Elastic properties of single phase γ-TiAl polycrystalline material at ambient and elevated temperature

The automotive industry and aerospace industry are two of the most important industrial sectors using γ-TiAl based alloys — a group of intermetallic materials with tetragonal structure. γ-TiAl based alloys offer advantages for use at working temperatures range between 500°C and 850°C and lead to weight reductions of up to 40% because of their low density, advanced mechanical properties and high oxidation and creep resistance. By reducing weight, especially in oscillating or rotating components of engines and turbines in the high temperature range, efficiency and power can be increased significantly. In current work the elastic properties of single phase γ-TiAl polycrystalline material were investigated at ambient and elevated temperature. The hkl dependent lattice strain was measured in situ at uni-axial compressive load using RTOF high-resolution neutron diffraction.