Pilot processing and microstructure control of high Nb containing TiAl alloy

Numerical investigation of room-temperature deformation behavior of a duplex type γTiAl alloy using a multi-scale modeling approach

“…Today, knowledge of the alloy chemistry and processing techniques has been greatly improved, promoting the development of new-generation TiAl alloys. For example, adding Nb in the alloy, the phase stability of the Ti-Al alloy system can be modified, which leads to significant refinement of microstructure, enhancing room-temperature ductility and strength [4,5]. Also, improvement in the solid solution due to Nb addition increases the oxidation and creep resistance remarkably [4,6,7].…”

Characterization of the invariant reaction involving the L, η, γ and σ phases in the Ti–Al–Nb system

“…The alloying of c-TiAl with Nb has been shown to improve the mechanical properties [3,4]. Furthermore, significant addition of Nb, which stabilizes the ductile bodycentered cubic (bcc) solid solution b phase, improves the high-temperature formability of b-modified TiAl alloys [5,6].…”

High temperature deformation behaviors of a high Nb containing TiAl alloy

“…Many valuable conclusions, including oxidation resistance [1], phase relationships and phase diagram construction [2], microstructure evolution [3], relationships of microstructures and properties [4] and workability at high temperatures [5], have been reported previously. It is worth noting that the TiAl alloys with Al content ranging from 45 to 49 at.% and Nb content ranging from 8 to10 at.% exhibit excellent balanced properties.…”