scholarly journals Multi objective optimization of wear behaviour of Aluminum MMCs using Grey-Taguchi method

2020 ◽  
Vol 7 ◽  
pp. 16
Author(s):  
Poovalingam Muthu
Keyword(s):  
Wear Rate ◽  
Coefficient Of Friction ◽  
Weight Ratio ◽  
Stir Casting ◽  
Sem Analysis ◽  
Wear Behaviour ◽  
Dry Sliding Wear ◽  
Specific Strength ◽  
Pin On Disc ◽  
Grey Relational

In recent years, metal matrix composite (MMCs) have been receiving worldwide attention on account of their superior strength-to-weight ratio and stiffness. Among the several classes of composite materials, Aluminium matrix ceramic reinforcement composites have attracted increasing attention due to their unique properties such as better specific strength, specific stiffness, wear resistance, excellent corrosion resistance, high elastic modulus and light weight. The aim of the present investigation is to optimize the dry sliding wear parameters of Aluminum LM25 matrix reinforced with silicon carbide (SiC) (5 wt.%) and Copper (Cu) (3 wt.%) using Taguchi based grey relational analysis. In this work, the composite is prepared using stir casting method. The specimens are prepared according to ASTM standard. Using pin-on-disc apparatus, wear tests are conducted as per Taguchi's L9 orthogonal array and optimum wear parameters are identified with an objective to minimise the wear rate and coefficient of friction based on the grey relational grade. The effect of parameters on the wear rate and coefficient of friction was determined using Analysis of variance (ANOVA). Finally, the experimental results were verified using confirmation tests and the SEM analysis was carried out to study the wear mechanism.

scholarly journals Fabrication and Modelling of Tribological Performance of Al-Si/12Al2O3/2MoS2 Composite using Taguchi Technique

2021 ◽  
Vol 18 (3) ◽  
pp. 8959-8977
Author(s):  
HARI KIRAN VUDDAGIRI ◽  
Srinivas Vadapalli ◽  
Jaikumar Sagari ◽  
Sivasankara Raju R.
Keyword(s):  
Wear Rate ◽  
Coefficient Of Friction ◽  
Hybrid Composite ◽  
Stir Casting ◽  
Wear Behaviour ◽  
Dry Sliding Wear ◽  
Strength Analysis ◽  
Sliding Velocity ◽  
Specific Strength ◽  
The Coefficient Of Friction

This paper investigates the effect of mechanical, microstructural and dry sliding wear behaviour of Al-Si/2wt%MoS2, Al-Si/12wt%Al2O3, and Al-Si/12wt% Al2O3/2wt%MoS2 composites that prepared using the stir-casting route. To avoid friction and wear at the interfaces of materials, an attempt has been made by adding solid lubricant MoS2 to build such a self-lubricating composite with Al-matrix. The tribological analysis has been described based on the Taguchi orthogonal array (L27). Three variables combination such as sliding velocity, sliding distance and contact pressure are used for this study to determine the tribological responses, i.e. wear rate and coefficient of friction. The properties of composites were improved by increasing the weight % of MoS2 and Al2O3. The tensile strength of Al-Si/2MoS2, Al-Si/12Al2O3, and Al-Si/12 Al2O3/2MoS2 composites is 6.02%, 12.46%, and 2.44% compared to the base matrix. The addition of MoS2 helps the hybrid composite to attain better tribological properties with a slightly lower specific strength. Analysis of variance showed that the composites such as Al-Si/2 MoS2 and Al-Si/12Al2O3/2MoS2 were strongly influenced by the pressure in wear rate. Similarly, sliding velocity affects the coefficient of friction for Al-Si/2MoS2. Wear tracks formed during the dry slide process were analysed using optical and SEM with an EDS. It was discovered that pressure plays a vital effect in the wear mechanism. The hybrid composite (Al-Si/12 Al2O3/2MoS2) material can be utilised in place of conventional materials in tribological demanding automotive applications

scholarly journals Investigation of Wear Behaviour of Al6061 reinforcement with TiC and MoS2

2017 ◽  
Vol 13 (3) ◽  
pp. 32-36
Author(s):  
S. Rajesh ◽  
C. Velmurugan
Keyword(s):  
Wear Resistance ◽  
Volume Fraction ◽  
Wear Behavior ◽  
Aluminum Matrix ◽  
Cost Effective ◽  
Stir Casting ◽  
Wear Behaviour ◽  
Dry Sliding Wear ◽  
Specific Strength ◽  
Main Challenge

