Table of Contents
ISRN Metallurgy
Volume 2012 (2012), Article ID 286765, 6 pages
http://dx.doi.org/10.5402/2012/286765
Research Article

A Kinetic Study of the Emerging of Grains and Block of Grains from the Inner Volume to the Free Surface of a Cd-Zn Alloy Superplastically Deformed

1Departamento de Estado Solido, Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20-364, 01000 Mexico City, DF, Mexico
2Departamento de Materiales (CBI), Universidad Autónoma Metropolitana-Azcapotzalco, Avenida San Pablo 180, Col. Reynosa, 02200 Mexico City, DF, Mexico
3Instituto de Investigación en Materiales, Universidad Nacional Autónoma de México, Apartado Postal 70-360, 04510 Mexico City, DF, Mexico

Received 28 September 2012; Accepted 7 November 2012

Academic Editors: R. Hebert and P. Lukac

Copyright © 2012 J. A. Montemayor-Aldrete 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

A local measurement technique for the study of the kinetic processes of emerging of grains or blocks of grains from the inner volume to the free surface of superplastic materials during deformation is presented and used for the case of the Cd-Zn eutectic alloy deformed at room temperature. This technique could be used to evaluate the approximate time of fracture due to fissure or cavitation growth in samples under superplastic deformation. In principle, this technique will be useful for the development of physical procedures, which allows retarding the process of formation of low mismatch angle, , between neighboring grains, process which gives place to blocks of grains which dynamically behave as units under the shear stress action. For materials with nanocrystalline structures, such processes are expected to be higher than those of the case of microcrystalline materials.