Формирование ультрамелкозернистой структуры в сплаве Ti-45 МАС.% Nb методом abc-прессования и прокатки по различным деформационным режимам

Abstract

The investigation results of microstructure, phase composition, mechanical properties (microhardness) of bioinert binary alloys Ti-45 wt .%Nb (Ti-45Nb) in ultrafine-grained state were represented. The ultrafinegrained structure was produced by two-stage severe plastic deformation (SPD) method, which included the multiple abc-pressing and multi-pass rolling in grooved rolls for various deformation modes. The ultrafinegrained structure with average structural elements size of 0,15µm is formed in alloys as a result of SPD included 9 abc-pressing and the multi-pass rolling of the alloy in the initial state. Ultrafine-grained structure provides high level of mechanical properties (microhardness).