Rolling and Recrystallization Textures of Ag-10 mol% Pd Alloy Substrate for Superconducting Tapes

Abstract

In order to demonstrate the effect of deformation temperature on texture formation in silver alloy sheet for superconducting tapes, the rolling and annealing textures of Ag-10 mol% Pd alloy rolled at the temperatures from À196 to 160 C and subsequently annealed were examined in detail.The rolling texture for all deformed specimens rolled at temperatures from À196 to 160 C consisted of a certain component near the Brass f110gh112i orientation with some weak components. During annealing procedure, the characteristic components of deformation texture disappeared quickly in specimens rolled at room temperature or À196 C but slowly in those warm-rolled at 120 C or 160 C. The Copper component was found to be formed by higher temperature annealing in specimens warm-rolled at 160 C and those rolled at room temperature. Above all, a single f112gh111i Copper type texture with high intensity in ODFs has been realized in three different specimens, which were rolled by 92% at room temperature or warm-rolled by 92% or 95% at 160 C and subsequently annealed as 200 C-10 min + 500 C-30 min + 800 C-180 min + 950 C-180 min respectively. From the experimental results obtained here, a metallurgical processing to get a sharp single orientation type texture in Ag-10 mol% Pd alloy was presented for the development of new technology on oriented superconducting substrate tapes.