BORRMANN TOPOGRAPHIC INVESTIGATION ON DISLOCATION CONFIGURATION IN WELL-ANNEALED AND LIGHTLY DEFORMED COPPER CRYSTALS

A. Merlini , F.W. Young

An investigation of the dislocations in well-annealed and lightly deformed copper crystals was made with Borrmann x-ray topography. The spatial arrangements of the lines were determined by stereoscopic views and by a vector analysis of the topographs. Burgers vectors were determined by application of the conditions of no contrast if g. b = 0 and b (g x n) = 0. The results were consistent with the hypothesis that b = < 110 >. No pure screw and few pure edge dislocations were observed in the annealed crystals, often the dislocations did not lie on {111} Planes or along simple crystallographic directions. It was concluded that climb was very important in establishing the dislocation configuration. Screw dislocations were prevalent in the lightly deformed crystal. Relative dislocation contrast and image widths were compared with [MATH] and [MATH] for both fresh and aged dislocations of all types. Although in some cases there was a qualitative correlation, it was clear that other factors than the above two quantities were important for the determination of image width and contrast.

Domaines: Articles anciens

A. Merlini, F.W. Young. BORRMANN TOPOGRAPHIC INVESTIGATION ON DISLOCATION CONFIGURATION IN WELL-ANNEALED AND LIGHTLY DEFORMED COPPER CRYSTALS. Journal de Physique Colloques, 1966, 27 (C3), pp.C3-219-C3-229. ⟨10.1051/jphyscol:1966329⟩. ⟨jpa-00213139⟩