Multi Objective Optimization of Aluminium (AA6061-SiC-Flyash) Metal Matrix Composites using TOPSIS Method

Year : 2026 | Volume : 14 | Special Issue 01 | Page : 459 469
    By

    V.V.D. Sahithi,

  • Shishir Kasturi,

  • K. Aruna Prabha,

  • P. Prasad Kumar,

  • PV Elumalai,

  • Pratheeka Dahagam,

  1. Assistant Professor, Department of Mechanical Engineering, Vallurupalli Nageswara Rao Vignana Jyothi Institute of Engineering &Technology, Hyderabad, Telangana, India
  2. B. Tech student, Department of Mechanical Engineering, Vallurupalli Nageswara Rao Vignana Jyothi Institute of Engineering &Technology, Hyderabad, Telangana, India
  3. Assistant Professor, Department of Mechanical Engineering, Vallurupalli Nageswara Rao Vignana Jyothi Institute of Engineering &Technology, Hyderabad, Telangana, India
  4. Assistant Professor, Department of Mechanical Engineering, Vallurupalli Nageswara Rao Vignana Jyothi Institute of Engineering &Technology, Hyderabad, Telangana, India
  5. Associate Professor, Department of Mechanical Engineering, Aditya University, Surampalem, Andhra Pradesh, India
  6. B.Tech student, Department of Mechanical Engineering, Vallurupalli Nageswara Rao Vignana Jyothi Institute of Engineering &Technology, Hyderabad, Telangana, India

Abstract

Metal Matrix Composites (MMCs) have significant interest due to their superior mechanical properties, including improved strength, hardness, and fracture resistance. This study investigates the optimization of the mechanical and fracture behaviour of casted AA6061-SiC-Fly Ash (FA) MMCs using the TOPSIS method. Silicon carbide(SiC) and fly ash (FA) reinforcements, with different weight percentages of 5%, 10%, and 15% were fabricated through sand casting method. Total 10 combinations of composites are prepared to understand the impact of reinforcements and their percentages on the mechanical properties. The specimens were evaluated through a series of mechanical characterization tests like Ultimate Tensile Strength (UTS), Impact Strength (IS), and Vickers Hardness (MVH), to evaluate the influence of reinforcement composition on the composite’s strength, toughness, and failure mechanisms. The TOPSIS optimization technique was applied to rank the specimens based on their mechanical performance, facilitating the identification of the optimum composite composition. The results revealed that specimen C9 with FA 5% and SiC 15% exhibited the highest impact strength (86 J) and a favorable combination of UTS (115.2 MPa) and hardness (67.5 Kgf), with 1st rank. The study highlights the critical role of SiC and FA reinforcements in improving the mechanical properties of AA6061-based MMCs, and it offers valuable insights for tailoring the composites for advanced engineering applications.

Keywords: Metal Matrix Composites, TOPSIS, AA6061 Aluminium Alloy, Optimization, hybrid composites

[This article belongs to Special Issue under section in Journal of Polymer & Composites (jopc)]

How to cite this article:
V.V.D. Sahithi, Shishir Kasturi, K. Aruna Prabha, P. Prasad Kumar, PV Elumalai, Pratheeka Dahagam. Multi Objective Optimization of Aluminium (AA6061-SiC-Flyash) Metal Matrix Composites using TOPSIS Method. Journal of Polymer & Composites. 2026; 14(01):459-469.
How to cite this URL:
V.V.D. Sahithi, Shishir Kasturi, K. Aruna Prabha, P. Prasad Kumar, PV Elumalai, Pratheeka Dahagam. Multi Objective Optimization of Aluminium (AA6061-SiC-Flyash) Metal Matrix Composites using TOPSIS Method. Journal of Polymer & Composites. 2026; 14(01):459-469. Available from: https://journals.stmjournals.com/jopc/article=2026/view=239938


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Special Issue Subscription Original Research
Volume 14
Special Issue 01
Received 26/06/2025
Accepted 17/07/2025
Published 17/02/2026
Publication Time 236 Days
20

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