scholarly journals Effect of Nano B4C on the Tribological Behaviour of Magnesium Alloy Prepared Through Powder Metallurgy

2020 ◽  
Vol 26 (4) ◽  
pp. 392-400
Author(s):  
Sankar CHINTHAMANI ◽  
Gangatharan KANNAN ◽  
Glan Devadhas GEORGE ◽  
Christopher Ezhil Singh SREEDHARAN ◽  
Krishna Sharma RAJAGOPAL
Keyword(s):  
Powder Metallurgy ◽  
Magnesium Alloy ◽  
Wear Test ◽  
Hardness Test ◽  
High Energy ◽  
Dry Sliding Wear ◽  
Tribological Behaviour ◽  
Ball Mills ◽  
Pin On Disc ◽  
B4c Particles

In this present study, the particle size of as received magnesium alloy (AZ91) and B4C powders was reduced through high energy ball mills. The combination of AZ91 (both 10 µm and 60 µm) reinforced with nano B4C particles were fabricated by powder metallurgy technique. The incorporation of nano B4C particles to the Mg matrix was done at various weight % such as 5, 10, 15 and 20. The AZ91 composites were fabricated in a suitable die set assembly and the green compacts were sintered in an electric muffle furnace at 500 °C with argon atmosphere for a dwell time of 1 h. The density of the composites was estimated using Archimedes principle. Micro hardness test was carried out for the prepared specimens and dry sliding wear test was conducted by using pin-on-disc apparatus at room temperature with varying loads and sliding velocities by keeping a constant Sliding Distance (SD). Among the various specimens, the composite with 10 µm size attained a higher Vickers hardness value as well as better wear resistant property. Worn surface analysis of the prepared composites was studied using Scanning Electron Microscope (SEM).

Effect of particle size on mechanical properties and tribological behaviour of aluminium/fly ash composites

2012 ◽  
Vol 19 (3) ◽  
pp. 247-253 ◽  
Author(s):  
Krishnan Ravi Kumar ◽  
Kothavady Mylsamy Mohanasundaram ◽  
Ganesan Arumaikkannu ◽  
Ramanathan Subramanian
Keyword(s):  
Tensile Strength ◽  
Wear Resistance ◽  
Fly Ash ◽  
Ultimate Tensile Strength ◽  
Coefficient Of Friction ◽  
Fine Particles ◽  
Dry Sliding Wear ◽  
Tribological Behaviour ◽  
Weight Percentage ◽  
Pin On Disc

AbstractIn the present study, aluminium alloy (A380) composites containing 3, 6, 9 and 12 weight percentage of fly ash particles were fabricated by liquid metallurgy technique. Three different size ranges of fly ash particles (50–75 μm, 75–103 μm and 103–150 μm) were used. The composites were evaluated for hardness, tensile strength, density, dry sliding wear and frictional behaviour. Pin-on disc apparatus was used to conduct wear tests at loads of 20, 30 and 40 N at a sliding speed of 3 m/s for a constant period of 10 min. Results showed that hardness, ultimate tensile strength, wear resistance and coefficient of friction were superior in composites reinforced with coarse fly ash particles (103–150 μm) compared to composites with fine particles. The hardness, ultimate tensile strength and wear resistance increased, whereas the coefficient of friction and density decreased with the increase in weight percentage of fly ash. Wear resistance and coefficient of friction decreased with increase in applied load. Scanning electron microscope investigations of worn-out samples were carried out to study the progress of wear.

Influence of Porosity and Alloy addition on the Wear behaviour of a Sinter-Forged C45 Steel using Taguchi Method

2020 ◽  
Author(s):  
NAVEEN EASWARAN ◽  
Shanmugam Ramasamy ◽  
Roshan Nagarajan ◽  
Ramanan Nandagopal ◽  
Sripada Ragavendra Keshava Narasimha
Keyword(s):  
Wear Resistance ◽  
Mass Loss ◽  
Wear Test ◽  
Theoretical Density ◽  
Wear Behaviour ◽  
Dry Sliding Wear ◽  
Input Parameters ◽  
Alloy Addition ◽  
Pin On Disc ◽  
Alloy Steels

