Journal of Phase Equilibria and Diffusion

, Volume 39, Issue 5, pp 549–561 | Cite as

Phase Equilibria of the Ti-Al-Nb System at 1000, 1100 and 1150 °C

  • Lin Li
  • Libin Liu
  • Ligang Zhang
  • Lijun Zeng
  • Yun Zhao
  • Weimin Bai
  • Yurong Jiang


1000, 1100 and 1150 °C isothermal sections of the Ti-Al-Nb system were studied using x-ray diffraction, scanning electron microscopy and electron probe microanalysis. A small island-like region of single β0 is present at 1000, but absent at 1100 and 1150 °C. γ1 is not a stable phase at 1000 and 1150 °C. Three three-phase fields (α2 + β0 + σ, β0 + σ + γ and α2 + β0 + γ) are identified in the 1000 °C isothermal section (30-60 at.% Ti content). The 1100 °C isothermal section is firstly studied completely. It includes six three-phase and thirteen two-phase fields. Two three-phase fields β + α2 + γ and β + σ + γ are identified in the isothermal section (30-60 at.% Ti content) at 1150 °C. These data are helpful to the fabrication of the TiAl and Ti2AlNb intermetallics.


intermetallics microstructure phase diagram TiAl alloy 



The work was financially supported by National Key Technologies R&D Program of China (Grant No. 2016YFB0701301), National Natural Science Foundation of China (Grant Numbers 51671218, 51501229). National Key Basic Research Program of China (973 Program) (Grant No. 2014CB644000).


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Copyright information

© ASM International 2018

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringCentral South UniversityChangshaPeople’s Republic of China
  2. 2.State Key Laboratory of Powder MetallurgyCentral South UniversityChangshaPeople’s Republic of China

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