Optimum Composition of Aluminium Hybrid Composites for Maximum Wear Resistance

2021 ◽  
Vol 319 ◽  
pp. 18-23
Author(s):  
Kumar Prakash ◽  
Nilamber Kumar Singh
Keyword(s):  
Wear Resistance ◽  
Taguchi Method ◽  
Rotational Speed ◽  
Regression Models ◽  
Hybrid Composites ◽  
Stir Casting ◽  
Constant Load ◽  
Quadratic Regression ◽  
Pin On Disc ◽  
Wear Tests

Taguchi method is applied to optimize the compositions of Al-Mg-Ti-Cu-SiC hybrid composites for maximum wear resistance. Wear tests are performed on a pin-on-disc machine under a constant load of 3 kg on specimens of above composites prepared using Taguchi L9 orthogonal array through stir casting route. Each test is conducted for 30 minutes at disc rotational speed of 600 rpm. The contribution of each constituent is evaluated using ANOVA. Linear and quadratic regression models are also developed. The predicted results by these models are very close to the experimental results. It is found that Taguchi method is very successful in the optimization of particulate reinforcements (Mg, Ti, Cu and SiC) in the composites for maximum wear resistance.

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.

The role of ceramic particle loading and the influence of hot extrusion on the tribological behaviour of aluminium alloy-SiCp composites

2020 ◽  
pp. 002199832095740
Author(s):  
S Dhanalakshmi ◽  
K ShanmugaSundaram ◽  
TR Tamilarasan ◽  
R Rajendran
Keyword(s):  
Wear Resistance ◽  
Base Alloy ◽  
Wear Test ◽  
Hot Extrusion ◽  
Stir Casting ◽  
Ceramic Particle ◽  
Constant Load ◽  
Tribological Behaviour ◽  
Wear Performance ◽  
Electron Microscopes

Aluminium matrix composites (AMC) are gaining wide popularity in various sectors due to their excellent properties which are synergic. Apart from strength, wear resistance of a material is also an essential criterion for the number of applications. Extensive studies are being carried out on the secondary processing of these materials to enhance the suitability of the AMC for engineering applications. In this study, initially, Al 2014 base alloy and their composites with 5, 10, and 15 wt.% SiCp fabricated by stir casting route were subjected to wear test. Based on the encouraging wear performance, the Al-10 wt.% SiC composite was further subjected to extrusion. Pin-on-disc sliding wear tests on the as-cast & extruded base alloy and the composite samples were carried out at a constant load of 20 N for a total sliding distance of 1000 m with a velocity of 2 m/s. Microhardness and porosity measurements were carried out besides the study of wear performance, such as coefficient of friction and wear by weight loss. The worn surfaces were analyzed both by optical and scanning electron microscopes. The effect of particle addition, extrusion, porosity, and microhardness on the wear performance of the samples was discussed. Among the samples studied, the Al-10 wt.% SiC composite extruded at a ratio of 8:1 is found to have the highest wear resistance.

scholarly journals Cast Hybrid Composites Designated for Air Compressor Pistons

2016 ◽  
Vol 61 (2) ◽  
pp. 705-708 ◽  
Author(s):  
A. J. Dolata ◽  
M. Dyzia ◽  
L. Jaworska ◽  
P. Putyra
Keyword(s):  
Wear Resistance ◽  
Composite Material ◽  
Phase Composition ◽  
Hybrid Composites ◽  
Selection Criterion ◽  
Stir Casting ◽  
Additional Parameter ◽  
Casting Method ◽  
Air Compressor ◽  
Component Selection

Abstract The main purpose of the investigations was to develop the phase composition of the composite assuming that the component selection criterion will be the formability of piston work surfaces during the machining. Wear resistance under the friction conditions was assumed as the additional parameter for the assessment of composite material. In the study were used AlSi7Mg/SiC+Cg and AlSi7Mg/SiC+GR hybrid composites prepared by the stir casting method.

Abrasive Wear Characteristics of Ni-base Self-fluxing Alloy Spraywelding Overlays

1997 ◽  
Author(s):  
Z. Ding ◽  
R. Knight ◽  
R.W. Smith
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Process Parameters ◽  
High Stress ◽  
Resistance Mechanisms ◽  
Abrasive Wear Resistance ◽  
Abrasive Medium ◽  
Hardness Tests ◽  
Pin On Disc ◽  
Wear Tests

Abstract The results of low stress, pin-on-disc and high stress grinding abrasive wear tests on coatings produced by plasma and oxy-acetylene flame spraywelding are presented. FNil5A and FNiWC35 Ni-based self-fluxing alloys were selected as typical spraywelding materials for abrasive wear resistance. The abrasive wear resistance mechanisms of welded overlays produced by various materials and processes were also characterized by hardness tests, microstructural and compositional analyses, and through analysis of the effect of different kinds of abrasive on the wear resistant of Ni-base self-fluxing spraywelding overlays. Results showed that FNiWC35 overlays exhibited improved resistance under low stress abrasion, but the relative wear resistances of FNiWC35 and FNil5A still depended primarily on the type and hardness of the abrasive medium used. For the same material, the abrasive wear resistance of oxyacetylene flame sprayed overlays was higher than that produced by plasma spraywelding. The wear resistance of the plasma spraywelding overlays depended not only on the material, but also strongly on the spraywelding process parameters.

