Table of Contents
Journal of Metallurgy
Volume 2014, Article ID 345945, 17 pages
http://dx.doi.org/10.1155/2014/345945
Research Article

Experimental Study of the Interaction between Recrystallization and Precipitation Processes of an AA8011 Commercial Alloy

1Grupo Física de Metales, Departamento de Física, Núcleo de Sucre, Universidad de Oriente, Cumaná 6101, Venezuela
2IDECYT, Universidad Simón Rodríguez, Caracas 1060, Venezuela
3Instituto de Investigaciones de Biomedicina y Ciencias Aplicadas (IIBCA), Universidad de Oriente, Cumaná 6101, Venezuela

Received 16 July 2013; Revised 4 December 2013; Accepted 6 December 2013; Published 22 January 2014

Academic Editor: B. S. Murty

Copyright © 2014 Ney José Luiggi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Phase changes in a commercial AA8011 alloy from different initial microstructure conditions were studied using thermoelectric power (), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM) techniques with the purpose of obtaining evidence of the interaction between recovery-precipitation and recrystallization-precipitation processes occurring during nonisothermal heating at different rates. Thermoelectric power and its thermal derivative reflect this evidence by a displacement of the characteristic precipitation peaks, the recovery and recrystallization contributions remaining masked by the strong incidence of the iron precipitation on that property, while DSC measurements detect the emergence of new peaks not observed on thermograms of homogenized samples. An exhaustive study of these peaks permits direct differentiation between precipitation and recovery-recrystallization contributions. TEM confirms the interaction between both processes by means of local observations.