Effect of Rolling on Microstructure and Wear Behavior of Hot Rolled Al6061-Beryl Composites

2012 ◽  
Vol 463-464 ◽  
pp. 444-448 ◽  
Author(s):  
H.N. Reddappa ◽  
K.R. Suresh ◽  
H.B. Niranjan ◽  
K.G. Satyanarayana
Keyword(s):  
Wear Behavior ◽  
Stir Casting ◽  
Matrix Composites ◽  
Casting Technique ◽  
Wear Rates ◽  
Optical Microstructure ◽  
Cast Composites ◽  
The Matrix ◽  
Hot Rolled ◽  
Sliding Distance

The present paper deals with the study of microstructure and wear characteristics of hot rolled beryl reinforced aluminium metal matrix composites (AMMCs). Al6061-beryl composites with 2, 6 and 10% of beryl were made using stir casting technique. The optical microstructure reveals the homogeneous dispersion of beryl particles in the matrix. The worn surfaces have been observed under SEM to understand the mechanism of wear. Hot rolled composites at 4500C possess higher hardness and lower specific wear rates under all loads and sliding distance studied in this investigation, when compared with cast composites.

Mechanical properties and fracture mechanism of ZA-27/TiO2 particulate metal matrix composites

2003 ◽  
Vol 217 (3) ◽  
pp. 201-206 ◽  
Author(s):  
K H W Seah ◽  
S C Sharma ◽  
M Krishna
Keyword(s):  
Mechanical Properties ◽  
Titanium Dioxide ◽  
Fracture Mechanism ◽  
Matrix Alloy ◽  
Stir Casting ◽  
Primary Objective ◽  
Matrix Composites ◽  
Casting Technique ◽  
Titanium Dioxide Particle ◽  
The Matrix

The mechanical properties and the fracture mechanism of composites consisting of ZA-27 alloy reinforced with titanium dioxide particles were investigated with the primary objective of understanding the influence of the particulate reinforcement on the mechanical behaviour of the ZA-27 alloy. The titanium dioxide particle content in the composites ranged from 0 to 6 per cent, in steps of 2 wt %. The composites were fabricated by the stir casting technique in which the reinforcement particles were dispersed in the vortex created in the molten matrix alloy. The study revealed improvements in Young's modulus, ultimate tensile strength (UTS), compressive strength, yield strength and hardness of the composites as the titanium dioxide content was increased, but at the expense of ductility and impact strength. The fracture behaviour of the composite was also significantly influenced by the presence of titanium dioxide particles. Eventual fracture was a result of crack propagation through the matrix as well as through the reinforcing particles. Scanning electron microscopy and fractography analyses were carried out to provide suitable explanations for the observed phenomena.

Optimization of Drilling Process on Al-SiC Composite Using Grey Relation Analysis

2017 ◽  
pp. 392-406
Author(s):  
K. Vinoth Babu ◽  
M. Uthayakumar ◽  
J. T. Winowlin Jappes ◽  
T. P. D. Rajan
Keyword(s):  
Volume Fraction ◽  
Cutting Speed ◽  
Microscopy Study ◽  
Stir Casting ◽  
Experimental Result ◽  
Drilling Process ◽  
Machining Parameters ◽  
Matrix Composites ◽  
Casting Technique ◽  
The Matrix

This study reveals the multi objective optimization of machining parameters in drilling of SiC reinforced with aluminium metal matrix composites through grey relational analysis. The composite is prepared with varying volume fraction of the reinforcement by liquid metal stir casting technique. Uniform distribution of SiC particle in the matrix is witnessed through microscopy study and observed that the hardness and strength on different composite. The drilling experiments were performed with coated carbide tool with different point angle such as 90o, 120o and 140o. Cutting speed, feed, point angle and volume fraction are considered as input parameters and the performance characteristics such as surface roughness and thrust force are observed as output response in this study. The significant contributions of these factors are determined using Analysis of Variance (ANOVA). The optimized process parameters have been validated by the confirmation test. The experimental result shows that point angle influences more on output performance followed by feed and cutting speed.

