SiC Particulate Reinforced Aluminium Metal Matrix Composite

Patel, Murlidhar; BHUPENDRA, PARDHI; Pal, Manoj Kumar; Singh, Mukesh Kumar

doi:10.21467/ajgr.5.1.8-15

Cited by 22 publications

(7 citation statements)

References 23 publications

(23 reference statements)

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“…The silicon carbide particles are randomly dispersed in a Ti6Al4V(ELI) matrix to create a composite. The SiC particles are ceramics and are stiffer and more bri le than Ti6Al4V(ELI) which is a ductile material [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Analysis of Low and High SiC Volume Fraction Additively Manufactured SiC/Ti6Al4V(ELI) Composites Based on the Best Process Parameters of Laser Power, Scanning Speed and Hatch Distance

Thamae,

Maringa,

du Preez

2024

Materials

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Silicon carbide (SiC) exhibits intriguing thermo-physical properties such as higher heat capacity and conductivity, as well as a lower density than Ti6Al4V(ELI). These properties make SiC a good candidate for the reinforcement of Ti6Al4V(ELI) with respect to its use as a heat shield in aero turbines to increase their efficiency. The traditional materials used in aircraft structures were required to have a combination of good mechanical properties such as strength, stiffness, and hardness and low weight, as well as low thermo-physical properties such as coefficient of thermal expansion (CTE) and thermal conductivity. The alloy Ti6Al4V(ELI) has a density of 4.45 g/cm3, which is lower than that of structural steel (7.4 g/cm3) and higher than that of aluminium (2.5 g/cm3). Lower density benefits light weighting. Aluminium is the lightest of the traditional materials used but has relatively low strength. The CTE of SiC of 4.6 × 10−6/K is lower than that of Ti6Al4V(ELI) of 8.6 × 10−6/K, while the density of SiC of 3.21 g/cm3 is lower than that of Ti6Al4V(ELI) of 4.45 g/cm3. Therefore, from the theory of composites, SiC/Ti6Al4V(ELI) composites are expected to have lower densities and CTEs than those of Ti6Al4V(ELI), thus providing for lightweighting and less thermal related buckling or separation at their joints with carbon/epoxy resin panels. The specific strength, stiffness, and Knoop hardness of SiC of 75–490 kNm/kg, 132 MNm/kg, and 600–3800 GPa, respectively, are generally larger than those of Ti6Al4V(ELI) of 211 KNm/kg, 24 MNm/kg, and 880 GPa, respectively. Therefore, investigating reinforcement of Ti6Al4V(ELI) with SiC particles is worthwhile as it will lead to the formation of composites that are stronger, stiffer, harder, and lighter, with lower values of CTE. For additive manufacturing, this requires initial studies to optimise the process parameters of laser power and scanning speed for single tracks. To print single tracks in the present work, different laser powers ranging from 100 W to 350 W and scanning speeds ranging from 0.3 m/s to 2.7 m/s were used for different SiC volume fraction values of values. To print single layers, different values of hatch distance were used together with the best values of laser power and scanning speed determined elsewhere by the authors for different volume fractions of SiC. Through optical microscopy, the built tracks and their cross sections were examined. By using laser power and scanning speeds of 200 W and 1.2 m/s, and 150 W and 0.8 m/s, respectively, the best tracks at 5% and 10% volume fractions were obtained, whereas the best tracks at 25% volume fraction were achieved using a laser power of 200 W and a scanning speed of 0.5 m/s. Furthermore, the results showed that the maximum SiC volume percentage of 30% resulted in limited or no penetration. Therefore, it is concluded from the study that parts with improved mechanical properties can be produced at SiC volume fractions ranging from 5% to 25%, while parts produced at the high volume fraction of 30 % would have unacceptable mechanical qualities for the final part.

