scholarly journals Wear Behaviour of ZA27/SiC/Graphite Composites under Lubricated Sliding Conditions

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3752
Author(s):  
Nenad Miloradović ◽  
Rodoljub Vujanac ◽  
Ana Pavlović
Keyword(s):  
Wear Resistance ◽  
Base Alloy ◽  
Matrix Material ◽  
Wear Behaviour ◽  
Casting Technique ◽  
Za27 Alloy ◽  
Graphite Composites ◽  
Sliding Distance ◽  
Electronic Microscope ◽  
Lubricated Sliding

The composites samples based on ZA27 alloy were subjected to tribological tests and the observed results are presented in this paper. The samples (ZA27/5%SiC and ZA27/5%SiC/5%Gr) were obtained by compo-casting technique. Their wear behaviour was compared to the base alloy. The wear tests were done by using a block-on-disc tribometer under lubricated sliding conditions. Tribological investigation were conducted for three normal loads (40 N, 80 N, and 120 N), three sliding speeds (0.25 m/s, 0.5 m/s, and 1 m/s), and sliding distance of 1200 m. The tested materials were analysed by the scanning electronic microscope (SEM) and the energy dispersive spectrometry (EDS). The presence of oil lubricant improved the wear resistance and friction behaviour of both composites and base alloy. The tested composites show much higher wear resistance than the corresponding matrix material. It was established that the ZA27/5%SiC/5%Gr hybrid composite has best tribological properties.

scholarly journals Dry Sliding Wear Performance of ZA27/SiC/GraphiteComposites

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 717 ◽  
Author(s):  
Nenad Miloradović ◽  
Rodoljub Vujanac ◽  
Slobodan Mitrović ◽  
Danijela Miloradović
Keyword(s):  
Energy Dispersive Spectrometry ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Wear Performance ◽  
Casting Technique ◽  
Za27 Alloy ◽  
Sliding Distance ◽  
Wear Tests ◽  
Electronic Microscope ◽  
Composite Samples

The paper describes the wear performance of zinc-aluminium ZA27 alloy, reinforced with silicon-carbide (SiC) and graphite (Gr) particles. The compo-casting technique produced the composite samples. The tested samples were: ZA27 alloy, ZA27/5%SiC composite, and ZA27/5%SiC/3%Gr hybrid composite. A block-on-disc tribometer was used during wear tests under the dry sliding conditions by varying the normal loads and sliding speeds. The sliding distance was constant during tests. The microstructure of the worn surfaces of the tested materials was analysed using the scanning electronic microscope (SEM) and the energy dispersive spectrometry (EDS).

Studies on mechanical property and wear behaviour of AA7075 hybrid composites prepared by a conventional casting method

2021 ◽  
pp. 095440892110349
Author(s):  
V Vignesh Kumar ◽  
K Raja ◽  
T Ramkumar ◽  
M Selvakumar ◽  
TS Senthil Kumar
Keyword(s):  
Boron Nitride ◽  
Boron Carbide ◽  
Hybrid Composites ◽  
Stir Casting ◽  
Wear Behaviour ◽  
Tensile Behaviour ◽  
Wear Properties ◽  
Casting Technique ◽  
Reciprocating Wear ◽  
Sliding Distance

The research article addresses the reciprocating wear behaviour of hybrid AA7075 reinforced with boron carbide and boron nitride through a stir-casting technique. The experiment involved varying wt.% of the secondary particle boron carbide (3, 6 and 9) while boron nitride (3) was kept as constant. The hybrid composites were characterised using scanning electron microscopy coupled with energy dispersive spectroscopy. The hardness and tensile behaviour of the hybrid composites were evaluated. Reciprocating wear behaviour of the hybrid composites were examined using a tribometer by varying the wear parameters such as load and sliding distance. The results revealed that AA7075/6boron carbide/3boron nitride had better hardness, tensile and wear properties. The surface morphology of the wear samples was analysed using SEM.

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.

