Microstructure and Properties of TiAl-Based Alloys Melted in Graphite Crucible

Superplastic behaviour and mechanical properties of two phase TiAl alloys

High temperature plastic flow properties of two phase TiAl alloys containing 45 to 49 at.%Al have been investigated in thermo-mechanically grain refined materials in order to clarify the favourable microstructure and chemical composition for TiAl based superplastic materials. Grain sizes of thermomechanical treated materials and their grain size stability during subsequent high temperature defo...

TiAl-BASED ALLOYS: PRESENT STATUS AND FUTURE PERSPECTIVES

Intermetallic TiAl-based alloys represent an important class of high temperature structural materials providing a unique set of physical and mechanical properties that can lead to substantial payoffs in aircraft engines, industrial gas turbines and automotive industry. The present status and future perspectives of TiAl-based alloys are reviewed from the point of view of alloy design, processing...

First-principles Study of the Mechanical Properties of TiAl-Based Alloys

TiAl-based alloys have been suggested as advanced high-temperature structural materials replacing the Ni-based superalloys, due to their low density, high modulus, good oxidation resistance and creep resistance. However, their poor ductility and toughness at low temperature limits their applications in industry. Generally, controlling the microstructure and alloying elements are the most useful...

Thermal-cycling creep of g-TiAl-based alloys

In two-phase TiAl-based alloys, the coexisting 2 and phases exhibit a thermal expansion mismatch, so that increased creep rates during thermal cycling may be expected. Creep deformation of two g-TiAl-based alloys was investigated during thermal cycles between 900 and 300 or 350 C with applied tensile stresses of 32.5 or 37.0 MPa. Measured thermal cycling creep rates were compared with isotherma...

Effect of Aluminum on the Microstructure and Mechanical Properties of Austempered Ductile Iron Alloys