Burr Minimization in Step Drilling of Al-Fly Ash/Gr Hybrid Composites by Taguchi Method

2012 ◽  
Vol 548 ◽  
pp. 264-270 ◽  
Author(s):  
P. Shanmughasundaram ◽  
R. Subramanian ◽  
M. MahendraBoopathi
Keyword(s):  
Fly Ash ◽  
Taguchi Method ◽  
Hybrid Composites ◽  
Stir Casting ◽  
Influential Factors ◽  
Work Piece ◽  
Machining Parameters ◽  
Step Size ◽  
Burr Height ◽  
Exit Burr

Metal Matrix Composites (MMCs) have emerged as a potential material especially for automotive and aerospace industries. In view of the growing engineering applications of these composites, the machining parameters have to be optimized in order to attain good surface quality, reduced tool wear and cutting forces. In this paper, the influences of the feed and step drill’s geometries such as step angle and step size on the exit burr height have been investigated for burr minimization in drilling of MMCs. Experimental study was conducted for Al-15wt.% fly ash composites and Al-15wt.% fly ash /1.5wt.% graphite hybrid composites which are fabricated through stir casting method. Optimum drilling parameters were identified for burr minimization by the application of Taguchi method, analysis of variance (ANOVA) and the results were validated by confirmation test. Results revealed that feed and step drill’s geometries step angle and step size were the most influential factors on the formation of burr. Dynamom¬eter was employed to measure the thrust that was being applied to the work piece when it was drilled. The inclusion of graphite as supplementary reinforcement in Al / fly ash reinforced composite reduces the thrust force and exit burr height considerably.

Evaluation of Wear Resistance of Ti Alloys Used for Elements Friction of Knee Endoprosthesis

2014 ◽  
Vol 225 ◽  
pp. 123-130
Author(s):  
Beata Majkowska ◽  
Magadalena Jażdżewska ◽  
Damian Miotke ◽  
Emilia Wołowiec ◽  
Andrzej Zieliński
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Titanium Alloys ◽  
Rotational Speed ◽  
Constant Load ◽  
Test Duration ◽  
Ringer’S Solution ◽  
Ti Alloys ◽  
New Generation ◽  
Knee Endoprosthesis

The paper presents research results of resistance to abrasive wear of titanium alloys: Ti6Al4V (commonly used) and Til3Nb13Zr (alloy of new generation) in association with polyethylene (UHMW-PE) predisposed for elements on pair of the knee endoprosthesis. The results were analysed from the point of possibility of an use of new generation titanium alloys as components of such implants. The tests of resistance to abrasive wear of selected kinematic pairs were conducted with the PT-3 tribometer in Ringer’s solution a constant load 2.0 kN, rotational speed of the rotating specimens (Ti13Nb13Zr and Ti6Al4V) 30 rev/min, and test duration 1 or 2 hrs.

scholarly journals Investigation on Mechanical and Wear Behaviors of LM6 Aluminium Alloy-Based Hybrid Metal Matrix Composites Using Stir Casting Process

2022 ◽  
Vol 2022 ◽  
pp. 1-10
Author(s):  
P. Gnaneswaran ◽  
V. Hariharan ◽  
Samson Jerold Samuel Chelladurai ◽  
G. Rajeshkumar ◽  
S. Gnanasekaran ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Steel Fiber ◽  
Hybrid Composites ◽  
Casting Process ◽  
Stir Casting ◽  
Image Analyzer ◽  
Matrix Composites ◽  
Silicon Based ◽  
Boron Carbide B4c

In this investigation, aluminium-silicon-based alloy (LM6) with the addition of (0, 2.5, 5, and 10%) copper-coated short steel fiber and 5% boron carbide (B4C) element-strengthened composites was fabricated by the stir casting method. Mechanical properties and tribological behaviors of LM6-based hybrid composites were investigated, and microstructures of different castings were examined by an image analyzer. The test was conducted at different loads (10, 20, 30, and 40 N) and different sliding spaces (500, 1000, 1500, and 2000 m), respectively. The results revealed that the sample loaded with 10% of reinforcement recorded the highest tensile strength of 231 MPa. On the other hand, the hardness value increased from 71 to 144 BHN, when 15% of reinforcement was added to the sample. It was also noted that 10% copper-coated steel fiber improved wear resistance up to 50% when compared to LM6. A field emission scanning electron microscope was employed to observe the morphology of the worn surfaces of composites at different sliding distances and load conditions. The hybrid composite revealed that the combination of both short steel fibers and reinforcement of ceramic particles enhanced the mechanical properties, obtaining superior wear resistance.

