TB9(Ti-38644) titanium alloy Ti--3Al-8V-6Cr-4Mo-4Zr

Titanium has two kinds of homogeneous and heterogeneous crystals: titanium is a homogeneous isomer with a melting point of 1668°C, and a dense row of hexagonal lattice structure called a-titanium at lower than 882°C; and a body-centered cubic lattice structure called B-titanium at 882°C or above. The use of titanium's different characteristics of the above two structures, add the appropriate alloying elements, so that the phase transition temperature and component content gradually change and obtain different organizations of titanium alloys (titanium alloys).
Titanium alloys are divided into three kinds: (1) α titanium alloy (2) β titanium alloy (2) α + β titanium alloy. Among them, α-titanium alloy has the best machinability, α+β-titanium alloy is second, β-titanium alloy is the worst. α-titanium alloy is coded as TA, β-titanium alloy is coded as TB, and α+β-titanium alloy is coded as TC.

TB9 (Ti-38644) titanium alloy is a sub-stabilized β commercial titanium alloy developed by RMI in the 1960s, with a composition of Ti-3Al-8V-6Cr-4Mo-4Zr, which is an alloy composed of titanium as the basis for adding other elements.
The TB9 alloy has a large content of β-stabilizing elements, and the Mo content in this alloy is quite high, resulting in excellent corrosion resistance and resistance to salt stress corrosion and other properties. It is therefore amenable to a wide range of heat treatments, i.e., the alloy is given different strength-plasticity fits by changing the heat treatment specification.
TB9 alloy has the advantages of good plasticity, high strength and elasticity, good hardenability, and its hardened cross-section can reach 225mm. the alloy after solution aging treatment gold strength can reach 1200~1400MPa, fracture toughness of 58~66MPa.m%2, has high tensile strength and corrosion resistance, can be used as spring materials, TB9 titanium alloy is widely used in aviation springs, high-strength TB9 titanium alloy is widely used in aerospace springs, high-strength fasteners, torsion bar foil honeycomb structure, aircraft carrier ejection device and oil drilling and other fields.