Effects of Red Mud Reinforcement on Hardness, Wear Behaviour of Cast Al-6Si-0.45 Mg Alloy

2015 ◽  
Vol 787 ◽  
pp. 658-663 ◽  
Author(s):  
B. Geetha ◽  
K. Ganesan
Keyword(s):  
Mechanical Properties ◽  
Wear Rate ◽  
Red Mud ◽  
Tamil Nadu ◽  
Artificial Aging ◽  
Base Alloy ◽  
Solution Treatment ◽  
Stir Casting ◽  
Wear Behaviour ◽  
Casting Technique

An Investigation was carried out to study the effect of red mud reinforcement in Al-6Si-0.45Mg alloy (A356) for improving hardness, wear rate and co-efficient friction. The red mud 53 micron size particles collected from MALCO, Mettur, Tamil Nadu, India, was preheated in a furnace to 500o C and mixed with molten Al-6Si-0.45Mg alloy to make the composite specimens. Al-6Si-0.45Mg alloy-red mud composite specimens were manufactured by stir casting technique using Al-6Si-0.45Mg alloy as matrix and reinforced with 5%, 10%, 15% and 20% volume percentages red mud as the reinforcement. The Al-6Si-0.45Mg alloy–red mud composite specimens were T6 heat treated to improve the mechanical properties. The artificial aging time and aging duration were varied to study their effect on mechanical properties of the composites. Then the specimens hardness, wear rate and coefficient of friction were tested as per ASTM standards. It was found that the hardness increased when the red mud content was increased in the base alloy at all the heat treatment conditions. The peak age timing which gives highest hardness was found to decrease with increased red mud content. The wear rate was decreased when the hardness was increased. The effect of solution treatment and artificial aging on the microstructure was also studied by microscopy.

scholarly journals Mechanical Properties and the Effect of Sliding Distance on Aluminium Composites Material Prepared Using Multiwalled Carbon Nanotubes as Reinforcements

2019 ◽  
Vol 8 (11) ◽  
pp. 2826-2830
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Constant Factor ◽  
Wear Behaviour ◽  
Aluminium Composite ◽  
Multiwalled Carbon ◽  
Casting Technique ◽  
Wear Rates ◽  
Sliding Distance

Interest in multiwalled carbon nanotubes (MWCNTs) as the reinforcements for aluminium composites has gained much importance in the production of latest light weight and high specific strength materials. Various investigations have been conducted to understand the effect of the carbon nanotubes inclusion in the aluminium metal matrix. The present work was intended to enumerate the enhancement in the mechanical properties of the prepared aluminium composite material. The study involves the electroless technique of deposition of the nickel on the surface of the multiwalled carbon nanotubes in 35.58% proportion. Followed by the fabrication of the aluminium composite materials using stir casting technique. The determination of the tensile strength, hardness evaluation and wear studies relating to sliding distance were conducted in detail. The preparation of the composites were done with 0wt%, 2wt%, 4wt% and 6wt% of nickel coated MWCNTs addition, the composites were produced via liquid metallurgy routing. The increase in the strength when the specimen was subjected to the tension test was found upto 23.65% and the brinell hardness number was increased upto 15.38% when compared with ascast aluminium. The effect of variation of the sliding distance and wear mechanism of the fabricated composites were studied by keeping the load and sliding velocity as a constant factor and it was observed that the wear rates increased with the sliding distance. Wear behaviour results for the developed composites have been reported.

scholarly journals Investigation of Unlubricated Sliding Wear Behaviours of In-Situ AlB2/Al Metal Matrix Composite

2011 ◽  
Vol 20 (4) ◽  
pp. 096369351102000 ◽  
Author(s):  
Ferit Ficici ◽  
Sakip Koksal ◽  
Ramazan Kayikci ◽  
Omer Savas
Keyword(s):  
Wear Resistance ◽  
Composite Materials ◽  
Wear Behaviour ◽  
Test Results ◽  
Al Composite ◽  
The Matrix ◽  
Pin On Disk ◽  
Sliding Distance ◽  
Composite Samples

In this study, wear behaviour of AlB2/Al composite materials produced through in-situ method have been experimentally investigated. Four different composite materials that include 5wt.%, 10wt.%, 20wt.% and 30wt.% AlB2 reinforcement phase were tested using pin-on-disk arrangement. The effects of the rate of reinforcement on wear and friction behaviours have been investigated. Wear tests are carried out at 1.83, 3.40 and 4.71 m/s sliding speeds under 10, 20 and 40 N applied loads. The test results show that wear rate increases with the increase in applied load and sliding distance. Increasing the rate of reinforcement phase in the matrix has proportionally increased the wear resistance by 3% to 30%. Hence the greatest wear resistance has been observed with the composite materials having 30wt. % AlB2 reinforcement. Analysis of the worn surfaces of composite samples shows that abrasive and adhesive wear mechanisms are more effective.

