Table of Contents
Textures and Microstructures
Volume 28, Issue 1-2, Pages 1-15
http://dx.doi.org/10.1155/TSM.28.1

Neutron Texture Investigations on Natural Mt. Isa Chalcopyrite Ore – Part II: Preferred Orientation of Chalcopyrite After Different Experimental Deformation Conditions

1lnstitut für Mineralogie und Lagerstättenlehre, RWTH Aachen, Wüllnerstr. 2, Aachen D-52056, Germany
21nstitut für Metallkunde und Metallphysik, TU Clausthal, Außenstelle GKSS Forschungszentrum, Postfach 1160, Geesthacht D-21494, Germany

Received 10 September 1995

Copyright © 1996 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

Natural chalcopyrite samples from Mt. Isa, Australia were axially shortened at a constant confining pressure of 300 (400) MPa, at different temperatures from 25–450°C, in the strain rate range of 31056108sec1. Neutron diffraction texture analyses of all deformed samples were carried out and compared to the preferred orientation before the experimental deformation.

The preferred orientation of the experimentally undeformed samples consists of three main orientation components, which become weaker with deformation at temperatures to 200°C. One or two new components (A, B) develop with the c-axes perpendicular to the principal strain direction. At a deformation temperature of 250°C and to slower strain rates at 200°C the relics of the original components are stronger. After deformation at temperatures of 300°C to 450°C in general two different types of preferred orientation were detected. One type (2NF) shows two different new components (A*, C), the original components are completely dissolved. The other type (IN) shows the original components partially more concentrated, especially to slower strain rates, and shifting into the directions of the new components of the type 2NF.