Table of Contents
Volume 2, Issue 1, Pages 17-34

Microbands in 80% Drawn Copper Single Crystals With <111> and <100> Starting Orientations

1National Institute for Researches in Inorganic Materials, Sakura-mura, Niihari-gun, Ibaraki 300-31, Japan
2Department of Metallurgy, Faculty of Engineering, University of Tokyo, Bunkyo-ku, Tokyo 113, Japan
3Institut für Metallkunde und Metallphysik der TU Clausthal, 3392 Clausthal-Zellerfeld, Grosser Bruch 23, Germany

Received 28 February 1975

Copyright © 1975 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.


Copper single crystals with the starting orientations <111> and <100> were drawn 80%. In the core region of the rods the orientations and the microstructures were investigated. The stable <111> crystal had a structure consisting of equiaxed cells and microbands which were formed parallel to the {111} planes with the exception of the {111} plane in the cross section of the rod. The <100> orientation was not entirely stable; the beginning of some orientational changes was observed at a high degree of deformation. In the parts with stable orientation a cylindrical cell structure was found with the long axes parallel to the drawing direction. Single microbands formed locally. Dislocation tangles around them finally developed, which lead to a change of the <100> orientation.