scholarly journals Mechanical and tribological properties of As-cast Al6061-Tungsten carbide metal matrix composites

2010 ◽  
Vol 7 (2) ◽  
pp. 355-368 ◽  
Author(s):  
A. R. K. Swamy ◽  
A. Ramesha ◽  
J. N. Prakash ◽  
G. B. Veeresh Kumar
Keyword(s):  
Wear Resistance ◽  
Tungsten Carbide ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Base Alloy ◽  
Matrix Alloy ◽  
Mechanical Tests ◽  
Matrix Composites ◽  
Abrasive Resistance ◽  
Casting Technique

The Aluminum (Al) and its alloys are finding extensive applications in industries like automobile, aerospace and marine fields. Aluminum-based Metal Matrix Composites (MMC?s) reinforced with hard particulates offer superior operating performance and resistance to wear. Al based MMC materials provide higher abrasive resistance and provide a longer service life compared to other materials. The popularity of composites may be the reason that these composites possess good mechanical properties, good corrosion resistance, wear resistance in addition they are light-in-weight. In this paper it is aimed to present the experimental results of the studies conducted related to hardness, tensile strength, and compression strength of Al6061-Tungstan Carbide (WC) composites. The composites were prepared using the liquid metallurgy technique (stir casting technique), in which 0-4 wt. % of reinforcing tungsten carbide particulates were dispersed into the base matrix alloy in steps of 1%. The obtained cast composites of Al6061-WC and unreinforced base alloy was subjected mechanical tests and composites were subjected to microstructural examination. The test results reveal that the hardness and strength of the alloy has increased monotonically. The wear resistance obtained using computerized pin on disc wear tester with counter surface as EN31 steel disc (HRC60) and the composite pin as specimens, demonstrated the superior wear resistance property of the composites.

scholarly journals Impact on Mechanical Properties of Hybrid Aluminum Metal Matrix Composites

2019 ◽  
Vol 8 (6) ◽  
pp. 1638-1645 ◽  
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Hybrid Composites ◽  
Base Alloy ◽  
Mechanical Tests ◽  
Matrix Composites ◽  
Cast Aluminum ◽  
Alloy Matrix ◽  
Aluminum Metal ◽  
Aluminum Metal Matrix Composites

Hybrid composites are those composites which have a combination of two or more reinforcements in a single matrix. In this study, Hybrid Aluminum Metal Matrix Composites were fabricated by using Stir Casting technique. Hybrid composites with three reinforcements such as Aluminum oxide(Al2O3 ), Silicon Carbide (SiC) and Boron Carbide (B4C) in different proportions are considered and Aluminum alloy 6061-T6 (Al6061) as base alloy matrix. Later, the cast aluminum metal matrix composites were machined as per ASTM standards with required dimensions. Mechanical tests such as tensile, flexural, Charpy impact, Brinell Hardness tests were conducted on the composites fabricated inorder to evaluate effect of reinforcements. Morphological study of the composites is carried out by using Scanning electron microscope (SEM). The test results were studied and analyzed.

Effect of squeezing on porosity and wear behaviour of partially remelted A319/20 vol% SiCp metal matrix composites

2008 ◽  
Vol 222 (3) ◽  
pp. 295-303 ◽  
Author(s):  
T S Mahmoud ◽  
F H Mahmoud ◽  
H M Zakaria ◽  
T A Khalifa
Keyword(s):  
Wear Resistance ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Wear Test ◽  
Weight Fraction ◽  
Stir Casting ◽  
Wear Behaviour ◽  
Matrix Composites ◽  
Casting Technique ◽  
Cast Composites

This article describes the effect of the squeezing process on the porosity of partially remelted A319/20 vol% SiC particulate (SiCp) reinforced metal matrix composites (MMCs). The composite alloy was originally fabricated by a stir casting technique. The effect of squeezing process parameters such as the squeezing time, compressive stress, and the liquid weight fraction inside the melt on the overall porosity was extensively studied. Moreover, pin-on-disc wear tests were conducted to evaluate the effect of porosity on the wear resistance of the composites. It was found that the squeezed composites have lower overall porosity when compared with the as-cast composites. The lowest overall porosity content was observed when the squeezing process variables were at their peak values. After squeezing, the gas-bubble voids were practically eliminated, whereas the inter-particle voids were significantly reduced but not completely eliminated due to fracture of SiCp and generation of new inter-particle microvoids. Wear test results showed that the wear resistance of the squeezed composites was significantly higher than the as-cast composites due to the lower porosity content of the squeezed composites. The wear resistance of the squeezed composites depends significantly on the overall porosity. It has been found that the wear rate of the squeezed composites increase with increasing overall porosity.

