Micro Beam Orientation Determinations in Highly Deformed Cu - 12.5% Ni Alloy

Abstract

Convergent beam microdiffraction (CBD) techniques have been used to determine changes in orientation along and across subs truetural regions such as microbands, shear bands, crystallites, etc., in a heavily cold rolled Cu - 12.5% Ni alloy of high purity. The investigation is an extension of similar studies on copper and alpha brass (see eg. 1, 2 and 3).Pole figures and inverse pole figures determined by x-ray diffraction techniques have shown (see 4 and 5) that this alloy develops a copper-type deformation texture, although, more slowly than the pure metal since a substantial increase of the 422 reflection, arising from a (112) [111] end orientation, occurs only at deformations greater than 90% (ε ∼2.30).