Phase transformation and microstructure evolution of differently processed Ti–45Al–9Nb–Y alloy

Microstructure and tensile properties of hot fogred high Nb containing TiAl based alloy with initial near lamellar microstructure

“…In this way, external stress could induce α-γ phase transformation during hot forging of the Ti-44Al-8Nb-0.2W-0.2B-Y alloy. This phenomenon has also been reported by other scholars[3,31,32].…”

“…The yield stress is the highest when the loading axis is perpendicular to lamellar boundaries. In this direction, the α 2 phase is deformed in its hardest slip mode, and deformation must propagate through the lamellar interfaces, then this lamellar colony is in its hard orientation and will be remnant as RL structure [3][4][5][6][7][8][9][10][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. Thus, the α 2 phase significantly affects the RL structure.…”

“…Especially, high Nb containing TiAl based alloy has improved tensile strength, creep strength as well as oxidation resistance than the ordinary TiAl alloy, has been focused on in recent studies [3][4][5]. However, Nb addition leads to a significant primary segregation of the alloying elements in traditional high Nb containig TiAl based alloy [6,7].…”

Effects of laser shock peening on microstructure and residual stress evolution in Ti–45Al–2Cr–2Nb–0.2B alloy

“…Deformation texture evolution of TiAl under static and dynamic loading conditions has been studied in the past decades [34]. b110 N fiber and b 302N fiber texture components are evident under static compression or dynamic compression at room temperature.…”

Alloying Effects on the Phase Transformation Behaviors of the Orthorhombic and Ordered ω Phases in High Nb–TiAl Alloys

“…[1,2] Many ordered phases, like the B19, v', v", and v o phases, may form in high Nb-TiAl alloys mainly due to the Nb segregation, some of which have a great influence on the alloys' service performance. [1,4,[9][10][11][12][13][14][15][16][17] The B19 phase was firstly determined in a binary TiAl alloy quenched from disordered a-Ti phase by high-resolution microscopy and image simulation. [1,4,[9][10][11][12][13][14][15][16][17] The B19 phase was firstly determined in a binary TiAl alloy quenched from disordered a-Ti phase by high-resolution microscopy and image simulation.…”