Metal matrix composite (MMC) focuses primarily on improved specific strength, high temperature and wear resistance application. Aluminum matrix reinforced with titanium carbide and molybdenum disulfide has good potential and also self-lubrication. The main challenge is to produce this composite in a cost effective way to meet the above requirements. In this study Al–TiC-MoS2 castings with different volume fraction of TiC and MoS2 were produced in an argon atmosphere by an enhanced stir casting method. Hardness of the composite has increased with higher % of TiC addition. At that same time self-lubrication of composite has occur in the effort of MoS2. Dry sliding wear behavior of AMC was analyses with the help of a pin on disc wear and friction monitor. The present analyses reveal the improved hardness  as well as wear resistance.

scholarly journals Tribological analysis of wire additive manufactured Ti6Al4V by Electron Beam source

2021 ◽  
Author(s):  
Manjunath A ◽  
Anandakrishnan V ◽  
Ramachandra S ◽  
Parthiban K ◽  
Sathish S
Keyword(s):  
Electron Beam ◽  
Additive Manufacturing ◽  
Wear Rate ◽  
Complex Geometry ◽  
Weight Ratio ◽  
Wear Test ◽  
Substrate Material ◽  
Wear Behaviour ◽  
Dry Sliding Wear ◽  
Tribological Analysis

Abstract Additive manufacturing through electron beam, is an attractive and fast growing additive manufacturing process for complex geometry in the aerospace, automotive and rapid tooling industry. Ti6Al4V is the material which is widely used in aerospace industry owing to its good strength-to-weight ratio, higher strength and toughness and admirable corrosion resistance. Ti6Al4V samples were realized through wire electron beam additive manufacturing by Pre-positioning the wire and then fusing it to the substrate material. The samples were subjected to standard dry sliding wear test to explore the wear behaviour. The wear analysis exposed the substantial effects of parameters on the wear rate. Likewise, the mechanisms that significantly influenced the wear rate was identified with worn surface and debris analysis.

Physical and Wear Properties of UHMWPE Fabric Reinforced Epoxy Composites

2020 ◽  
Vol 17 (1) ◽  
pp. 7577-7586 ◽  
Author(s):  
P. Rajendra Prasad ◽  
J. N. Prakash ◽  
L. H. Manjunath ◽  
P. Venkateshwar Reddy
Keyword(s):  
Wear Rate ◽  
Sem Analysis ◽  
Epoxy Composites ◽  
Specific Wear Rate ◽  
Synthetic Fiber ◽  
Dry Sliding Wear ◽  
Wear Properties ◽  
Steel Material ◽  
The Matrix ◽  
Pin On Disc

Usage of synthetic fiber reinforced composites has increased rapidly because of their excellent properties such that it acts as a replacement for metals in the recent days. The physical and wear properties of Ultra-High Molecular Weight Polyethylene (UHMWPE) fabric reinforced epoxy composites have been studied in this present work. Using pin-on-disc test rig, dry-sliding wear of test specimens have been tested against disc of EN31 steel material. The plain woven bi-directional 200gsm and 240gsm UHMWPE fabric reinforced epoxy composites were fabricated by hand lay-up method at room temperature. All the tests were conducted as per the Taguchi’s L9 orthogonal-array. The process parameters considered in the present study is load, sliding velocity and sliding time with three levels each. Specific wear rate is considered as the response variable.  Optimization is carried out to find best combination of parameters on specific wear rate.  From the results, it is evident that load has greater influence on specific wear rate than other two considered parameters.  Scanning Electron Microscopy (SEM) analysis was also carried out to examine the matrix distribution over fabric (reinforcement) and also their bonding between reinforcement and matrix.

Multi Objective Optimization of Wear Behaviour of In Situ AA8011-ZrB2 Metal Matrix Composites by Using Taguchi-Grey Analysis

2018 ◽  
Vol 928 ◽  
pp. 162-167 ◽  
Author(s):  
B.M. Muthamizh Selvan ◽  
V. Anandakrishnan ◽  
Muthukannan Duraiselvam ◽  
R. Venkatraman ◽  
S. Sathish
Keyword(s):  
Wear Rate ◽  
Microscopic Analysis ◽  
Casting Process ◽  
Stir Casting ◽  
Wear Behaviour ◽  
Dry Sliding Wear ◽  
Homogeneous Distribution ◽  
Tribological Behaviour ◽  
Electron Microscopic

Composite materials with aluminium alloy 8011 matrix and 0, 4 and 8 weight percentages of ZrB2reinforcements were synthesized by in-situ stir casting process. The presence and homogeneous distribution of the reinforcements were examined with X-ray diffraction analysis and scanning electron microscopic analysis. To investigate the effect of dry sliding wear parameters such as sliding distance, percentage reinforcement, load, sliding velocity and temperature on wear rate and co-efficient of friction, experiments were conducted using a pin on disc wear tester as per Taguchi’s orthogonal array design and the tribological behaviour of synthesized composites was investigated by statistical techniques. Significance and the influence of the parameters over the response were determined by analysis of variances and grey relational analysis was used to find the optimal combination of parameters to obtain minimum wear rate and co-efficient of friction.