Elemental powders of Atomized Iron (Fe), Carbon (C) and Molybdenum (Mo) were weighed and mixed in a pot mill to yield the composition of C45, C45-1%Mo and C45-2%Mo Steels, then compacted and sintered. The Sintered preforms had a density- 75% of the Theoretical Density. Then the Sintered preforms were subjected to densification to get two densities- 80% and 85% of the theoretical density through Forging. The sintered and densified preforms of alloy steels were subsequently machined to get the required wear test specimens.The experiments were conducted on a Pin-on-disc Tribometer, conforming to ASTM G99 standards, on a rotating EN32 disc. Using Minitab 16 software, the Dry Sliding wear experiments were planned using L27 Orthogonal Array.The % Theoretical Density of the Specimens (1-%Porosity), % Mo Addition, Load and Sliding Velocity were taken as input parameters, mass loss was the output parameter. It was observed that the increasing density of alloy steels adversely affects the wear resistance of the alloy steels and mass loss is increased. It was found that the addition of Mo significantly improves the wear resistance of the alloy steels irrespective of the densities .Empirical correlations for mass loss with respect to input parameters had been developed.

scholarly journals Wear Behavior of Aluminium Metal Matrix Composite Prepared from Industrial Waste

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
L. Francis Xavier ◽  
Paramasivam Suresh
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Industrial Waste ◽  
Wear Behavior ◽  
Wear Test ◽  
Dust Particles ◽  
Dry Sliding Wear ◽  
Pin On Disc ◽  
Aluminium Metal

With an increase in the population and industrialization, a lot of valuable natural resources are depleted to prepare and manufacture products. However industrialization on the other hand has waste disposal issues, causing dust and environmental pollution. In this work, Aluminium Metal Matrix Composite is prepared by reinforcing 10 wt% and 20 wt% of wet grinder stone dust particles an industrial waste obtained during processing of quarry rocks which are available in nature. In the composite materials design wear is a very important criterion requiring consideration which ensures the materials reliability in applications where they come in contact with the environment and other surfaces. Dry sliding wear test was carried out using pin-on-disc apparatus on the prepared composites. The results reveal that increasing the reinforcement content from 10 wt% to 20 wt% increases the resistance to wear rate.

scholarly journals Development of Fe-5Al-1C alloys for grinding ball

2021 ◽  
Vol 1 (12 (109)) ◽  
pp. 29-35
Author(s):  
Ratna Kartikasari ◽  
Adi Subardi ◽  
Andy Erwin Wijaya
Keyword(s):  
Corrosion Resistance ◽  
Wear Test ◽  
Alloy System ◽  
Cell Polarization ◽  
Dry Sliding Wear ◽  
Fracture Elongation ◽  
System A ◽  
Electrode Cell ◽  
Pin On Disc ◽  
Mn Content

Our object of research is to combine the properties of Mn and the advantages of Fe-Al-C to improve the performance of grinding ball materials. Three Fe-5Al-1C alloys with compositions of 15 wt% Mn (FAM15), 20 wt% Mn (FAM20), and 25 wt% Mn (FAM25) were investigated. Argon gas was used to assist the removal of dissolved oxygen and to control the formation of metal oxides during Fe-Al-Mn-C (FAMC) fabrication. Microstructure analysis was conducted using scanning electron microscopy, and the Vickers microhardness tester was used to evaluate hardness. To guarantee the Fe-5Al-1C-Mn alloy phase, X-ray diffraction (XRD) test was performed. The EDS test was carried out to show the composition at different points and to observe the presence of several phases in the FAMC alloy system. A pin-on-disc method was employed for a dry sliding wear test, and corrosion testing was performed using the three-electrode cell polarization method. With the addition of Mn, the Vickers hardness of the FAMC alloy raised from 194.4 VHN at 15 wt% to 265 VHN at 25 wt%. The tensile strength and fracture elongation values were 424.69 MPa, 27.16 % EI; 434.72 MPa, 33.6 % EI; and 485.71 MPa, 38.48 % EI for FAM15, FAM20, and FAM25, respectively. A crucial factor for increasing the performance of grinding ball is the wear mechanism. The wear rate results for FAM25 show a decline of more than 57 % compared to FAM15 due to an increase in the hard intermetallic area. The addition of Mn elements increased the corrosion resistance of the FAMC alloys; the lowest corrosion rate occurred at 25 wt% Mn content at up to 0.036 mm/yr. According to the experimental results, the FAM25 alloys have the highest mechanical and corrosion resistance of the three types of alloys. The FAMC alloy is a promising candidate for application as a material for grinding balls by optimizing the Mn content

