Application of high toughness damage tolerance titanium alloy in engine blade

The typical high strength and high toughness titanium alloy is Ti62222S alloy developed in the United States. The alloy has good matching of strength, plasticity and fracture toughness. High fatigue crack growth resistance; With deep hardenability; High elastic modulus; It has good creep resistance at medium temperature, the fracture strength and yield strength at room temperature are more than 1300MPa and 1200MPa respectively, and its high temperature performance is also very good.

TC21(Ti-6Al-2Sn-2Zr-2Mo-2Cr-1Nb-0.1Si) is a kind of titanium alloy with high strength and high toughness and damage tolerance. The alloy has good matching of strength, plasticity, fracture toughness and crack growth rate. It is a kind of titanium alloy with high strength and high toughness damage tolerance structure which has great application prospect. The fracture toughness of large size bars produced by this alloy is up to 90Mpa.m1/2 under the premise of high strength at room temperature.