Experimental Investigation, Modeling and Optimization of Tribological Parameters of AA6061/SiC/B4C Hybrid Nano Composites

2019 ◽  
Vol 801 ◽  
pp. 83-88
Author(s):  
Shubhajit Das ◽  
Santosh K. Tamang ◽  
M. Chandrasekaran ◽  
Sutanu Samanta
Keyword(s):  
Experimental Investigation ◽  
Stir Casting ◽  
Hybrid Nanocomposites ◽  
Nano Composites ◽  
Multi Objective Optimization ◽  
Sliding Speed ◽  
Casting Technique ◽  
Desirability Analysis ◽  
Sliding Distance ◽  
Tribological Parameters

The present work investigates the tribological properties of AA6061/1.5 wt.% SiC/1.5 wt.% B4C hybrid nanocomposites prepared using stir casting technique. The effect of sliding distance, sliding speed and load were investigated on wear rate (WR) and coefficient of friction (COF). Response surface methodology was used to predict and model the responses. Analysis of variance showed that sliding speed and load were the significant factor affecting WR and COF respectively. Desirability analysis was performed for both single and multi-objective optimization. The minimum WR and COF were found to be 0.0015 mm3/m and 0.2430 at sliding distance of 1939.39 m, sliding speed of 1.99 m/s and load of 10 N.

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.

scholarly journals Microstructure, Tensile Properties and Hardness Behavior of Al7075 Matrix Composites Reinforced With Graphene Nanoplatelets and Beryl Fabricated by Stir Casting Method

2019 ◽  
Vol 9 (1) ◽  
pp. 6761-6765 ◽  
Keyword(s):  
Tensile Strength ◽  
Volume Fraction ◽  
Hybrid Composites ◽  
Matrix Material ◽  
Stir Casting ◽  
Hybrid Nanocomposites ◽  
Homogeneous Distribution ◽  
Casting Technique ◽  
Aluminum 7075 ◽  
Scanning Electron

In this research, an effort is made to familiarize and best potentials of the reinforcing agent in aluminum 7075 matrices with naturally occurring Beryl (Be) and Graphene (Gr) to develop a new hybrid composite material. A stir casting technique was adopted to synthesize the hybrid nanocomposites. GNPS were added in volume fractions of 0.5wt%, 1wt%, 1.5wt%, and 2wt% and with a fixed volume fraction of 6 wt.% of Beryl. As cast hybrid composites were microstructurally characterized with scanning electron microscopy and X-ray diffraction. Microstructure study through scanning electron microscope demonstrated that the homogeneous distribution reinforcement Beryl and GNPs into the Al7075 matrix. Brinell hardness and tensile strength of synthesized materials were investigated. The hybrid Al7075-Beryl-GNPs composites showed better mechanical properties compared with base Al7075 matrix material. The ascast Al7075-6wt.% Beryl-2wt.%GNPs showed 49.41% improvement in hardness and 77.09% enhancement in ultimate tensile strength over Al7075 alloy.

Dry sliding tribological properties of A356-SiCP aluminum matrix composites prepared by vacuum stir casting

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jiaqi Pan ◽  
Xiaoshan Liu ◽  
Guoqiu He ◽  
Bin Ge ◽  
Peiwen Le ◽  
...  
Keyword(s):  
Wear Rate ◽  
Tribological Properties ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Particle Content ◽  
Sliding Speed ◽  
Content Type ◽  
Casting Technique

Purpose The purpose of this paper is to understand the effect of particle content, applied load and sliding speed on the tribological properties of A356-SiCP composites manufactured using a newly developed vacuum stir casting technique. Design/methodology/approach A356 alloy reinforced with 10, 15 and 20 vol% SiC particles was prepared by vacuum stir casting. Tribological tests were carried out on block-on-ring tribometer under dry sliding conditions, room temperature. Wear mechanism was investigated by scanning electron microscope and energy dispersion spectrum. Findings SiCP is homogeneously dispersed in the matrix. The increase in SiCP content decrease wear rate, but it leads to an increase in coefficient of friction. The wear rate increase and friction coefficient present different variation trends with increasing load. For A356-20%SiCP composite, when the load is less than 10 MPa, wear rate and friction coefficient under sliding speed of 400 rpm are lower than those of 200 rpm. Wear mechanism transition from abrasion, oxidation, delamination, adhesion to plastic flow as load and sliding speed increasing. Practical implications Results of this study will help guide the use of A356-SiCP in many automotive products such as brake rotors, brake pads, brake drums and pistons. Originality/value There are few paper studies the effect of particle content, applied load and sliding speed on the tribological properties of A356-SiCP composites. Aluminum matrix composites with uniform distribution of reinforcing particles were successfully prepared by using the newly developed vacuum stir casting technique.

