to porosity due to gases dissolved during melting processes. However, in the engineering application pure aluminum and its alloys still have some problems such as relatively low strength, unstable mechanical properties. The microstructure can be modified and mechanical properties can be improved by alloying. In this paper, the effect of addition of the alloying element on Aluminum Alloys and to study the modification of the iron intermetallic andthe microstructural refinement through the formation of secondary phases. The microstructure can be modified and mechanical properties can be improved by alloying, cold working and heat treatment in this regards, this paper reports...
This paper presents the study of different mechanical properties such as Hardness, Tensile strength, Impact strength, Flexural strength, Fatigue strength and Corrosion resistance of newly developed Aluminium-based alloys. The addition of Silicon and Copper will improve the property of the Aluminium alloy. The specimens were prepared with the help of Electric furnace using Stir casting method and the tests were conducted at atmospheric condition. The prepared specimen was subjected to special heat treatment T6 process of 540 0 at 6 hours followed by quenching then cools the specimen for 3 hours in atmospheric condition. After that the annealing process is followed at a temperature of 150 0 at 6 hours. The mechanical properties of Heat treated alloys were improved as compared to the as-cast condition. Also in this kind of alloys may be subjected to use in various applications like Engine bearings, cylinder liner, pistons etc.
Frontiers in Materials
In the current work, the standard A242 aluminum cast alloy is modified using the stir casting method with titanium (Ti) (0.5% wt.) and boron (B) (0.1% wt.) modifiers. Polarized optical and scanning electron microscopy were utilized to examine the A242 base microstructure, and A242 + TiB modified alloys; the results revealed that the modified A242 + TiB alloy was refined by 13.5 times more than the as-cast alloy. The mechanical properties were investigated experimentally using compression test in addition to the hardness test; the results revealed that the ultimate compressive strength of the A242 + TiB modified alloy was increased by 9.0% more than those of the A242 standard alloy. Moreover, the yield stress was enhanced by 40% at room temperature and 20% at 250 °C. The dynamic properties were studied using a free vibration impact test to study the modifiers’ effect on the dynamic behavior. The grain refinement notably impacted the damping capacity; due to the as-cast inhomogeneity,...
Effect of hardening conditions on aluminum alloy microstructure
Metal Science and Heat Treatment, 2012
The microstructure of cast alloy Al-8.88% Si-3.38% Cu is studied after isothermal hardening at 65°C for 1-90 min using light microscopy, X-radiography, and a scanning electron microscope with energy dispersion analysis. After isothermal hardening alloy is aged at 525°C. The duration of isothermal exposure is established in order to obtain high alloy hardness.
Chiang Mai Journal of Science, 2022
This experimental project is dealt with two high-strength aluminium alloys, termed Al2016, Al2618. Objective of this research is to contribute to a good clarifi cation on microstructural and tensile properties of distinct grades of Al2016 and Al2618 alloys to be used in the aerospace fi eld as skin materials. These two different grades of twin-rolled aerospace metallic materials were received for investigation after those were subjected to two different conditions of heat treatment processes namely artifi cially aging and overaging. Those four specially processed alloys are specifi ed as Al2016-T6510, Al2016-T7510, Al2618-T6510, and Al2618-T7510 based on the treatment. This article discusses the physical characteristics and tensile behavior of those alloys through the outcome of light microscopy test and tensile tests. Particle size variations and origination of grains play a major role in mechanical behavior. When comparing the various tensile properties of radial longitudinal and transversely oriented specimens of all specifi ed graded alloys possess almost a similar tensile behavior between each grade. Broken specimens of tensile tests were employed for investigating the fractographic conditions through scanning electron microscopy. As result, ductile ruptures were commonly registered in all the grades of materials whereas the evidence for intergranular fracture was found in Al2016-T6; and a transgranular fracture was noti ced in Al2016-T6. Amongst all the grades, a greater number of intergranular compounds were found in the Al2618-T6 alloy. T6 and T7 conditioned alloys of both grades revealed that the denseness of precipitation increases due to overaging, which in turn ends in declination of ductility. In general, other attributes of such T7 conditioned aluminium alloys have contributed well to elevated temperature applications especially, in stress corrosion cracking resistance.
