Selective laser melting enabled additive manufacturing of Ti–22Al–25Nb intermetallic: Excellent combination of strength and ductility, and unique microstructural features associated

Phase transformation and microstructure control of Ti2AlNb-based alloys: A review

Hot pack rolling nearly lamellar Ti-44Al-8Nb-(W, B, Y) alloy with different rolling reductions: Lamellar colonies evolution and tensile properties

Enhanced high-temperature tensile property by gradient twin structure of duplex high-Nb-containing TiAl alloy

Plastic deformation mechanism and interaction of B2, α2, and O phases in Ti22Al25Nb alloy at room temperature

Investigation of the phase transformations in Ti-22Al-25Nb alloy

γ-Phase transformation, dynamic recrystallization and texture of a forged TiAl-based alloy based on plane strain compression at elevated temperature

High temperature deformation behaviors of the unhydrogenated and hydrogenated Ti-46Al-2V-1Cr-0.3Ni (at%) alloys were investigated in the temperature range 1050–1200 °C and strain rate range 0.001–1 s−1. The flow stress of the hydrogenated alloy was lower than that of the unhydrogenated alloy, which was mainly attributed to hydrogen-promoted lamellar decomposition, twinning and dynamic recrystallization. Processing maps of the unhydrogenated and hydrogenated alloys were constructed. The stability domain of the hydrogenated alloy was enlarged in comparison with that of the unhydrogenated alloy, meaning hydrogen enhanced the hot workability of the Ti-46Al-2V-1Cr-0.3Ni alloy. Hydrogen activated slip systems so that lamellar bending more easily occurred in the hydrogenated alloy, which made inter-lamellar fracture convert into trans-lamellar fracture. Therefore, crack propagation was restrained in the hydrogenated alloy during hot deformation. The critical strain of the hydrogenated alloy was less than those of the unhydrogenated alloy, meaning the dynamic recrystallization occurred earlier in the hydrogenated alloy. γ-phase discontinuous dynamic recrystallization was promoted due to hydrogen addition, leading to a consumption of plentiful dislocations, which restrained continuous dynamic recrystallization to some extent. Hydrogen-promoted discontinuous dynamic recrystallization was mainly attributed to hydrogen-promoted lamellar decomposition, twinning, and hydrogen-decreased stacking fault energy.

Positive influence of hydrogen on the hot workability and dynamic recrystallization of a γ-TiAl based alloy

The effect of hydrogen on phase transformation and mechanical properties of a β containing γ–TiAl based alloy

Effect of hydrogen on the microstructural evolution of a γ-TiAl based alloy

Daosheng Wen

Papers

Investigation of the phase transformations in Ti-22Al-25Nb alloy

γ-Phase transformation, dynamic recrystallization and texture of a forged TiAl-based alloy based on plane strain compression at elevated temperature

Positive influence of hydrogen on the hot workability and dynamic recrystallization of a γ-TiAl based alloy

The effect of hydrogen on phase transformation and mechanical properties of a β containing γ–TiAl based alloy

Effect of hydrogen on the microstructural evolution of a γ-TiAl based alloy