Pin Temperature and Al2O3 Fillings Effect on Sliding Wear Characteristics of Al–25Zn/Al2O3 Composites

2021 ◽  
pp. 135065012110251
Author(s):  
Parmeshwar P Ritapure ◽  
Yashwant R Kharde ◽  
Rashmi G Yadav ◽  
Suyash Y Pawar ◽  
Bharat D Aldar
Keyword(s):  
Material Removal ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Matrix Alloy ◽  
Stir Casting ◽  
Good Precision ◽  
Wear Properties ◽  
Casting Technique ◽  
Mechanical And Tribological Properties ◽  
The Matrix

This investigation studied the effect of Al2O3 reinforcement on sliding wear (dry) characteristics of Al–25Zn/Al2O3 composites at various temperatures, speeds, and loads applied for 1400 m sliding distances as per the Taguchi L16 orthogonal array using a tribometer with an Emergency Number24 shaft steel disk. Al–25Zn alloy-based composites reinforced with 10, 15, and 20 wt% of Al2O3 particles were fabricated by the stir casting technique. The results show a significant alteration in mechanical and tribological properties with reinforcement of Al2O3 content. The optimum mechanical and sliding wear properties are seen for the composite with 10 wt% of Al2O3. The material removal in the matrix alloy is due to adhesion and in composites mainly due to abrasion and delamination. The developed regression model and the artificial neural network model can forecast the composite's wear behavior with good precision.

Analysis on sliding wear behavior of Al + B4C+ mica hybrid metal matrix composites

2020 ◽  
Vol 10 (7) ◽  
pp. 986-997
Author(s):  
K. Velavan ◽  
K. Palanikumar
Keyword(s):  
Boron Carbide ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Stir Casting ◽  
Dry Sliding Wear ◽  
Wear Loss ◽  
Matrix Composites ◽  
Casting Technique

In this investigation, wear behavior of hybrid aluminum metal matrix composites (HMMCs) fabricated by stir casting technique is carried out. Boron carbide and Mica particles are added. The Mica percentage varies from 3–5% in steps of 1% with a constant reinforcement quantity of 10% boron carbide. The dry sliding wear experiments are explored on a pin on disc tribometer. The process variables considered for the study are: Mica mass fraction, sliding speed, load and sliding time, and the response analyzed is wear loss. Box-Behnken design is used for conducting the experiments. The result shown proves that 3% of Mica particle inclusion reduces the wear due to the increase in density. Further increase of mica does not improve the wear resistance. ANOVA results indicate that load and % of Mica are the profoundly influencing parameters. The pin surface is analyzed by using a Scanning Electron Microscope.

Influence of fly ash particles on tensile and impact behaviour of aluminium (Al/3Cu/8.5Si) metal matrix composites

2014 ◽  
Vol 21 (2) ◽  
pp. 181-189 ◽  
Author(s):  
Krishnan Ravi Kumar ◽  
Kothavady Mylsamy Mohanasundaram ◽  
Ramanathan Subramanian ◽  
Balasubramaniam Anandavel
Keyword(s):  
Fly Ash ◽  
Ductile Failure ◽  
Stir Casting ◽  
Aluminium Matrix ◽  
Matrix Composites ◽  
Particle Content ◽  
Impact Behaviour ◽  
Casting Technique ◽  
Unreinforced Material ◽  
The Matrix

AbstractThe present work aimed to study the tensile and impact behaviour of fly ash particle reinforced aluminium matrix composites. Fly ash particles reinforced aluminium (Al/3Cu/8.5Si) matrix composites were fabricated by the stir casting technique. Three different size ranges of fly ash particles (50–75, 75–103 and 103–150 μm) were used. The composites were subjected to tensile and impact tests. The tensile and impact fracture surfaces of the aluminium alloy and composites were investigated using a scanning electron microscope to characterise the fracture mechanism of the composites. The tensile strength of composites increased, while the ductility and impact strength of composites decreased with an increase in fly ash particle content. The fracture surface of the unreinforced material was characterised by uneven distribution of a large number of dimples resulting in ductile failure. In the case of composites, the presence of hard and brittle reinforcement particles in the ductile aluminium matrix places constraints on the plastic flow of the matrix leading to brittle failure with an increase in fly ash particles.

scholarly journals Evaluation of Mechanical and Microstructural Properties of Al-SiC/Gr Particulate Produced by Stir Casting Technique

2021 ◽  
pp. 18-24
Author(s):  
L. O. Mudashiru ◽  
I. A. Babatunde ◽  
S. O. Adetola ◽  
O. I. Kolapo
Keyword(s):  
Mechanical Properties ◽  
Pure Aluminum ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Casting Technique ◽  
Cast Composites ◽  
Mechanical And Microstructural Properties ◽  
Economical Process

Stir casting is an economical process for the production of aluminum matrix composites. There are many parameters in this process, which affect the final microstructure and mechanical properties of the composites. In this study, micron-sized SiC and Gr particles were used as reinforcement to fabricate Al-SiC/Gr composites at holding temperature of 700 ± 5 °C for 5 min at 350 rev/min stirring speed. The evaluation of the mechanical properties of the composites show improvement compared with pure aluminum-matrix. The Scanning Electron Microscope (SEM) of the as-cast composites shows that the vortex formations within the melt eliminates the agglomeration of the particles and improve the wettability phenomenon.

