TITANIUM ALLOY WITH HIGH RESISTANCE TO INTERCRYSTALLINE CORROSION Russian patent published in 2012 - IPC C22C14/00 C22F1/18 

FIELD: metallurgy.

SUBSTANCE: versions of titanium alloys are proposed. Titanium alloy contains the following, wt %: Ni 0.35 to 0.55, Pd 0.01 to 0.02, Ru 0.02 to 0.04%, Cr 0.1 to 0.2, titanium and inevitable impurities are the rest. After final rolling and final annealing at temperature of 600-725°C the titanium alloy includes phases rich in nickel; at that, each phase rich in nickel is the phase containing nickel which is more by 10 times or more than average content of nickel in titanium alloy matrix. Phases rich in nickel are extended in rolling direction so that a row is formed; set of such rows is extended essentially parallel in transverse direction. Besides, phases rich in nickel contain Ti₂Ni.

EFFECT: titanium alloy minimises development of intercrystalline corrosion even in special media, where intercrystalline corrosion can be easily developed.

2 cl, 6 dwg, 2 tbl, 2 ex