Evading the strength-ductility trade-off at room temperature and achieving ultrahigh plasticity at 800℃ in a TiAl alloy

G Zheng, B Tang, S Zhao, WY Wang, X Chen, L Zhu… - Acta Materialia, 2022 - Elsevier
Improving the room temperature (RT) strength/ductility and hot-working capacity based on
lamellar microstructures is of great significance for the practical application of TiAl alloys …

Breaking the high-temperature strength-ductility trade-off in TiAl alloys through microstructural optimization

G Zheng, B Tang, S Zhao, J Wang, Y Xie… - International Journal of …, 2023 - Elsevier
Designing a novel microstructure with higher strength-ductility than lamellar microstructure
(LM), which has been considered the most valuable engineering application in the service …

Microstructural control and mechanical properties of dual-phase TiAl alloys

CT Liu, PJ Maziasz - Intermetallics, 1998 - Elsevier
This paper summarizes our recent work on the effects of microstructural features on the
mechanical properties of TiAl alloys prepared by powder and ingot metallurgy. TiAl alloys …

Formation of core-shell-like structure in β-solidified TiAl alloy and its effect on hot workability

Y Yu, H Kou, Y Wang, M Jia, X Xu, Z Zhang, Y Wang… - Acta Materialia, 2023 - Elsevier
Understanding how phase evolves from its parent phase is critical to control the transforming
microstructures and thus material performance. TiAl alloys exhibit lightweight and excellent …

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

J Ding, M Zhang, Y Liang, Y Ren, C Dong, J Lin - Acta Materialia, 2018 - Elsevier
A pre-deformation process was employed for a TiAl alloy via high-temperature torsion, in
which the stability of the constituent phases was tailored, resulting in enhanced hardening …

Tensile properties and fracture toughness of TiAl alloys with controlled microstructures

CT Liu, JH Schneibel, PJ Maziasz, JL Wright… - Intermetallics, 1996 - Elsevier
The objective of this study is to improve the mechanical properties by careful control of both
microstructure and alloy additions in two-phase TiAl alloys based on Ti-47Al-2Cr-2Nb (at%) …

Lattice and phase strain evolution during tensile loading of an intermetallic, multi-phase γ-TiAl based alloy

P Erdely, P Staron, E Maawad, N Schell, H Clemens… - Acta materialia, 2018 - Elsevier
Intermetallic γ-TiAl based alloys are promising materials for lightweight high-temperature
applications, but their limited room temperature ductility poses an obstacle to the exploitation …

Atypical pathways for lamellar and twinning transformations in rapidly solidified TiAl alloy

X Zhang, C Li, M Wu, Z Ye, Q Wang, J Gu - Acta Materialia, 2022 - Elsevier
Additively manufactured alloys undergo a rapid solidification process followed by thermal
cycles, which promotes the microstructures to return to equilibrium. The microstructural …

Refining of coarse lamellar microstructure of TiAl alloys by rapid heat treatment

JN Wang, K Xie - Intermetallics, 2000 - Elsevier
It is now well known that the room temperature tensile yield strength (σy), fracture strength
(σf), and ductility (δ) of TiAl alloys increase with decreasing the colony size (d) of the fully …

The effect of vanadium on the microstructure and mechanical properties of TiAl alloy fabricated by twin-wire directed energy deposition-arc

W Zhou, C Shen, X Hua, L Wang, Y Zhang, F Li… - Additive …, 2023 - Elsevier
In recent years, additive manufacturing of titanium aluminide has become an attractive
research area. In order to improve microstructure and mechanical properties, element …