Research Article Open Access

Fabrication of Ni, Si and Mg Supersaturated Solid Solutions in Al by Mechanical Alloying

A. Sedano1, A. Molina1, S.A. Serna1, R.A. Rodríguez-Díaz2 and A. Torres-Islas1
  • 1 Universidad Autónoma del Estado de Morelos, Mexico
  • 2 Universidad Popular Autónoma del Estado de Puebla, Mexico
American Journal of Engineering and Applied Sciences
Volume 13 No. 1, 2020, 61-71

DOI: https://doi.org/10.3844/ajeassp.2020.61.71

Submitted On: 4 November 2019 Published On: 23 February 2020

How to Cite: Sedano, A., Molina, A., Serna, S., Rodríguez-Díaz, R. & Torres-Islas, A. (2020). Fabrication of Ni, Si and Mg Supersaturated Solid Solutions in Al by Mechanical Alloying. American Journal of Engineering and Applied Sciences, 13(1), 61-71. https://doi.org/10.3844/ajeassp.2020.61.71

Abstract

In this work, a comparison between the synthesis process of nanostructured Al base alloys modified with Si, Ni and Mg and the formation of their respective supersaturated solid solution is presented. The samples were obtained via Mechanical Alloying (MA) at a speed of 300 RPM for 2, 5, 10, 20 and 30 h under an inert Ar atmosphere. Lattice parameter evolution, semiquantitative X-Ray Diffraction Analysis and SEM micrographs were correlated to determine the attained solubility in the Al matrix. The results showed that powder refinement and solubility rates are directly affected by the hardness of the solute element and the limiting solubility in equilibrium state respectively. Therefore the Al-Mg alloy achieved the highest solubility of the samples after 10 h of milling, meanwhile, the Al-Si alloy showed the lowest solubility even after 20 h of milling. Microstructural analyses by X-Ray Diffraction revealed that the lattice parameter showed different behavior depending on the alloy system, in some cases showing a deviation from the behavior predicted by Vegard's law. Finally, this work demonstrates that the successful synthesis of supersaturated solid solutions via MA is dependent on the alloy system as well as milling conditions.

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Keywords

  • Mechanical Alloying
  • Milling
  • Solid Solution
  • Aluminum Alloys
  • Powder Metallurgy