Investigation of the effect of alomina nanoparticle on stir casting method parameters on mechanical properties of aluminum-based nanocomposites

Document Type : Original Article

Authors

1 Mech. Eng. Dep., Meybod Univ., Meybod, Iran

2 Yazd Desert Nanoalloy Cooperative Company, Yazd, Iran

3 Mech. Eng. Dep., Payame Noor Univ., Tehran, Iran

4 Faculty of Mechanical Engineering, Shahrood University of Technology

Abstract
Metal matrix nanocomposites are materials with various and diverse properties that are somewhat controllable, and for this reason, there is today a growing effort to apply them in different industries. In this regard, significant research has been conducted to manufacture, develop, and improve their properties, leading to the creation of new methods for fabricating these materials. One such method is the modified stir casting process. In this study, based on the modified stir casting method, aluminum matrix nanocomposites of “A357” reinforced with alumina nanoparticles at weight percentages of 0.5%, 1%, and 1.5% were fabricated under different conditions such as cooling rate of the melt and alloy state. Properties such as hardness, tensile strength, yield strength, elongation at yield, elongation at fracture, Young’s modulus, fracture toughness, and work hardening were investigated. Based on the results obtained, it was found that adding alumina nanoparticles to A357 aluminum results in a nanocomposite with mechanical properties significantly superior to the base alloy. Among the nanocomposites fabricated under various conditions, the highest yield strength was observed in the nanocomposite reinforced with alumina nanoparticles at a weight percentage of 1%, and the best tensile strength was found in the nanocomposite reinforced with alumina nanoparticles at a weight percentage of 0.5% under conditions where the alloy was modified with an admixture in a semi-solid state and cast with a low cooling rate.

Keywords


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Volume 4, Issue 3
Autumn 2024
Pages 479-496

  • Receive Date 13 August 2024
  • Revise Date 11 December 2024
  • Accept Date 19 December 2024