Creation of ribbon substrates with a sharp cube texture of copper and copper-nickel alloys additionally alloyed with iron and chromium

Abstract

The possibility of obtaining a perfect cube texture in thin ribbon made of binary copper-nickel alloys opens the possibility of using them as substrates in the technology of second-generation HTSC cables. The possibility of production of multicomponent alloys based on a binary Cu-30% Ni alloy additionally alloyed with elements (such as iron or chromium) that strengthen the fcc matrix has been shown. Optimum regimes of annealing have been determined, which make it possible to obtain a perfect biaxial texture with the content of cube grains {001}〈100〉 exceeding 97% in Cu-M and Cu-30Ni-M (M = Fe or Cr) alloys. In the tapes made of copper alloys with iron or chromium, the precipitation of disperse particles occurs in the process of cooling after recrystallization annealing, which improves the mechanical properties of the substrate. The estimation of the mechanical properties of the textured ribbons of binary and ternary copper alloys demonstrates a yield stress higher than that of the ribbons of pure copper by a factor of 2.5–4.5.