Corrosion Investigation and Microstructure of High Calcium Fly Ash Reinforced Al6061

In this study, the effect of high Ca fly ash on the corrosion behavior and microstructure of Al6061 alloy matrix composite was investigated. The Al6061 matrix composites containing 5, 7, and 10 wt% of fly ash particles were prepared by the stir casting process. The corrosion behavior was investigated using potentiodynamic polarization measurement using 5 wt% NaCl. The results revealed that the Icorr increased from 2.44 µA/cm2 to 8.60 µA/cm2 as the fly ash concentration increased from 5 wt% to 10 wt%. This increase of Icorr indicates an increase of the corrosion rate. The corrosion mainly occurs at the interface between fly ash particles and Al 6061 matrix.

Download Full-text

Regression Modeling and Experimental Investigations on Ageing Behavior of Nano-Fly Ash Reinforced Al-10wt%Mg Alloy Matrix Composites

International Journal of Surface Engineering and Interdisciplinary Materials Science ◽

10.4018/ijseims.2018070103 ◽

2018 ◽

Vol 6 (2) ◽

pp. 36-49

Author(s):

Srinivasa Prasad Katrenipadu ◽

Swami Naidu Gurugubelli

Keyword(s):

Fly Ash ◽

Regression Model ◽

Weight Fraction ◽

Stir Casting ◽

Mg Alloy ◽

Peak Hardness ◽

Experimental Investigations ◽

Matrix Composites ◽

Casting Method ◽

Alloy Matrix

Nano-fly ash particles reinforced Al-10wt%Mg alloy matrix composites produced by stir-casting method were tested for their ageing response. Ageing studies were performed at 160 °C, 200 °C and 240 °C temperatures and a maximum peak hardness of 142 VHN was observed during ageing at 200 °C for the composite with 10 wt% nano fly ash reinforcement. This is due to rapid nucleation and growth of βI particles at this temperature. Experiments were designed for different compositions and different ageing temperatures on the basis of the Design of Experiments technique. The factorial design is considered to improve the reliability of results and to reduce the size of experimentation without loss of accuracy. A model to predict the ageing behaviour of the composites was developed with the terms of 5, 10 and 15% weight fraction of fly ash at 160 °C, 200 °C and 240 °C ageing temperatures. The developed regression model was validated by statistical software MINITAB-R17.1.0. It was found that the developed regression model could be effectively used to predict the ageing behavior at 95% confidence level.

Download Full-text

Synthesis and Characterization of Al 7075 Alloy Reinforced with Silicon Carbide and Fly Ash

International Journal of Vehicle Structures and Systems ◽

10.4273/ijvss.11.3.10 ◽

2019 ◽

Vol 11 (3) ◽

Author(s):

G. Sathishkumar ◽

S.J. Irudayaraja ◽

S. Sivaganesan ◽

M. Thuyavan

Keyword(s):

Mechanical Properties ◽

Fly Ash ◽

Casting Process ◽

Stir Casting ◽

Industrial Applications ◽

Matrix Composites ◽

Specific Strength ◽

Al 7075 ◽

7075 Alloy

Metal matrix composites are of great interest in industrial applications for its light weight with high specific strength, stiffness and heat resistance. The processing of MMCs by stir casting process is an effective way of manufacturing. In this paper the comparison of mechanical properties of Aluminium 7075 as a base metal and varying composition of fly ash by 3 and 6 wt.% SiC and 7% fly ash as reinforcement is carried out. Scanning electron microscope was used to confirm the presence of SiC and fly ash. The composites with 6% SiC was found to have maximum hardness whereas composites of 6% and 5 % fly ash were found to have minimum hardness. The mechanical properties such as wear resistance were studied. From the results, it has been finalized that the addition of 6% SiC was identified to show the least wear rate.

Download Full-text

Analysis of Surface Roughness and Burr Height in Drilling of Aluminium Matrix Composites using Taguchi Technique

INCAS BULLETIN ◽

10.13111/2066-8201.2020.12.2.15 ◽

2020 ◽

Vol 12 (2) ◽

pp. 173-182

Author(s):

C. SARALA RUBI ◽

J. UDAYA PRAKASH

Keyword(s):