A Review on Optimization of Friction and Wear Parameters (Al Alloy-B4C) Composite Using Taguchi Technique

2015 ◽  
Vol 813-814 ◽  
pp. 491-497
Author(s):  
Vishwanath Prasad ◽  
V.K. Soni ◽  
R.S. Rana
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Coefficient Of Thermal Expansion ◽  
Signal To Noise Ratio ◽  
Matrix Alloy ◽  
Al Alloy ◽  
Matrix Composites ◽  
Sliding Velocity

Metal matrix composites (MMCs) have proved their viability as good alternatives to conventional alloys in high strength and stiffness application in industries like automobile, aerospace and mineral processing. Al metal matrix composites (MMCs) are being considered as a group of advanced materials for their lightweight, low coefficient of thermal expansion, and good wear resistance properties. The optimization of parameter has been done by using different techniques like Taguchi, DOE and their results were verified by ANOVA. Signal-to-noise ratio and Analysis of variance (ANOVA) were used to investigate the influence of parameters on the wear rate. Based on various papers the conclusion of this review paper is to study the influence of applied load, sliding speed and sliding distance on the various parameter such as optimum wear and co-efficient of friction of Al alloy-B4C composite to enhance the quality of product and suggest the best combination of wear parameter which helps to reduce the wear of product with the help of Taguchi method. The wear resistance of the composite was found to be considerably higher than that of the matrix alloy and increased with increasing particle content. The major observation based on reviewed papers is that the major factor in determining the wear rate is load applied followed by distance and sliding velocity whereas distance affects the coefficient of friction to a large extent followed by load and sliding velocity.

TEM examination of 2014-SiC metal matrix composite

1988 ◽  
Vol 46 ◽  
pp. 726-727
Author(s):  
M. G. Burke ◽  
M. N. Gungor ◽  
P. K. Liaw
Keyword(s):  
Metal Matrix Composite ◽  
Metal Matrix Composites ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Tensile Deformation ◽  
Microstructural Characterization ◽  
Thin Foil ◽  
Matrix Alloy ◽  
Matrix Composites ◽  
Ion Milling

Aluminum-based metal matrix composites offer unique combinations of high specific strength and high stiffness. The improvement in strength and stiffness is related to the particulate reinforcement and the particular matrix alloy chosen. In this way, the metal matrix composite can be tailored for specific materials applications. The microstructural characterization of metal matrix composites is thus important in the development of these materials. In this study, the structure of a p/m 2014-SiC particulate metal matrix composite has been examined after extrusion and tensile deformation.Thin-foil specimens of the 2014-20 vol.% SiCp metal matrix composite were prepared by dimpling to approximately 35 μm prior to ion-milling using a Gatan Dual Ion Mill equipped with a cold stage. These samples were then examined in a Philips 400T TEM/STEM operated at 120 kV. Two material conditions were evaluated: after extrusion (80:1); and after tensile deformation at 250°C.

scholarly journals Improvement in Hardness and Wear Behaviour of Iron-Based Mn–Cu–Sn Matrix for Sintered Diamond Tools by Dispersion Strengthening

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1774
Author(s):  
Elżbieta Cygan-Bączek ◽  
Piotr Wyżga ◽  
Sławomir Cygan ◽  
Piotr Bała ◽  
Andrzej Romański
Keyword(s):  
Wear Resistance ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Base Material ◽  
Wear Behaviour ◽  
Matrix Composites ◽  
Diamond Tools ◽  
Abrasion Wear ◽  
Sintered Diamond ◽  
Abrasive Stone

