Effects of stir casting process parameters on dispersion of reinforcement particles during preparation of metal composites

The microstructural and mechanical properties of alumina reinforced Al7010 matrix composites, fabricated by stir casting, were investigated by varying size and volume fractions of alumina particles. The optical microscope, micro Vickers hardness tester, tensile tester, and impact testers were used to evaluate the microstructure and mechanical properties of produced alumina reinforced Al7010 matrix composites. Results show that the alumina reinforced Al7010 matrix composites, incorporating lower volume fractions of alumina particles, exhibited much better morphological and mechanical properties than composites with higher volume fractions. The composite with 14% alumina particles of size 15 µm exhibited uniform dispersion of alumina particles in the Al7010 matrix with superior interfacial bonding and negligible agglomeration of alumina particles and excellent morphological properties. On the other hand, the composite, having 21% alumina particles of size 1 µm demonstrated very poor morphological properties and intensive agglomeration of alumina particles. Similarly, the maximum values of Rm (349 MPa) and ÆT (3.41%) were also offered by composite, incorporating 14% Al2O3 particles of size 15 µm attributed to the uniform dispersion and negligible agglomeration of alumina particles throughout the matrix. The composite with 21% alumina particles of size 1 µm offered the minimum values of Rm (172 MPa) and ÆT (1.69%) due to the presence of intensive agglomeration of alumina particles. The superior impact toughness (11.4 J) and the overall optimum combination of morphological and mechanical properties were offered by the composite with 14% alumina particles of size 15 µm.

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“…good reinforced Al7010 matrix composites are plotted in agreement with the work of James et al[27,28]. Figure6.…”

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confidence: 82%

Microstructural and mechanical properties of Al2O3 reinforced Al7010 matrix composites, fabricated by stir casting

Farooq

Wahid

Hafeez

et al. 2021

JPIChE

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“…Rangrej et al [20], studied stir casting process factors such as blade angle (45°, 60°, 90°), stirring speed (500, 600, 700) rpm and found that the blade angle 60°results in uniform reinforcement particle distribution and improved mechanical characteristics. G G Sozhamannan et al [21] investigated on stir casting process parameters at various temperatures and holding times to better understand the effect of process factors and reported uniform particle dispersion in the matrix obtained with processing temperatures of 750 °C and 800 °C.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on mechanical properties of AA7068/marble dust/fly ash hybrid composite processed by stir casting technique

KSD¹,

P²,

Ratnam³

2022

Eng. Res. Express

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Aluminum alloys have wide applications in serval industrial sectors like aerospace, automobile and manufacturing industries. Aluminum reinforced with industrial wastes manufactured through stir casting technique showed potential industrial applications. These hybrid aluminum metal matrix composites are light in weight compared to their counterparts. However, stir casting process parameters effects the mechanical properties of the stir casted aluminum hybrid composites. Hence, there is a need for research to find the optimal stir casting process parameters. The current work focusses on experimental investigation of stir casting technique to find the effect of the process parameters on the uniform distribution of reinforced marble dust and fly ash particulates and mechanical properties such as the tensile strength and the hardness. The various parameters considered in this work especially stirring speed (300, 350, 400) rpm, stirring time (3, 5, and 7) min, stirring temperature (750 oC, 800 oC, and 850 oC) and percentage of reinforcement (3%, 5% and 7%). The mathematical and statistical approach of Response Surface Method (RSM) is used to optimize the stir casting parameters in addition to study interaction effects of process parameters by using response surface and interaction plots. Fabricated metal matrix composites have been characterized by using a Field Emission Scanning Electron Microscope (FESEM), inorder to examine the particle dispersion in the aluminium matrix. The significance of statistical results was evaluated with the analysis of variance (ANOVA) based on P-values and coefficients of corelation (R2). Results indicate that the best values for tensile strength and hardness is achieved at processing conditions of stirring at 900 °C with stirrer speed of 407.56 rpm and the stirring time 7.46 min. The 8.11 % reinforcement has the highest tensile strength and hardness values of 347.84 MPa and 153.70 Hv, respectively, with composite desirability of 0.96.

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“…But it is difficult to measure the velocity distribution of molten aluminum under such a tough environment. Till date, with the help of computational simulation and numerical analysis method, several researchers [ 21–23 ] have paid attention on the quantification of particles clustering in the aluminum matrix composites under different fluid field parameters.…”

Section: Introductionmentioning

confidence: 99%

“…As far as the two‐phase solid–liquid flow, the particles with a lower density will float on or suspense in the fluid. A few researchers [ 18,19,23 ] provided the effect of the stirring rates and the shape of the stirrer on the fluid field and the particles distribution of the AMCs’ stir casting process. Generally, the in situ method is widely used in the stir casting technique.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Stirring Velocity and the SiO₂ Precursor Particles Feeding Rate on the Microstructure of the Al₂O₃/SiO₂/Al Composites Prepared via Stir Casting Process

et al. 2022

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Effects of stir casting process parameters on dispersion of reinforcement particles during preparation of metal composites

Cited by 15 publications

References 22 publications

Microstructural and mechanical properties of Al2O3 reinforced Al7010 matrix composites, fabricated by stir casting

Microstructural and mechanical properties of Al2O3 reinforced Al7010 matrix composites, fabricated by stir casting

Experimental investigation on mechanical properties of AA7068/marble dust/fly ash hybrid composite processed by stir casting technique

Effect of the Stirring Velocity and the SiO₂ Precursor Particles Feeding Rate on the Microstructure of the Al₂O₃/SiO₂/Al Composites Prepared via Stir Casting Process

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Effects of stir casting process parameters on dispersion of reinforcement particles during preparation of metal composites

Cited by 15 publications

References 22 publications

Microstructural and mechanical properties of Al2O3 reinforced Al7010 matrix composites, fabricated by stir casting

Microstructural and mechanical properties of Al2O3 reinforced Al7010 matrix composites, fabricated by stir casting

Experimental investigation on mechanical properties of AA7068/marble dust/fly ash hybrid composite processed by stir casting technique

Effect of the Stirring Velocity and the SiO2 Precursor Particles Feeding Rate on the Microstructure of the Al2O3/SiO2/Al Composites Prepared via Stir Casting Process

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Effect of the Stirring Velocity and the SiO₂ Precursor Particles Feeding Rate on the Microstructure of the Al₂O₃/SiO₂/Al Composites Prepared via Stir Casting Process