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Composites: Mechanics, Computations, Applications: An International Journal

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ISSN Print: 2152-2057

ISSN Online: 2152-2073

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UNDERSTANDING THE OPTIMIZED EFFECT OF MULTIPLE REINFORCEMENT ON IMPACT STRENGTH AND HARDNESS FOR AA6061/AL2O3/SIC REINFORCED COMPOSITE USING TAGUCHI TECHNIQUE AND GREY RELATION ANALYSIS

Volume 14, Issue 2, 2023, pp. 13-27
DOI: 10.1615/CompMechComputApplIntJ.2022044779
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ABSTRACT

Aluminium matrix composite with the reinforcements of Al2O3 and SiC were fabricated by using stir casting together with the application of squeeze casting. The percentage of the volume fractions of both the reinforcement varied between 2% to 4% and the combinations were made for the experiments. It is a novelty because less work is required for the combination of the above reinforcements and their effect on the properties. The presence and uniform distribution of Al2O3 and SiC are confirmed by microstructural analysis. Hardness as well as tests were carried out as per ASTM standards for the Charpy test and hardness test by Brinell hardness tester. ANOVA analysis found the effect of the two reinforcement agents. The effect of the varied reinforcement combinations was analyzed and the optimum value of hardness and impact strength is predicted by the use of Taguchi technique. Impact strength and hardness show an increasing trend up to level 3 having impact strength = 17.1 kJ/m2, and a hardness of 79.2 BHN.

Figures

  • Processing procedure for squeeze cast product (i) stirring of molten metal with mixed ball milled reinforcement. (ii) Pouring of molten metal into die. (iii) Squeeze casting with the help of a punch by UTM. (iv) Final cast product.
  • Images FESEM (a) 4% Al2O3 + 2% SiC cast composite; (b) 4% Al2O3 + 2% SiC cast composite; (c) 2% Al2O3 + 4% SiC cast composite; (d) 2% Al2O3 + 4% SiC cast composite
  • Images FESEM (a) 4% Al2O3 + 2% SiC cast composite; (b) 4% Al2O3 + 2% SiC cast composite; (c) 2% Al2O3 + 4% SiC cast composite; (d) 2% Al2O3 + 4% SiC cast composite
  • Images FESEM (a) 4% Al2O3 + 2% SiC cast composite; (b) 4% Al2O3 + 2% SiC cast composite; (c) 2% Al2O3 + 4% SiC cast composite; (d) 2% Al2O3 + 4% SiC cast composite
  • Images FESEM (a) 4% Al2O3 + 2% SiC cast composite; (b) 4% Al2O3 + 2% SiC cast composite; (c) 2% Al2O3 + 4% SiC cast composite; (d) 2% Al2O3 + 4% SiC cast composite
  • FESEM images for (a) 4% Al2O3 + 2% SiC cast composite; (b) 4% Al2O3 + 2% SiC cast composite; (c) 3% Al2O3 + 3% SiC cast composite; (d) 2% Al2O3 + 4% SiC cast composite
  • FESEM images for (a) 4% Al2O3 + 2% SiC cast composite; (b) 4% Al2O3 + 2% SiC cast composite; (c) 3% Al2O3 + 3% SiC cast composite; (d) 2% Al2O3 + 4% SiC cast composite
  • FESEM images for (a) 4% Al2O3 + 2% SiC cast composite; (b) 4% Al2O3 + 2% SiC cast composite; (c) 3% Al2O3 + 3% SiC cast composite; (d) 2% Al2O3 + 4% SiC cast composite
  • FESEM images for (a) 4% Al2O3 + 2% SiC cast composite; (b) 4% Al2O3 + 2% SiC cast composite; (c) 3% Al2O3 + 3% SiC cast composite; (d) 2% Al2O3 + 4% SiC cast composite
  • Chemical composition distribution of particles
  • Main effects plot mean hardness
  • Main effects plot S/N ratio hardness
  • Main effects plot mean impact strength
  • Main effects plot for S/N ratio impact strength
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