Surface Roughness ◽

Fly Ash ◽

Casting Process ◽

Stir Casting ◽

Al Alloy ◽

Matrix Composites ◽

Taguchi Technique ◽

Burr Height ◽

Response Table ◽

Reinforcing Material

The present research involves the opportunity of utilising the signal to noise (S/N) ratio analysis to set machining factors in the drilling of aluminium alloy LM6-Fly ash composites (AMCs). The purpose of this research is to understand, during drilling of AMCs, the consequences of variables, feed rate, spindle speed, drill material and amount of reinforcing material on surface roughness and burr height. AMCs are formed with LM6 (Al alloy) as continuous component via the stir casting process and fly ash as reinforced content. The Taguchi design strategy is a widely accepted method which is used to produce quality products that require minimum commitment. Likewise, the L27 orthogonal array is used for conducting experiments. The response table, response graphs and analysis of variance (ANOVA) illustrate the prospective atmosphere and the impacts of input process variables. Taguchi technique considerably enhances the drilling operation.

Download Full-text

Characterisation of Silicon Carbide and Fly Ash in LM13 Aluminium Alloy Matrix Composites

International Journal of Vehicle Structures and Systems ◽

10.4273/ijvss.8.2.07 ◽

2016 ◽

Vol 8 (2) ◽

Author(s):

C. Krishnaraj ◽

P. Divinesh ◽

O.M. Mohaideen

Keyword(s):

Silicon Carbide ◽

Fly Ash ◽

Aluminium Alloy ◽

Matrix Composite ◽

Stir Casting ◽

Matrix Composites ◽

Alloy Matrix ◽

The Matrix ◽

Materials Used ◽

Aluminium Alloy Matrix

The modern vehicles demand more thermal and mechanical properties as the speed of the vehicles is increasing. The materials used should be able to not only withstand the high temperatures but to dissipate it at a faster rate without deformation. This paper investigates the characteristics of silicon carbide (SiC) and fly ash in LM13 aluminium alloy matrix composite prepared by stir casting. The LM13 alloy has high thermal property which makes it ideal for making engines and gears. The effect of fly ash and SiC on LM13 and its influence on increasing the surface roughness was analyzed by varying their proportion. The addition of SiC and fly ash to the matrix composite increases the hardness and tensile strength of the composite which is validated by experimental results.

Download Full-text

Mechanical and Corrosion Behavior of Al7075 (Hybrid) Metal Matrix Composites by Two Step Stir Casting Process

Latin American Journal of Solids and Structures ◽

10.1590/1679-78253132 ◽

2017 ◽

Vol 14 (2) ◽

pp. 243-255 ◽

Cited By ~ 25

Author(s):

M. Sambathkumar ◽

P. Navaneethakrishnan ◽

K. Ponappa ◽

K.S.K. Sasikumar

Keyword(s):

Metal Matrix Composites ◽

Corrosion Behavior ◽

Metal Matrix ◽

Casting Process ◽

Stir Casting ◽

Matrix Composites ◽

Hybrid Metal Matrix Composites

Download Full-text

A Review on AA 6061 Metal Matrix Composites Produced by Stir Casting

Materials ◽

10.3390/ma14010175 ◽

2021 ◽

Vol 14 (1) ◽

pp. 175

Author(s):

Ansar Kareem ◽

Jaber Abu Qudeiri ◽

Asarudheen Abdudeen ◽

Thanveer Ahammed ◽

Aiman Ziout

Keyword(s):

Aluminium Alloy ◽

Hybrid Composites ◽

Casting Process ◽

Stir Casting ◽

Advanced Materials ◽

Matrix Composites ◽

Alloy Matrix ◽

Aluminium Matrix Composite ◽

Mechanical And Tribological Properties ◽

6061 Aluminium Alloy

In recent years, many alloys as well as composites of aluminium were developed for enhanced material performance. AA 6061 is an aluminium alloy that has extensive applications due to its superior material characteristics. It is a popular choice of matrix for aluminium matrix composite (AMC) fabrication. This study provides a review on AA 6061 aluminium alloy matrix composites produced through the stir-casting process. It focusses on conventional stir-casting fabrication, process parameters, various reinforcements used, and the mechanical properties of the AA 6061 composites. Several research studies indicated that the stir-casting method is widely used and suitable for fabricating AA 6061 composites with reinforcements such as SiC, B4C, Al2O3, TiC, as well as other inorganic, organic, hybrid, and nanomaterials. The majority of the studies showed that an increase in the reinforcement content enhanced the mechanical and tribological properties of the composites. Furthermore, hybrid composites showed better material properties than single reinforcement composites. The usage of industrial and agricultural residues in hybrid composites is also reported. Future studies could focus on the fabrication of AA 6061 nanocomposites through stir casting and their material characterisation, since they have great potential as advanced materials.

Download Full-text