scholarly journals Tribological Behavior of AA7050-ZrSiO4 Composites Synthesized by Stir Casting Technique

2019 ◽  
Vol 23 (1) ◽  
pp. 198-201 ◽  
Author(s):  
S. Sakthivelu ◽  
M. Meignanamoorthy ◽  
M. Ravichandran ◽  
P. P. Sethusundaram
Keyword(s):  
Tribological Behavior ◽  
Wear Behavior ◽  
Matrix Material ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Aluminum Matrix Composites ◽  
Wear Loss ◽  
Matrix Composites ◽  
Casting Technique ◽  
Pin On Disc

AbstractThis research made an attempt to synthesize aluminum metal matrix composites through stir casting technique. The matrix material chosen in this study was AA7050 and the reinforcement material was ZrSiO4. The composites AA7050, AA7050-10%ZrSiO4, and AA7050-15%ZrSiO4were used. The wear behavior of the aluminum matrix composites was investigated by using pin-on-disc tribometer. The advanced material has substantial development in tribological behavior when the reinforcement percentage is increased. From the experimental results, it was confirmed that sliding distance of 1200 m, applied load of 3 N and sliding speed of 2 m/s result in minimum wear loss and coefficient of friction, while adding 10%ZrSiO4to the AA7050.

Effect of addition of SiC particles on the Microstructure and Hardness of Al-SiC composite

10.30544/590 ◽  
2021 ◽  
Vol 27 (1) ◽  
pp. 49-56
Author(s):  
Hareesha G ◽  
N Chikkanna ◽  
Saleemsab Doddamani ◽  
Anilkumar S Kallimani
Keyword(s):  
Silicon Carbide ◽  
Stir Casting ◽  
Age Hardening ◽  
Particulate Composites ◽  
Matrix Composites ◽  
Hardness Testing ◽  
Casting Technique ◽  
Sic Particles ◽  
The Matrix ◽  
Aluminum Silicon Carbide

This work aims to investigate the effect of the addition of silicon carbide particles on the microstructure and the hardness of the Al-SiC metal matrix composites. The said composite is prepared using the stir casting technique for different weight percentages of the SiC particles. The higher composition of the reinforcement causes the clustering of the particles in the matrix. Thus, research has to be carried out on the aluminum-silicon carbide composites with the reinforcement 3wt%, 6wt%, 9wt%, and 12wt% of SiC particles to obtain the optimized composition. In order to study the microstructure and the reinforcement distribution in the matrix, a scanning electron microscope is utilized. The hardness testing has been carried out using the Vickers’ indentation technique for the as-cast and age hardening conditions. From the microstructural study, it is observed that the microstructure of the said composite exhibits the uniform distribution of the reinforcement. The EDX results show the presence of the reinforcing elements in the Al-SiC composite. From the results obtained from the hardness testing, it is observed that the presence of the carbide element in the composite increases the hardness of the Al-SiC particulate composites.

Synthesis and mechanical behaviour of green metal matrix composites using waste eggshells as reinforcement material

2016 ◽  
Vol 5 (3) ◽  
Author(s):  
Shashi Prakash Dwivedi ◽  
Satpal Sharma ◽  
Raghvendra Kumar Mishra
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Testing Machine ◽  
Matrix Alloy ◽  
Stir Casting ◽  
Matrix Composites ◽  
Casting Technique ◽  
The Matrix ◽  
Chicken Eggshell

AbstractChicken eggshell (ES) is an aviculture by-product that has been listed worldwide as one of the worst environmental problems. The effective utilisation of ES biowaste is strongly encouraged in our society due to environmental and economic reasons. The aluminium alloy (AA) 2014/5 wt% carbonised ES metal matrix composite used in this study was fabricated by electromagnetic stir casting technique at parameters of 12 A (current), 180 s (time) and 700°C (matrix pouring temperature), respectively, and immediately extruded on universal testing machine at 60 MPa using cylindrical H13 tool steel die coated with graphite to avoid upper flow of ES particles and to improve wettability of carbonised ES with AA2014 alloy. Microstructures of composites show uniform distribution of carbonised ES particles. Density and overall cost of the metal matrix composite decreases 3.57% and 5%, respectively, when carbonised ES particulate is added 5% by weight. Tensile strength, hardness, toughness and fatigue strength of AA2014/5 wt% carbonized eggshell composite were also measured. Results show an improvement in these mechanical properties with addition of ES in the matrix alloy.

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.

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