scholarly journals Optimization of Wear Behavior of Al 5456 Alloy/TiB2 Composite using ANOVA and TAGUCHI Method

2019 ◽  
Vol 8 (2S11) ◽  
pp. 3110-3113
Keyword(s):  
Wear Rate ◽  
Taguchi Method ◽  
Software Package ◽  
Wear Behavior ◽  
Stir Casting ◽  
Sliding Velocity ◽  
Weight Percentage ◽  
Casting Technique ◽  
Pin On Disc ◽  
Composite Samples

In this present study, wear behavior of Al 5456 Alloy reinforced with 0,3 and 6 wt %TiB2 were investigated by ANOVA and Taguchi’s (L9 ) method. The composite samples were prepared by stir casting technique. Wear experiment was carried out by pin on disc apparatus under the different parameters of loads (10N, 20N and 30N), sliding velocity (2,4 and 6m/s) and time (10,15 and 20 min).This paper revealed that addition of Titanium diboride (TiB2 ) improves the wear resistance of Al5456 composite. The result showed that wear rate was decreased with increasing the weight percentage of TiB2 . ANOVA and Taguchi method results were tabulated in MINITAB-18 Software package to analyze the influence of individual parameters on the wear rate. Additionally, regression equation was also found the relation between input parameters and wear rate

scholarly journals Investigation of Mechanical and Wear Properties of LM24/Silicate/Fly Ash Hybrid Composite Using Vortex Technique

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
B. R. Senthil Kumar ◽  
M. Thiagarajan ◽  
K. Chandrasekaran
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Fly Ash ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
Wear Properties ◽  
Alloy Matrix ◽  
Pin On Disc ◽  
Wear Reduction

This work has investigated to find the influence of silicate on the wear behavior of LM 24/4 wt.% fly ash hybrid composite. The investigation reveals the effectiveness of incorporation of silicate in the composite for gaining wear reduction. Silicate particles with fly ash materials were incorporated into aluminum alloy matrix to accomplish reduction in wear resistance and improve the mechanical properties. The LM24/silicate/fly ash hybrid composite was prepared with 4 wt.% fly ash particles with 4, 8, 12, 16, 20, and 24 wt.% of silicate using vortex technique. Tribological properties were evaluated under different load (15, 30, 45, 60, and 75 N); sliding velocity (0.75, 1.5, 2.25, and 3 m/sec) condition using pin on disc apparatus and mechanical properties like density, hardness, impact strength, and tensile strength of composites were investigated. In addition, the machining of the aluminum hybrid composite was studied using Taguchi L9orthogonal array with analysis of variance. The properties of the hybrid composites containing 24 wt.% silicates exhibit the superior wear resistance and mechanical properties.

Impact of solid self-lubricant and hard ceramic reinforcements on tribological characteristics of microwave-sintered Cu hybrid composites processed by solid-state mixing technique

2016 ◽  
Vol 231 (5) ◽  
pp. 523-542 ◽  
Author(s):  
S Sundararajan ◽  
J Selwin Rajadurai ◽  
C Antony VasanthaKumar
Keyword(s):  
Wear Resistance ◽  
Solid State ◽  
Sliding Friction ◽  
Hybrid Composites ◽  
Microwave Sintering ◽  
Wear Loss ◽  
Weight Percentage ◽  
Mechanical And Tribological Properties ◽  
Pin On Disc ◽  
State Mixing

In this experimental investigation, new sequence of Cu-X wt% SiC (X = 0, 5, 10, and 15) -Y wt% Gr (Y = 5 and 10) metal matrix hybrid composites was effectively manufactured by solid-state mixing (powder metallurgy) technique through a novel microwave sintering process. The influence of hard ceramic reinforcement SiC content and soft self-lubricating reinforcement Gr content on the mechanical and tribological properties of copper hybrid composites was analysed. Using the pin-on-disc tribometer the results of the wear resistance and sliding friction properties of all produced microwave-sintered composites were assessed. Weight percentages of SiC, applied load, sliding distance, and sliding speed are the testing parameters considered for tribological characterization. During dry sliding, the loss in mass was recorded as wear loss. It was observed that with an increase in the SiC weight percentage, the wear resistance enhanced monotonically with hardness. The microwave-sintered cylindrical composites have been characterized by X-ray diffraction. Optical microstructural studies confirmed the distribution of both the reinforcements was homogeneous on the base matrix copper. The tribological performance of the hybrid composite containing 10 wt% graphite and 15 wt% SiC showed better to that of the other manufactured composites. The kind of wear mechanisms was recognized through morphology of the worn-out surfaces and the wear debris by scanning electron microscope. This experimental analysis revealed that the hybridization of both hard reinforcement like SiC and soft reinforcement like Gr get better wear resistance of copper composites considerably through microwave sintering processes.

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