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.

Two-body abrasive wear behaviour of AA6061-2SiC-2Gr hybrid nanocomposite fabricated through ultrasonically assisted stir casting

2019 ◽  
Vol 53 (15) ◽  
pp. 2165-2180 ◽  
Author(s):  
A Prasad Reddy ◽  
P Vamsi Krishna ◽  
RN Rao
Keyword(s):  
Wear Rate ◽  
Base Alloy ◽  
Normal Load ◽  
Stir Casting ◽  
Hybrid Nanocomposites ◽  
Wear Behaviour ◽  
Hybrid Nanocomposite ◽  
Pin On Disc ◽  
Aa6061 Aluminium Alloy ◽  
Sliding Distance

Two-body abrasion wear rate of AA6061 aluminium alloy, AA6061-2SiC nanocomposite, and AA6061-2SiC-2Gr hybrid nanocomposites were studied using a pin on disc machine at various applied normal loads 5-20 N and 50-150 µm abrasive grit size by maintaining a constant sliding distance of 120 m. Morphology of fabricated materials, worn surfaces of tested specimens, and abrasive grit papers were analysed under a scanning electron microscope. The wear rate of the AA6061-2SiC-2Gr hybrid nanocomposite was found to be less than that of AA6061 alloy and AA6061-2SiC nanocomposite. The wear rate decreased by 19% for 50 µm, 28.2% for 100 µm, and 22.5% for 150 µm at an applied normal load of 20 N and 120 m sliding distance for Al 6061-2SiC-2Gr hybrid nanocomposite compared to base alloy.

scholarly journals Wear Behaviour of Eutectic Al-Si Alloy-Graphite Composites Fabricated by Combined Modified Two-Stage Stir Casting and Squeeze Casting Methods

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
P. Shanmughasundaram ◽  
R. Subramanian
Keyword(s):  
Wear Resistance ◽  
Wear Test ◽  
Stir Casting ◽  
Constant Load ◽  
Wear Behaviour ◽  
Dry Sliding Wear ◽  
Sliding Velocity ◽  
Weight Percentage ◽  
Pin On Disc ◽  
Graphite Composites

Dry sliding wear behaviour of eutectic Al-Si alloy-graphite composites was investigated employing a pin-on-disc wear test rig. Results revealed that the wear and friction coefficients decreased linearly with increasing weight percentage of graphite particles. Wear resistance of the composite increased considerably with increasing sliding velocity at constant load. In contrast, the friction coefficient of Al-7.5 wt.% Gr composite increased when the sliding velocity was increased from 1 m/s to 2 m/s at 49 N. Worn-out surfaces of wear specimens after the test were examined by scanning electron microscopy to study the morphology of worn surfaces. EDS analysis was carried out to investigate the influence of mechanically mixed layer (MML) which comprises oxides and iron, and this acted as an effective tribolayer in enhancing the wear resistance at higher sliding velocity.

Adhesive Wear Behaviour of Aluminium Alloy / Fly Ash Composites

2012 ◽  
Vol 622-623 ◽  
pp. 1290-1294 ◽  
Author(s):  
Prakash J. Udaya ◽  
T.V. Moorthy
Keyword(s):  
Fly Ash ◽  
Aluminium Alloy ◽  
Adhesive Wear ◽  
Matrix Material ◽  
Research Work ◽  
Wear Behaviour ◽  
Weight Percentage ◽  
Casting Technique ◽  
The Matrix ◽  
Measuring Machine

The aim of this research work is to study the influence of wear parameters on the adhesive wear behaviour of aluminium matrix composites (AMCs). It consists of A413 aluminium alloy as the matrix material and particulate fly ash of 3%, 6% and 9% by weight as the reinforcement material. Stir casting technique was used to fabricate the AMCs. The distribution of the fly ash particles in the matrix phase was investigated using the SEM image. The wear tests have been carried out using a pin on disc machine according to the ASTM G99 – 05 specifications. Wear surfaces were analysed using the images captured through Video measuring machine. It was found that load has the highest influence on wear rate followed by sliding distance, sliding speed, and weight percentage of reinforcement.

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