Journal of Materials Engineering and Performance, 2004
The 6XXX series aluminum alloys (Al-Mg-Si) are widely used in many different engineering and architectural applications. These alloys usually undergo a thermal treatment, which consists of a heat treatment solution and artificial aging, since the desirable mechanical properties depend on the microstructural state of the material. The recycling of materials has been increasing recently for economic and ecologic reasons. By using scrap as raw material, important reductions in energy and total costs can be achieved, and, at the same time, negative environmental impacts can be greatly reduced. In the present work, the possibility of using a larger amount of scrap as raw material in the production of an AA 6060 alloy is evaluated by analyzing the difference in microstructure and mechanical properties between a commercial 6060 alloy and a variation with higher Fe and lower Si contents that was specially produced for this study. Both materials were placed into a heat treatment solution at 560°C for 1 h, and then underwent water quenching followed by artificial aging at 180°C for different periods of time. Hardness and tension tests were used to evaluate the mechanical properties. Light and transmission electron microscopy have been used to determine important features such as grain size before and after being placed into the heat treatment solution, and the characteristics of the second-phase particles in the two materials. This study leads to the conclusion that a higher amount of scrap material can be used in the production of 6060 Al alloy without significant changes in mechanical properties compared with the more usual compositions.
A Study of Microstructure and Mechanical Property of Aluminium – Alumina Metal Matrix
Aluminium alloys are widely used in aerospace and automobile industries due to their low density and good mechanical properties, better corrosion resistance and wear, low thermal coefficient of expansion as compared to conventional metals and alloys. The excellent mechanical properties of these materials and relatively low production cost make them a very attractive candidate for a variety of applications both from scientific and technological viewpoints. The aim involved in designing metal matrix composite materials is to combine the desirable attributes of metals and Ceramics. Present work is focused on the study of behaviour of Aluminium Cast Alloy (LM6) with and Al2O3 composite produced by the stir casting technique. Different % age of reinforcement is used. Tensile test, Impact test and wear test performed on the samples obtained by the stir casting process. optical microscope was performed to know the presence of the phases of reinforced material.
IJERT-A Study of Microstructure and Mechanical Property of Aluminium - Alumina Metal Matrix
International Journal of Engineering Research and Technology (IJERT), 2013
https://www.ijert.org/a-study-of-microstructure-and-mechanical-property-of-aluminium-alumina-metal-matrix https://www.ijert.org/research/a-study-of-microstructure-and-mechanical-property-of-aluminium-alumina-metal-matrix-IJERTV2IS90017.pdf Aluminium alloys are widely used in aerospace and automobile industries due to their low density and good mechanical properties, better corrosion resistance and wear, low thermal coefficient of expansion as compared to conventional metals and alloys. The excellent mechanical properties of these materials and relatively low production cost make them a very attractive candidate for a variety of applications both from scientific and technological viewpoints. The aim involved in designing metal matrix composite materials is to combine the desirable attributes of metals and Ceramics. Present work is focused on the study of behaviour of Aluminium Cast Alloy (LM6) with and Al2O3 composite produced by the stir casting technique. Different % age of reinforcement is used. Tensile test, Impact test and wear test performed on the samples obtained by the stir casting process. optical microscope was performed to know the presence of the phases of reinforced material.
Recent development in aluminium alloys for the automotive industry
Materials Science and …, 2000
The growing demand for more fuel-efficient vehicles to reduce energy consumption and air pollution is a challenge for the automotive industry. The characteristic properties of aluminium, high strength stiffness to weight ratio, good formability, good corrosion resistance, and recycling ...