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.

Tribological behavior of a newly developed AA2014/waste eggshell/SiC hybrid green metal matrix composite at optimum parameters

2018 ◽  
Vol 7 (1) ◽  
pp. 48-60 ◽  
Author(s):  
Shashi Prakash Dwivedi ◽  
Satpal Sharma ◽  
Raghvendra Kumar Mishra
Keyword(s):  
Wear Rate ◽  
Metal Matrix ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Normal Load ◽  
Stir Casting ◽  
Dry Sliding Wear ◽  
Optimum Parameters ◽  
The Matrix ◽  
Pin On Disc

AbstractThe effect of waste carbonized eggshell and silicon carbide (SiC) wt.% on the dry sliding wear behavior of AA2014 alloy green composites produced by electromagnetic stir casting method was investigated. The percentage of waste carbonized eggshell particles and SiC particles varied from 2.5% to 12.5%. The tribological behavior of AA2014/waste carbonized eggshell/SiC hybrid green metal matrix composites (MMCs) was investigated on a pin-on-disc apparatus. The weight percentages of waste carbonized eggshell and of SiC, normal load, and sliding speed and distance were taken as input process parameters, and wear rate was taken as a response. Response surface methodology was used to plan and analyze the experiment. Minimum wear rate was found to be 8.89×10−5mm3/m with desirability one at optimum parameters of 1.75 m/s (sliding velocity), 6.5 (carbonized eggshell wt.%), 34.24 N (normal load), 1219.63 m (sliding distance), and 11 wt.% (SiC wt.%). In the confirmation experiment, the experimental wear rate of the hybrid green MMC at optimum parameters was found to be 9.5×10−5. Results showed that the experimental wear rate and density of the hybrid green MMC were reduced by about 36.66% and 0.35%, respectively, compared with the matrix.

Influence of Particle Content and Porosity on the Dry Sliding Wear Behaviour of Cast In-Situ Al(Ti)-Al2O3(TiO2) Composites

2005 ◽  
Author(s):  
Abdulhaqq A. Hamid ◽  
Subrata Ray ◽  
Satish C. Jain ◽  
Prakriti K. Ghosh
Keyword(s):  
Wear Rate ◽  
Matrix Alloy ◽  
Wear Testing ◽  
Wear Behaviour ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Particle Content ◽  
In Situ Composites ◽  
Pin On Disc

Cast in-situ Al(Ti)-Al2O3(TiO2) composites, synthesized by dispersing titanium dioxide (TiO2) particles in molten aluminium, which reduces these particles, partially or fully, forming alumina (Al2O3) and releasing titanium to the matrix alloy, may provide materials for lightweight components in automobiles and aircrafts. Wear tests, conducted at different normal loads and at constant sliding velocity of 1.05 m/s using a pin-on-disc wear testing m/c, under dry sliding conditions, indicate that the cumulative volume loss and wear rate of in-situ composites are significantly lower than those observed in either the commercial aluminium or Al-Ti base alloys, under similar load and sliding conditions. At a given particle content, the wear rate increases with increasing porosity content presumably due to its combined effect on real area of contact as well as subsurface cracking. The wear rate of in-situ composites having relatively lower porosity decreases with increasing particle content, but, at relatively higher porosity, decreases a little or remains unchanged with increasing particle content.

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.

Effect of Dry Sliding Wear Behaviour of AA6061/ZrB2/SiC Hybrid Composite

2016 ◽  
Vol 8 (2) ◽  
Author(s):  
S.R. Ruban ◽  
K.L.Dev. Wins ◽  
J.D.R. Selvam ◽  
A.A. Richard
Keyword(s):  
Hybrid Composite ◽  
Sliding Wear ◽  
Normal Load ◽  
Stir Casting ◽  
Wear Behaviour ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Pin On Disc ◽  
Worn Surface ◽  
Sliding Wear Behaviour

This paper investigates the dry sliding wear behaviour of AA6061/ZrB2/SiC hybrid composite prepared by the stir casting. A pin-on-disc wear apparatus was used for this study. The effect of ZrB2 and SiC particulate content and normal load on wear rate was analyzed. The insitu fabricated ZrB2 and the reinforced SiC particles enhance the wear resistance of the AA6061 composite. The worn surface analysis of the composite as a function of ZrB2 and SiC particulate content and normal load are also presented.

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