Investigation on wear behaviour of Al7075-SiC metal matrix composites prepared by stir casting (original) (raw)
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2021
Application of particulate reinforced composite is being emphasized day by day due to its modified strength, high hardness, less weight, and ductility. This paper deals with the behaviour of physical, mechanical and tribological properties of aluminium matrix composite reinforced by micro-sized silicon carbide particles (in a various quantity such as 0, 3, 6 and 9 wt.%) prepared by stir casting fabrication process. With the increase in weight percentage of SiC reinforcement, the density of composite improves from 2.76 gm/cc to 2.83 gm/cc, and the porosity of composite reduces from 1.78% to 0.56%. UTS and Hardness of SiC particle reinforced aluminium matrix composites developed from 140 MPa to 205 MPa and 66 HV to 84 HV respectively. Microstructure reveals that strong bonding develops between matrix and reinforcement in terms of strength and hardness in all the formed composites compared to its matrix material. Comparatively less wear is observed with enhancing SiC content conducted ...
Study of Wear behaviour of Aluminium Metal Matrix Composite Reinforced with SiC
2016
Metal matrix composites (MMCs) constitute an important class of design and weight-efficient structural materials that are encouraging every sphere of engineering applications. There has been an increasing interest in composites containing low density and low cost reinforcements. Aluminium based metal matrix composites (MMCs) offer potential for advanced structural applications, high specific strength and modulus, as well as good elevated temperature resistance along with light weight and for marine applications. In the present work, aluminium-silicon carbide composite (Al-SiC) developed using a stir casting technique is studied for wear behaviour. The wear behaviour of the composite is investigated at room conditions at four different loads, 70N, 80N, 90N, 100N and with varying sliding speeds, i.e. 200, 300, 400, 500, 600, 700 rpm's, using a pin-on-disk wear testing machine. Variation of cumulative mass loss with the applied load, sliding speed, sliding distance and friction coe...
Wear Behaviour Analysis of Silicon Carbide based Aluminium Metal Matrix Composites
The group of light weight and highperformance aluminium centric material systems are referred as Aluminium Matrix Composites (AMCs). The properties of this metal can be enhanced by reinforcement of TiC,B4C,Al2O3, SiC, and graphite in volume fractions ranging from a few per cent to 60% in AMCs. Silicon Carbide (SiC) particles have been found to have an excellent compatibility with the aluminium matrix and can be obtained at low cost. The major part of applications of AMCs includes moving and sliding parts, hence the investigation of tribological properties of these materials is very important to understand the behaviour of composite materials while in service application. Therefore, present study focused on tribological properties (wear behaviour) of AA380 -SiC composite. The proposed AA380-SiC composites are to be fabricated by stir casting method with 15 % volume fraction of SiC particles and pin of 10 x 30 mm diameter and height are to be cut. The wear behaviour tests are to be carried at table 2 conditions using pin-on disc wear testing equipment. From the proposed result effect of test parameters on aluminium matrix alloy and silicon carbide-based aluminium metal matrix composites are to be studied. Further by using Taguchi's technique the results are to be tabulated in Minitab -17 software to analyse the effect of each input parameter on the wear rate.
Review on Effect of Silicon Carbide (SiC) on Stir Cast Aluminium Metal Matrix Composites
The importance of composites as engineering materials is reflected by the fact that out of over 1600 engineering materials available in the market today more than 200 are composites. These composites initially replaced Cast Iron and Bronze alloys but owing to their poor wear and seizure resistance, they were subjected to many experiments and the wear behavior of these composites were explored to a maximum extent and were reported by number of research scholars for the past 25 years. In the present study, based on the literature review, the effect of Silicon carbide on Stir cast Aluminium Metal Matrix Composites is discussed. Aluminium Metal Matrix Composites with Silicon carbide particle reinforcements are finding increased applications in aerospace, automobile, space, underwater, and transportation applications. This is mainly due to improved mechanical and tribological properties like strong, stiff, abrasion and impact resistant, and is not easily corroded. In the present scenario, a review of different researchers have been made to consolidate some of the aspects of mechanical and wear behavior of Aluminium Metal Matrix Composites reinforced with Silicon carbide particles in both untreated and precipitation hardened condition.
