Microstructure and Microhardness of the Al-10Mg Alloy Processed by the Mechanical Alloying Technique

  • J. J. Sánchez-Cuevas Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria
  • J. Zárate-Medina Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria
  • O. Navarro Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México
  • C. Mercado-Zúñiga Tecnológico de Estudios Superiores de Coacalco
  • F. J. Reynoso-Marín Ingeniería en Nanotecnología, Universidad de La Ciénega del Estado de Michoacán de Ocampo
  • G. Rosas Instituto de Investigación en Metalurgia y Materiales, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria

Abstract

In this work, the Al-10Mg nanostructured alloy was synthesized by high-energy mechanical milling. Subsequently, the powders consolidated under a uniaxial pressing in the air. The as milled powders were analyzed using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and differential scanning calorimetry (DSC). SEM and XRD also characterized the sintered samples. Vickers microhardness of sintered Al-10Mg alloy was measured. SEM, XRD, and TEM characterizations show that the Al-10Mg alloy was synthesized after 10 h milling. The X-ray powder analysis of the structural parameters showed the increment with the time of the lattice parameter, strain as well as the solubility of Mg in Al. Besides, XRD and TEM studies showed that the crystallite size was reaching an average value of 19 nm after 10 h milling. XRD patterns of the all sintered specimens show the formation of the MgAl2O4 spinel phase. After powders compaction, the specimen sintered at 420 ºC for 2 h shows microhardness of 125 HV.

Published
2020-04-05
Section
Articles