1. Main characteristics of TiAl

1.1 Benefits of using TiAl

The intermetallic compound TiAl possesses a number of characteristics that make it an increasingly essential structural material for the 650-850°C temperature range. This makes it the best candidate in turbomachinery for replacing titanium alloys in hot turbocharger sections, or nickel-based superalloys in low-pressure turbine stages (figure 1 ). Its melting temperature of 1,440°C ensures excellent mechanical strength retention at high temperatures. Its Young's modulus of 175 GPa enables us to expect stiffness gains of 45% over conventional materials, which, with a simultaneous weight reduction of 15%, means a potential...