Wear Mitigation in Magnesium Alloy AZ80 Processed by Equal Channel Angular Pressing

2011 ◽  
Vol 6 ◽  
pp. 1-11 ◽  
Author(s):  
Yasser Fouad ◽  
Khaled M. Ibrahim ◽  
Brando Okolo
Keyword(s):  
Wear Resistance ◽  
Magnesium Alloy ◽  
Equal Channel Angular Pressing ◽  
Wear Behavior ◽  
Wear Test ◽  
Aging Treatment ◽  
Angular Pressing ◽  
Pin On Disc ◽  
Set Up ◽  
Az80 Alloy

First results of the influence of Equal Channel Angular Pressing (ECAP) on the wear behavior of the magnesium alloy AZ80 have been discussed. The evident grain refinement and redistribution of second phases in the 4 pass processed materials resulted in an increase of the hardness state in the AZ80 alloy. Wear tests conducted on a pin-on-disc set-up revealed better wear resistance for the 4 pass processed materials. Isothermal aging treatment, at 210°C for 10 hrs, of the ECAP processed materials showed that wear resistance properties are improved markedly. For incremental sliding speeds during the wear test, wear rate of the AZ80 alloy was found to increase.

Investigation of carbon–carbon composite brake pads in wet and dry sliding wear conditions

2014 ◽  
Vol 66 (6) ◽  
pp. 645-652 ◽  
Author(s):  
Ugur Ozsarac ◽  
Salim Aslanlar ◽  
Faruk Varol ◽  
Mehmet Ekici
Keyword(s):  
Sliding Friction ◽  
Wear Test ◽  
Absorption Capacity ◽  
Rain Water ◽  
Wear Testing ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Content Type ◽  
Brake Pads ◽  
Pin On Disc

Purpose – The purpose of this study was to investigate wear behaviours of brake pads produced from carbon–carbon (C/C) composites in both wet and dry friction sliding conditions. Carbon is probably the most remarkable element in science and also C/C composites are a family of advanced composite materials. They are the most advanced form of carbon and consist of fibre based on carbon precursors embedded in a carbon matrix. In the present work, wear test specimens were prepared according to the related standards and they were exposed to pin-on-disc wear testing in wet and dry sliding conditions with different loads as 10, 20, 30 and 40 N with 1 m/s constant sliding speed. Wet friction process was conducted on all specimens by means of rain water collected from the nature. Design/methodology/approach – Pin-on-disc wear test tribology lubrication was used. Findings – Mechanical and physical property measurements of C/C composite brake pad materials: hardness, modulus of elasticity, density and water absorption capacity. Wear performance of materials were measured as coefficient of friction, volumetric loss and specific wear rate. Originality/value – C/C composite brake pads are used in railway vehicles. Wear performances of them are very important for safety. In this study, wear behaviours of these materials were investigated not only in dry sliding friction condition but also in wet sliding one. Because safety braking is important in all weather conditions for trains, and we used natural rain water to observe the wet sliding friction behaviour of brake pads. “Water lubrication” is an important aspect mentioned in tribology handbooks.

Effect of Reinforcement and Chills on the Tribological Behaviour of Al-12% Si/B4C Composite

2008 ◽  
Author(s):  
G. R. Bharath Sai Kumar ◽  
S. Gopal Prakash
Keyword(s):  
Wear Behavior ◽  
Wear Test ◽  
Dry Sliding ◽  
Test Rig ◽  
Tribological Behaviour ◽  
The Matrix ◽  
B4c Particles ◽  
Pin On Disk ◽  
Boron Carbide B4c ◽  
Test Result

Effect of reinforcement on the wear behavior of Aluminium-12%Si(LM6) reinforced with Boron Carbide (B4C) particles (quantity from 3 to 12 wt% in steps of 3 wt%; size 40–80μm) was investigated by a computerized pin-on-disk wear test rig under dry sliding conditions. Mild steel chill was used. Castings were prepared using dry sand moulds and the reinforcement particles were introduced into the matrix using Vortex-Route Method. Test result showed that this MMC was greatly influenced by the reinforcement and chill. It was found that 9 wt% of B4C particles in Aluminium-12%Si (LM6) alloy exhibited the least wear rate. An attempt to evaluate the tribological properties of this MMC with respect to reinforcement, chill and microstructure is made.

scholarly journals Experimental Study on Tribological Characteristics of AA 6061 Alloy Reinforced with Al2O3 and B4C Particles

