Table of Contents
Textures and Microstructures
Volume 34, Issue 4, Pages 263-277
http://dx.doi.org/10.1155/TSM.34.263

Microstructure and Texture of in Situ Heavily Drawn Cu–Nb Composites

1Institute of Physics of Metals, Urals Div. of RAS, Ekaterinburg, Russia
2Bochvar All-Russian Institute of Inorganic Materials, Moscow, Russia
3Institute of Metal Physics, Urals Div. of RAS, GSP-170, S. Kovalevskaya Str., 18, Ekaterinburg 620219, Russia

Received 4 May 2000; Accepted 29 May 2000

Copyright © 2000 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

Heavily cold drawn in situ Cu–Nb composites have been investigated by transmission electron microscopy (TEM) and X-ray analysis. Dislocation density in the copper matrix has been shown to change only slightly in the investigated drawing ratio range because of the development of stage IV of deformation. In Nb filaments dislocation density in the investigated range at first increases with deformation and then drops at the highest drawing ratio. At intermediate deformation niobium grains consist of fine blocks separated by low-angle dislocation boundaries. At drawing, fibre texture develops in both phases, with 111 and 100 axis for the copper matrix and 110 axis for niobium filaments. Besides, niobium filaments acquire ribbon-like form, and their grains possess certain orientation, namely, in interlacing grains crystallographic {311}, {100} and {111} planes are parallel to each other and to the filament plane, i.e., the rolling texture with {311}110, {100}110 and {111}(110) components is forming within every filament.