Wear Behavior of Al-Si Alloy Matrix Composites Reinforced with SiC Particles
2017
The aim of the present work is to study a dry sliding wear behavior of (Al – 12wt % Si) alloy reinforced with 5wt% SiC particles. Metal matrix composite samples were prepared by stir casting using vortex technique and squeeze casting under varying casting pressures from 7.5 to 53MPa , and mold preheated at temperature (200oC). Pin-on-Disk wear tests were conducted at varying loads from 5 to 20 N under a constant sliding speed of 2.7 m / sec. The results showed microstructure refinement with increasing the squeeze pressure. This correlated with increased hardness and reduced wear rate. It was also determined that the composites produced by squeeze casting had better wear resistance than of stir casting
IAEME PUBLICATION, 2019
Metal matrix composites of aluminum alloy reinforced with nano silicon carbide reinforcement are useful in highly stressed parts of an aircraft, automobile and many industrial sectors because of their higher strength, good resistance to fatigue and corrosion. AA7075 reinforced with many particulates in developing various MMC’s have been revealed significant wear resistance of MMC’s research work. In this work, AA7075 metal matrix is chosen and it is reinforced with 500nm(0.5micron) silicon carbide powder as a reinforcement. The MMC’s samples have been prepared by low cost stir cast method. The silicon carbide was increased incrementally from 2% to 8% wt. fractions. Wear behavior of these specimens were observed using Pin and Disc experimental setup and the results shows improved wear resistance as the percentage of the reinforcement material increased. This work also contains EDX analysis of tested samples and from the EDX analysis it is ensured that along with major compositions of metal matrix are combined with the reinforced material.
WEAR BEHAVIOUR OF SiC REINFORCED Al6061 ALLOY METAL MATRIX COMPOSITES BY USING TAGUCHI'S TECHNIQUES
In this present work, an attempt has been made to optimize the wear properties of Al6061-SiC particulate composites. The composites containing 6 to 9 wt% of Silicon Carbide in steps of 3 wt% were prepared using liquid metallurgy route in particular stir casting technique. For each composite, reinforcement particles were preheated to a temperature of 300˚C and then dispersed in steps of two into the vortex of molten Al6061 alloy to improve the wettability and distribution. Dry sliding wear test method was used to conduct the experiments by using Ducom made pin-on-disc wear testing machine. Twenty seven experiments were carried out with the help of Taguchi L 27 Orthogonal array. The influence of applied load, sliding speed and sliding distance on volumetric wear loss was estimated. Smaller the better parameter was chosen to optimize the wear process of prepared composites. Results show that applied load has the highest influence followed by speed and sliding distance.
THE IRAQI JOURNAL FOR MECHANICAL AND MATERIALS ENGINEERING
ABSTRACTThe aim of this research is to study the mechanical properties and wear behavior of aluminum composite material (AMCs) reinforced with silicon carbide particles with varying percentages (0, 3, 6 and 9) wt. %. These composites samples were prepared by stir casting process. Tensile strength, compression strength, hardness and wear resistance of the prepared composites were analyzed. The result showed that adding SiC reinforced in Al matrix increased tensile strength, compression strength, wear resistance and hardness with increased wt. percentage of silicon carbide reinforced AMCs. Maximum tensile and compression strength and hardness showed at 9 wt. percentage SiC reinforced AMCs.
Advanced Composites Letters
In the present investigation, wear test is conducted on a pin-on-disc device at room temperature for both the age hardening and without age hardening conditions. Al7075 has been chosen as the matrix material. Hybrid aluminum metal matrix composites are produced utilizing stir casting route for enhancing the wear behavior and hardness number. The reinforcement used is silicon carbide with 5, 10, and 15 wt% and alumina as the reinforcement in 5, 10, and 15 wt%. In the aluminum matrix, microstructural characterization reveals homogeneous mixing of reinforcements. This investigation shows that the enhanced wear resistance is due to the increment weight fraction of reinforcement. By raising the sliding speeds, there is a reduction in the rate of wear and it reduces with increment in the sliding distance. With increasing weight fraction, there is decrement in the rate of wear of composites. In general, tribological property enhances because of the addition of the two reinforcements.
The Aluminium Al6061 alloys are mainly used in the application of automobile and aeronautical applications. An attempt has been made to increase the mechanical and tribological property of Al6061 alloy by adding SiC particulates as reinforcements. The particle size of SiC particles is 400μm. Hybrid metal matrix composite is prepared by Stir casting route and Friction and wear test is done by pin-on-disc method. Al6061T6 hybrid composites are used in automobile components for reliable, long life and high performance. Experiments were conducted based on the plan of experiments generated through Taguchi's technique. A L 9 Orthogonal array was selected for analysis of the data. Purpose of investigation is to find the influence of applied load, sliding speed and sliding distance on wear rate, as well as the coefficient of friction during wearing process was carried out using ANOVA and regression equation. Objective of the model was chosen as "smaller the better" characteristics to analyse the dry sliding wear resistance. Results show that sliding distance has the highest influence on wear rate followed by sliding speed and load. Sliding distance has the highest influence on wear rate followed by load and sliding speed.