Multi-step wrought processing of TiAl-based alloys

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...

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...

Mechanical Behaviour of Commercial Aluminium Wrought Alloys at Low Temperatures

ATOMISTIC STUDIES OF JOGGED SCREW DISLOCATIONS IN y-TIAL ALLOYS

The behavior of jogged screw dislocations in y-TiAl alloys has been investigated with large-scale molecular dynamics (MD) simuIations. We find a new mechanism for formation of pinning points in jogged screw dislocations. We also find that the critical height for the jogs in the +[i10] directions on the (001) plane to move nonconservatively is between 3ro and 4r0, where ro is the nearest neighbo...

Lead-Free Wrought Copper Alloys for Bushings and Sliding Elements