The work presents the possibility of fabricating materials for use as a matrix in sintered metallic-diamond tools with increased mechanical properties and abrasion wear resistance. In this study, the effect of micro-sized SiC, Al2O3, and ZrO2 additives on the wear behaviour of dispersion-strengthened metal-matrix composites was investigated. The development of metal-matrix composites (based on Fe–Mn–Cu–Sn–C) reinforced with micro-sized particles is a new approach to the substitution of critical raw materials commonly used for the matrix in sintered diamond-impregnated tools used for the machining of abrasive stone and concrete. The composites were prepared using spark plasma sintering (SPS). Apparent density, microstructural features, phase composition, Young’s modulus, hardness, and abrasion wear resistance were determined. An increase in the hardness and wear resistance of the dispersion-strengthened composites as compared to the base material (Fe–Mn–Cu–Sn–C) and the commercial alloy Co-20% WC provides metallic-diamond tools with high-performance properties.

scholarly journals Processing and Property Evaluation of Nano Al2O3 Reinforced Copper- 5% Tin Composites for Bearing Applications

2019 ◽  
Vol 8 (2S8) ◽  
pp. 1027-1032
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Yield Strength ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Copper Matrix ◽  
Matrix Composites ◽  
Wear Properties ◽  
Casting Technique ◽  
Tin Metal

Nano technology has fascinated the attention of numerous material scientists and design engineers. The nano scaled particulates incorporation exhibit many attractive and special properties. The inclusion of nano particulates into the copper matrix might augments the hardness, ultimate tensile strength and yield strength significantly increases, maintaining the ductility. In this paper, the nano Al2O3 reinforced copper - 5%tin- metal matrix composites were manufactured by stir casting technique and reinforcement is varied from 0wt. % to 9wt. % in ventures of 3wt. %. The nano composites are characterized in terms of their mechanical and wear properties. Results revealed that, the distribution of nano Al2O3 particulates is fairly uniform in copper - 5%tin metal matrix. As the level of reinforcement increases, hardness, yield strength, ultimate tensile strength, and wear resistance of the copper - 5%tin – nano Al2O3 metal matrix composites increases. The developed nano metal matrix composites may be an alternative material for bearing applications

Process optimization using grey relational analysis in dry sliding wear behavior on SiC/B4C/Talc reinforced Al 6061 hybrid metal matrix composite

2021 ◽  
Vol 118 (6) ◽  
pp. 614
Author(s):  
Chellamuthu Ramesh Kumar ◽  
Subramanian Baskar ◽  
Ganesan Ramesh ◽  
Pathinettampadian Gurusamy ◽  
Thirupathy Maridurai
Keyword(s):  
Wear Resistance ◽  
Metal Matrix ◽  
Wear Behavior ◽  
Base Alloy ◽  
Specific Weight ◽  
Dry Sliding Wear ◽  
Wear Properties ◽  
Weight Percentage ◽  
Casting Technique ◽  
Grey Relational

In this research, investigations were carried out on Al6061 base alloy with the changing weight percentage of silicon carbide (SiC) and boron carbide (B4C) with keeping the amount of talc constant. The main objective of this present study was to improve the wear resistance of aluminum alloy using SiC/B4C/talc ceramic particles using stir-casting technique and how the eco-friendly talc content influencing the solid lubricity during the abrasion process. The experiments were conducted via orthogonal array of L27 using Taguchi’s method. The optimum value along with the coefficient of friction was obtained on the basis of grey relational equations and ANOVA, which helped in analysis of most influential input parameters such as applied load, sliding speed, sliding distance and percentage of reinforcement. Conformation tests were performed for the purpose of validation of the experimental results. The specimens were analyzed using scanning electron microscope (SEM) with EDX for micro structural studies. The SiC, B4C and talc presence in the composite helped to improve the mechanical properties, according to the results. The presence of solid lubricant talc as reinforcement to the aluminum hybrid composite reduced the wear properties and decreased the co-efficient friction. These wear resistance improved aluminum metal matrix composites could be used in automobile, defense and domestic applications where high strength and wear resistance required with lesser specific weight.

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