Elimination of Structure Inhomogeneities during Sheet Processing of beta-titanium Alloy

Abstract

The problem of retention non-recrystallized grains elongated along rolling direction during processing of sheets of alloy TS6 (Ti-11Cr-5Mo-6V-3A1) exists for long time. By means of m etallographic, texture analyses and EBSD method, the formation and the retention of such grains was shown to be connected with texture inhibition. A number of features affecting on texture inhibition were characterized and classified. Main technological approaches to eliminate mentioned above non-recrystallized grains during the processing of sheet semi products were developed. These approaches made possible to obtain sheets with fine structure (D < 100 mkm) and high strength ratio in heat treated conditions.