2018 ◽  
Vol 24 (6) ◽  
pp. 1
Author(s):  
Khansa Daood AlShamari ◽  
Ihsan Kadhom AlNaimi ◽  
Raad Hameed Majid
Keyword(s):  
Hardness Test ◽  
Ceramic Materials ◽  
Stir Casting ◽  
Casting Method ◽  
Specific Strength ◽  
High Specific Strength ◽  
Pin On Disc ◽  
B4c Particles ◽  
Automotive Parts ◽  
Marine Applications

Two different composite materials were prepared by stir casting method of AA 6061 alloy as a matrix reinforced with two addition different ceramic materials Al2O3 and B4C of grain size   20 µm by 2.5, 5, 7.5 and10% in weight. The composite material with aluminum alloy as a matrix possesses a unique mechanical properties such as: high specific strength and hardness, low density, and high resistance to corrosion and friction wear. This composite is widely used in automotive parts space and marine applications. Pin-on-disc technique was used to calculate the wear rate for each addition of Al2O3 and B4C particles. Rockwell hardness test and optical micrographs examinations were carried out to analyze, compare, and evaluate the addition of reinforced particles. The results of this investigation appeared that the 7.5% of ceramic particles addition give highest values of the hardness and wear resistance.      

Wear Characteristics of Hybrid Al 6063 Matrix Composites Reinforced with Graphite and Fly Ash Particulates

2016 ◽  
Vol 854 ◽  
pp. 1-9 ◽  
Author(s):  
M. Manojkumar ◽  
R. Shanmuga Prakash
Keyword(s):  
Fly Ash ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Wear Test ◽  
Cylinder Liner ◽  
Stir Casting ◽  
Dry Sliding Wear ◽  
Matrix Composites ◽  
Liner Material ◽  
Pin On Disc

As auto manufacturers strive to meet imposed fuel economy and emissions regulations while producing vehicles with the quality and features that consumer expect, the industry needs to rely on advancements made in the field of metal matrix composites. The efforts of combining or replacing metals with the use of advanced metal matrix composites (MMCs) not only reduce weight, but can also improve safety, reliability and efficiency. A hybrid MMC was developed for the cylinder liner of advanced diesel engines. Composites of Al-6063 aluminium alloy reinforced with, fly ash particulate containing 10% and graphite particulate containing 5, 10 and 15 % were produced by stir casting. The wear and frictional properties of the casted hybrid metal matrix composites were investigated by performing dry sliding wear test using a pin-on-disc wear tester. The investigation was done 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. From the investigation, it is evident that wear resistance of Al-6063 is increased while adding the fly ash and graphite reinforcement content. The results were compared with the existing liner material. From this comparative study the Al-6063/fly ash/graphite hybrid metal matrix composite can be the considered as an alternative material for existing cylinder material.

Effect of Hybridizing and Optimization of TiC on the Tribological Behavior of Mg–MoS2 Composites

2017 ◽  
Vol 139 (5) ◽  
Author(s):  
P. Narayanasamy ◽  
N. Selvakumar
Keyword(s):  
Hybrid Composites ◽  
Optimization Technique ◽  
Testing Machine ◽  
Wear Test ◽  
Hardness Test ◽  
Wear Testing ◽  
Dry Sliding Wear ◽  
Wear Property ◽  
Magnesium Matrix ◽  
Pin On Disk

In the present study, the effects of TiC content on the microstructure, hardness, and wear property are to be investigated. Magnesium matrix hybrid composites reinforced with varying wt.% of TiC (0, 5, 10, 15, and 20) and a fixed wt.% of MoS2 (7.5) were produced by powder metallurgy. The microstructure of the hybrid composite samples was analyzed using optical microscopy. Elemental composition of sintered specimens was determined by energy dispersive X-ray spectroscopy (EDS) analysis. The Vicker's hardness test was performed in different locations on the sintered specimen surface with a load of 5 g and 15 s dwell time. The dry sliding wear test was carried out in a pin-on-disk wear testing machine at various load (5–30 N), velocity (0.5–3 m/s), and sliding distance (500–3000 m). Tribological investigation was statistically analyzed using Taguchi L27 orthogonal array with four factors at three levels. A graphical and numerical optimization technique was used to find the optimum value of TiC content using the predicted value of the responses. The tribological properties of the fabricated composites improved significantly compared to that of the magnesium matrix due to the combined effect obtainable by both reinforcements.

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