Prediction and Optimization of Parameters for the Al5083/ B4C Composite Wear Rate

2020 ◽  
Vol 16 (4) ◽  
pp. 584-594
Author(s):  
Ram Singh ◽  
Malik Shadab ◽  
Rabisankar Debnath ◽  
Ram Naresh Rai
Keyword(s):  
Wear Rate ◽  
Applied Load ◽  
Influencing Factor ◽  
Electrical Contact ◽  
Stir Casting ◽  
Ex Situ ◽  
Wear Testing ◽  
Specimen Preparation ◽  
Sliding Speed ◽  
Casting Technique

Background: Al5083 has been basically used in marine and aerospace applications where it is intended for higher corrosion resistance and better weldability. Again this, Al5083 matrix has not been suitable for various other applications such as electrical contact brushes, cylinder liners, artificial joints and helicopter blades due to its poor wear resistance properties. Objective: The aim of this research is the optimization of wear rate of the composite with Al5083 matrix, reinforced with B4C (Boron carbide) particles, and it is achieved through the investigation of the subsequent effect: wt.% of the reinforcement, applied load and sliding speed. Methods: The material used for specimen is Al5083 and Al5083/B4C composite which is melted at 750°C in an induction furnace; the composite is prepared by stir casting technique. It was developed by an ex-situ technique. The liquid melt poured into preheated cast iron mould for carrying out the specimen preparation of wear testing. Results: The wear rate of Al5083/B4C composite is less than Al5083, the most influencing factor on wear rate is applied load and mechanism of deformation induced in the sliding surface of the pin was analysed by SEM (scanning electron microscope). Conclusion: Wear rate of Al5083 and Al5083/B4C composite increases with the increase of applied load, sliding speed and decreases as the wt. % B4C increases. The contribution of applied load is more in wear rate as compared to the other two factors and the value predicted by Taguchi, obtained by RSM (Response surface methodology) and evaluated by experiment are almost similar.

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 Fabrication and Properties of Aluminium Matrix Hybrid Nanocomposites By Stir Casting Technique

2019 ◽  
Vol 8 (3) ◽  
pp. 6169-6173
Keyword(s):  
Silicon Carbide ◽  
Composite Materials ◽  
Weight Fraction ◽  
Stir Casting ◽  
Hybrid Nanocomposites ◽  
Nano Particles ◽  
Aluminum Composite ◽  
Casting Technique ◽  
The Matrix ◽  
Properties Of Composites

Regular materials like steel, brass, aluminum and so on will fall flat with no sign. Breaks commencement, spread will happens with in a limited ability to focus. Presently multi day to beat this issue, regular materials are supplanted by Aluminum Composite materials. The best alternative for aluminum composite materials is its unique ability to design the materials to provide necessary features. In this paper, classical simple techniques for manufacturing AMMCs with achievable characteristics are explored by dispersing silicon carbide micro and nano particles in the matrix. The matrix and the reinforcement material were chosen for aluminium (A356) and silicon carbide (micro and nano particles). Experiments carried out were a SiCmicro weight fraction for 10%, and a SiCmicro weight fraction varying for 1%, 2%, 3% and 4%. The result showed that the stir casting method was very successful in achieving uniform strengthening dispersion in the matrix. This was obvious by the improvement of properties of composites over the base metal. The increase in hardness, marginals decrease in electrical conductivity and marginal changes in relative density were shown to be aluminum hybrid nanocomposites

Evaluation of Wear Rate of Aluminium Hybrid Composites Fabricated through Stir Casting Technique

2019 ◽  
Vol 969 ◽  
pp. 110-115
Author(s):  
B. Venkatesh ◽  
S. Nagakalyan
Keyword(s):  
Wear Rate ◽  
Hybrid Composites ◽  
Wear Test ◽  
Stir Casting ◽  
Casting Technique ◽  
Pin On Disc ◽  
Sic Composites ◽  
Sic Reinforcement ◽  
Sliding Distance ◽  
Positive Effect

The Al2014 alloy is extensively used as a structural material in aerospace industry and also it is proving to fit as wear resistant materials especially in sliding wear applications. In the present paper, the wear analysis of hybrid Al-MMCs utilising Al2014 alloy as matrix and Silicon carbide (SiC) / Graphite (Gr) particulate reinforcements was studied by changing load, speed and percentage reinforcement. Al2014+10%SiC composites and Al2014/(5%SiC+5%Gr) were prepared using liquid state processing. The wear test is carried out by using pin on disc with sliding speeds range from 0.84-1.67m/s and loads from 25-75N and sliding distance of 1000m.The outcomes demonstrated that the connected load had positive effect on wear rate while sliding rate indicates reverse movement on wear rate. The incorporation of SiC and Gr is observed to be significant on account of self-lubricating impact of Gr and resistance to material plastic flow due to SiC reinforcement.

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.

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