Table of Contents
Textures and Microstructures
Volume 19 (1992), Issue 3, Pages 175-188
http://dx.doi.org/10.1155/TSM.19.175

The Elastic Strain Ratio, the Lüders Strain Ratio and the Evolution of r-Value During Tensile Deformation

1Department of Metallurgical Engineering, McGill University, 3450 University St, Montreal, Quebec H3A 2A7, Canada
2National Research Council Canada, Industrial Materials Research Institute, Boucherville, Quebec J4B 6Y4, Canada

Received 17 September 1991

Copyright © 1992 Hindawi Publishing Corporation. 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

The elastic counterpart of the plastic strain ratio is derived from ultrasonic data measured on twenty commercial deep drawing steels. It is shown that the observed variations in plastic r are related to the evolution of texture, and are not affected either by the elastic range of deformation or by the propagation of Lüders bands. Further quantitative analysis suggests that the elastic strain ratio, determined non-destructively, can be used to predict plastic r-values by means of an empirical relationship.