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Section: Introductionmentioning

confidence: 99%

A Comparative Analysis of Low and High SiC Volume Fraction Additively Manufactured SiC/Ti6Al4V(ELI) Composites Based on the Best Process Parameters of Laser Power, Scanning Speed and Hatch Distance

Thamae,

Maringa,

du Preez

2024

Materials

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“…% of ceramic particulates content. Murlidhar Patel et al [19] in their study, made efforts to develop an Al composite reinforced with SiC by using liquid stircasting technique. It was observed that, composites mechanical behavior improved by the adding of SiC.…”

Section: Introductionmentioning

confidence: 99%

Impact of nano sized SiC and Gr on mechanical properties of aerospace grade Al7075 composites

Ravikumar

Nail

2022

Frattura Ed Integrità Strutturale

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Aluminum composites exhibit high resistance to wear and corrosion, possess high strength, offer durability and more such properties. In this study, Al7075, reinforced with nano size SiC - Gr was produced by a stir casting technique and its microstructure and mechanical behavior were evaluated. Reinforcements were added in the range of 0 - 3 wt. %. The microstructure study, tensile and compression strength of the developed hybrid Metal Matrix Composites have been analyzed and examined. From the investigational study, it was found that the reinforcements are evenly dispersed in the base material. The porosity and density of the developed composites were found to be enhanced. The mechanical properties such as ultimate tensile and compressive strength of the developed MMCs could be improved by addition of SiC particulates compared to base material. Further, the strength of developed hybrid composites was found to be decreased by adding of solid lubricant such as graphite (Gr) particulates along with hard ceramic particulates. Finally, fractured surface of the tensile test specimens were analysed using a SEM analysis.

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“…This problem leads to an easy crash of material on the application of high load. It may be controlled by incorporating particulate materials like SiC, B4C, etc., into the aluminium alloy matrix [5,6]. However, SiC/B4C as reinforcement material creates additional problems of depletion of the aluminium oxide layer formed on the composite surface.…”

Section: Introductionmentioning

confidence: 99%

Gravimetric, Electrochemical and Theoretical Study on Corrosion of AA6061/3wt% SiC/3wt% B4C Hybrid Composite in Acid Medium Using EDTA

Robledo¹,

Shetty²,

Kumari³

et al. 2022

Tribol. Ind.

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The corrosion behaviour of Al6061/3wt%SiC/3wt%B4C hybrid composite was investigated in the presence of 0.5M HCl medium using gravimetric, electrochemical, and theoretical methods. In the present work, ethylenediaminetetraacetic acid disodium (EDTA) was used as an eco-friendly inhibitor. EDTA showed mixed inhibitor behavior, and its inhibition performance decreased with rising temperature from 303 to 323 K. EDTA evinced maximum inhibition efficiency of 82 % at 1.074 mM. The kinetic and thermodynamic results controlling corrosion were evaluated. The inhibition process occurred through the adsorption of EDTA on the hybrid composite sample, which obeyed Langmuir's adsorption isotherm. The experimental results were validated by theoretical study. The corroded and inhibited specimen's surface analysis performed using scanning electron microscopy (SEM) and atomic force microscopy (AFM) confirmed the adsorption of EDTA on the hybrid composite surface.

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SiC Particulate Reinforced Aluminium Metal Matrix Composite

Cited by 22 publications

References 23 publications

A Comparative Analysis of Low and High SiC Volume Fraction Additively Manufactured SiC/Ti6Al4V(ELI) Composites Based on the Best Process Parameters of Laser Power, Scanning Speed and Hatch Distance

A Comparative Analysis of Low and High SiC Volume Fraction Additively Manufactured SiC/Ti6Al4V(ELI) Composites Based on the Best Process Parameters of Laser Power, Scanning Speed and Hatch Distance

Impact of nano sized SiC and Gr on mechanical properties of aerospace grade Al7075 composites

Gravimetric, Electrochemical and Theoretical Study on Corrosion of AA6061/3wt% SiC/3wt% B4C Hybrid Composite in Acid Medium Using EDTA

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