Investigations into Deformation Characteristics during Open-Die Forging of SiCp Reinforced Aluminium Metal Matrix Composites (original) (raw)
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Effect of Forging Condition on Mechanical Properties of Al/SiC Metal Matrix Composites
International Journal of Engineering Research and, 2015
The objective of the research work to investigate effect of forging condition on mechanical properties of Al/SiC composites prepared in open die at the temperature of 450 °C with three different stages then specimens are aged at T6 conditions. Forged specimens subjected tensile, compression and hardness tests to evaluate effect of forging levels on Al/SiC composites. The effect of plastic deformation and high temperature during forging led to a recrystallization of the Al/SiC matrix with a grain refinement. At first and second stage higher grain refine could be seen but at third stage no further grain refinement could be absorbed. The modification of grain which was influenced an enhancement in the mechanical strength. The scanning electron microscope shows the brittle and ductile mixture failure was absorbed in all type of the specimens. Forging improve the mechanical properties with nominal loss of ductility.
IJERT-Effect of Forging condition on Mechanical Properties of Al/SiC Metal Matrix Composites
International Journal of Engineering Research and Technology (IJERT), 2015
https://www.ijert.org/effect-of-forging-condition-on-mechanical-properties-of-alsic-metal-matrix-composites https://www.ijert.org/research/effect-of-forging-condition-on-mechanical-properties-of-alsic-metal-matrix-composites-IJERTV4IS050635.pdf The objective of the research work to investigate effect of forging condition on mechanical properties of Al/SiC composites prepared in open die at the temperature of 450 °C with three different stages then specimens are aged at T6 conditions. Forged specimens subjected tensile, compression and hardness tests to evaluate effect of forging levels on Al/SiC composites. The effect of plastic deformation and high temperature during forging led to a recrystallization of the Al/SiC matrix with a grain refinement. At first and second stage higher grain refine could be seen but at third stage no further grain refinement could be absorbed. The modification of grain which was influenced an enhancement in the mechanical strength. The scanning electron microscope shows the brittle and ductile mixture failure was absorbed in all type of the specimens. Forging improve the mechanical properties with nominal loss of ductility.
International Journal of Material Forming, 2009
Particle reinforced light metal matrix composites (MMC) were manufactured by thermal spraying of semi-finished material (atomisation and co-deposition of reinforcement particles and metal melt), followed by inductive reheating and semi-solid forging. The matrix alloy was Al Mg3, silicon carbide was used as particulate reinforcement. Semi-finished material processing was optimised regarding particle size and temperature distribution during material deposition in order to obtain a suitable microstructure for subsequent semi solid processing. Twin wire electric arc spraying with cored wires was applied, providing the matrix and reinforcement materials at the same time for simultaneous deposition. Process analysis was made by in-flight particle diagnostics. Semi-solid processing ability of the MMC material after thermal spraying was verified by manual deformation testing. Inductive reheating of the particle reinforced material was coupled with fast semi-solid forging by an axial press into a closed, plate-shaped die. Optical and Scanning Electron Microscopy showed some inhomogeneity in the SiC particle distribution. However, mechanical properties from tensile and 4-point bending experiments were encouraging.
Journal of Minerals and Materials Characterization and Engineering, 2012
The present paper examines the deformation behavior of solid cylinders of an aluminium alloy metal matrix composite (MMC) undergoing axial compression in a Universal Testing Machine under dry condition. The composite was prepared by the stir casting method from LM6 aluminium alloy using silicon carbide particles (SiC) as reinforcing agent. The effect of weight percentage of silicon carbide on microstructure, hardness and upsetting load is studied. The friction factor at die metal interface is evaluated by ring compression tests and its effect on non-uniform deformation is investigated. The experimental results are finally compared with those obtained by FEM simulation.
Mould Temperatureand Mechanical Properties of Cast Aluminum - Silicon Carbide Composite
Effect of mou ld preheating on the mechanical properties of stir cast Al-SiC has been studied. The silicon carbide part icles (83 ) are washed with distilled water, oven dried at 100℃ for 2hours prior to use. The mou ld temperature is varied fro m 200-600℃before the molten mixture is poured into it. Cast samples are divided into three groups, heated to 400 o C normalized, annealed and quenched. These heat treated samples are then subjected to mechanical and structural analyzes. Results show that tensile strength and hardness decline with rise in mould temperature while elongation and impact strength increase. The highest tensile strength (~57M Pa) is recorded for quenched samples at mould temperature of 200 0 C and the lowest (~35 MPa) in annealed samples at the same mou ld temperature.The hardness increase considerably withquenched>normalised>annealed.
Metal matrix composites are the resultant of combination of two or more elements or compounds, possessing enhanced characteristics than the individual constituents present in them. This paper deals with the fabrication of Al 2014-SiC composite and investigation of its Microstructure and Mechanical properties. 2014 Aluminium alloy is characterized by good hardness. It is selected as the base metal. The Silicon Carbide is characterized by good strength and low density (3.21 g/cm3). It is chosen as the reinforcement. Silicon Carbide is coated with Nickel by electroless method to increase its wettability and binding properties. The fabrication of metal matrix composites is done by stir casting in a furnace, by introducing the required quantities of reinforcement into molten Aluminium alloy. The reinforcement and alloy is mixed by means of stirring, with the help of a stirrer. The base alloy and the composites are then tested for mechanical properties such as tensile strength, flexural strength, impact strength and hardness. The fabricated samples have higher tensile strength and impact strength than the alloy. Microstructure of the samples, are analyzed using optical microscope.
International Journal of Manufacturing Engineering, 2014
A356/SiC metal matrix composites with different weight percent of SiC particles were fabricated by two different techniques such as mechanical stir casting and electromagnetic stir casting. The results of macrostructure, microstructure, and XRD study revealed uniform distribution, grain refinement, and low porosity in electromagnetic stir casing samples. The mechanical results showed that the addition of SiC particles led to the improvement in tensile strength, hardness, toughness, and fatigue life. It indicates that type of fabrication process and percentage of reinforcement are the effective factors influencing the mechanical properties. It is observed that when percentage of reinforcement increases in electromagnetic stir casting, best mechanical properties are obtained.
International Journal of Engineering Research and Technology (IJERT), 2013
https://www.ijert.org/a-study-of-microstructure-and-mechanical-properties-of-aluminium-silicon-carbide-metal-matrix-composites-mmcs https://www.ijert.org/research/a-study-of-microstructure-and-mechanical-properties-of-aluminium-silicon-carbide-metal-matrix-composites-mmcs-IJERTV2IS90295.pdf In the present study, silicon carbide particulate reinforced LM6 alloy matrix composites were produced by gravity die casting process by varying the particulate addition by weight fraction on percentage basis. Mechanical properties such as tensile, impact and wear test studies were conducted to determine the tensile strength, ductility, toughness and wear characteristics of cast MMC's. Micro structural properties of the as cast composites have also studied by using optical microscope. The experimental result reveals that the tensile property increases with increase in Sic, the toughness of composite decreases as silicon carbide percentage increases and the composite showed accountable increase in wear rate of cast MMC.