摘要
Compared with traditional titanium alloys,TiAl alloys have higher modulus and high temperature bearing capacity.Their densities are only 3.85-4.20 g·cm^-3,which is far lower than that of nickel based superalloys,and their specific strength is close to or even higher than that of nickel based superalloys.Therefore,TiAl alloys have become one of the potential materials in aerospace,automobile and other fields.In addition to the application in the field of rotating parts,such as aerospace engine blades,discs and aviation bearings,TiAl alloys are attempted to be used in the fields of non-rotating parts,such as exhaust valves,fuselages.
