Fabrication, Mechanical Characterization, and Ranking of Shell Ash Reinforced Al-7075-Based Hybrid Composites | Journal of Engineering Sciences

Fabrication, Mechanical Characterization, and Ranking of Shell Ash Reinforced Al-7075-Based Hybrid Composites

Author(s): E. V. Ratna Kumar G.1*, Senthil Kumar K.1, Ranga Babu J. A.2

1 Department of Mechanical Engineering, Annamalai University, Annamalai Nagar, 608002 Tamil Nadu, India;
2 Department of Mechanical Engineering, Seshadri Rao Gudlavalleru Engineering College, 521356 Gudlavalleru Andhra Pradesh, India

*Corresponding Author’s Address: [email protected]

Issue: Volume 10, Issue 2 (2023)

Submitted: June 18, 2023
Received in revised form: September 15, 2023
Accepted for publication: September 18, 2023
Available online: September 21, 2023

E. V. Ratna Kumar G., Senthil Kumar K., Ranga Babu J. A. (2023). Fabrication, mechanical characterization, and ranking of shell ash reinforced Al-7075-based hybrid composites. Journal of Engineering Sciences (Ukraine), Vol. 10(2), pp. C36–C48. DOI: 10.21272/jes.2023.10(2).c5

DOI: 10.21272/jes.2023.10(2).c5

Research Area:  MANUFACTURING ENGINEERING: Materials Science

Abstract. In the research article, the fabrication of Al-7075-based hybrid composites was done by stir casting technique with the addition of a mixture of crab shell ash (CSA), oyster shell ash (OSA), and snail shell ash (SSA). The mixtures of CSA, OSA, and SSA (MCOSA), CSA and OSA (MCOA), CSA and SSA (MCSA), as well as OSA and SSA (MOSA) with weight percentages in a range of 1–3% were added to the base material. The specimens were prepared according to the ASTM standards and tested for mechanical properties. The hardness, as well as impact, flexural, and tensile strengths of the composites, were increased as the amount of reinforcement to the base metal was increased, and compressive strength was decreased. The greatest tensile strength, tensile modulus, and compressive strength values were observed for the composite designated with AlOSA3. The maximum flexural strength and hardness values were observed for the compositions AlOS21 and AlCO12, respectively. Two techniques (TOPSIS and VIKOR) were successfully applied to the mechanical attributes of composites. The ranking results of both methods were compared. The ranking results for TOPSIS and VIKOR were the same for the index value 0.25. The composites filled with aquatic waste fillers can be used for automotive applications concerning their enhanced mechanical properties compared to the Al-7075 metal alloy properties.

Keywords: hybrid composite, mechanical properties, TOPSIS, VIKOR, ranking.


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