Effect of Oxygen Content of Powders on Previous Particle Boundaries in Hot Isostatic Pressed TiAl Alloy

  • Yufeng Liu
  • Zhou Li
  • Na Liu
  • Liang Zheng
  • Wenyong Xu
Conference paper


Argon gas atomized Ti–43Al–9V–0.3Y alloy powders with oxygen contents of 1150 and 550 ppm respectively were hot isostatic pressed (HIPed) at 1200 °C and 150 MPa for 3 h to obtain full density compacts. The effect of powders oxygen content on previous particle boundaries (PPBs) was investigated. Results show that PPBs only were observed in the HIPed compact produced from the powders with 1150 ppm oxygen content, and higher oxygen content promoted the formation of PPBs in TiAl alloy. SEM and TEM analysis proved that the microstructure at PPBs was α2/γ lamellar. Oxygen was the α2 phase stabilizer, and it restricted the α → γ transformation but drived the α → α2 + γ eutectoid process in which the lamellar formed.


Oxygen content Previous particle boundaries TiAl alloy Hot isostatic pressing 



This research was funded by the National Natural Science Foundation of China under Contract No. 51434007, No. U1435203 and No. 51301157.


  1. 1.
    Y.W. Kim, Development of beta gamma alloys: opening robust processing and greater application potential for TiAl-based alloys, In: Kim Y-W, Morris D, Yang R, Leyens C, editors, Structural aluminides for elevated temperatures, Warrendale: The Minerals & Materials, 2008, p. 215.Google Scholar
  2. 2.
    J.S. Kim, Y.H. Lee, Y.W. Kim, et al, High Temperature Deformation Behavior of Beta-Gamma TiAl Alloy[J]. Materials Science Forum. 2007:1531–1536.Google Scholar
  3. 3.
    Y.Y. Chen, F.T. Kong, Recent developments in engineering γ-TiAl intermetallics, J. Transactions of Nonferrous Metals Society of China, 2002, 12(4):605–609.Google Scholar
  4. 4.
    F.T. Kong, N. Cui, Y.Y. Chen, et al, The hot deformation behavior of Ti-43Al-9V-Y alloy, J. Bibliographie: 144 Réf, 2013:53–56.Google Scholar
  5. 5.
    Y.Y. Chen, F.T. Kong, J. Han, et al, Influence of yttrium on microstructure, mechanical properties and deformability of Ti-43Al-9V alloy[J]. Intermetallics, 2005, 13(3):263–266.Google Scholar
  6. 6.
    L. Wang, Microstructure and Forming Mechanism of Powder Metallurgy Ti-6Al-4 V[J]. Aerospace Materials & Technology, 2012, 42(1):46–49.Google Scholar
  7. 7.
    L. Chang, W. Sun, Y. Cui, et al, Preparation of Hot-Isostatic-Pressed Powders Metallurgy Superalloy Inconel 718 free of Prior Particle Boundaries[J]. Materials Science & Engineering A, 2016.Google Scholar
  8. 8.
    W. Gang, Z. Zhuo, L. Chang, et al, Characterization of TiAl pre-alloyed powders and its densification microstructure [J]. Acta Metallurgica Sinica, 2011, 47(10):1263–1269.Google Scholar
  9. 9.
    P.V.D. Heide, Appendix B: Binding Energies (B.E. XPS, or B.E. XRF) of the Elements[M]// X-Ray Photoelectron Spectroscopy: An Introduction to Principles and Practices. John Wiley & Sons, Inc. 2011:171–176.Google Scholar
  10. 10.
    W.C. Xu, H. Zhang, D.B. Shan, Promoting the mechanical properties of Ti42Al9V0.3Y alloy by hot extrusion in the α + β phase region, J. Journal of Zhejiang University-SCIENCE A, 2010, 11(10):738–743.Google Scholar
  11. 11.
    F.T. Kong, Y.Y. Chen, W. Wang, et al, Microstructures and mechanical properties of hot-pack rolled Ti-43Al-9 V-Y alloy sheet[J]. Transactions of Nonferrous Metals Society of China, 2009, 19(5):1126–1130.Google Scholar
  12. 12.
    H.Y. Kim, K. Maruyama, Stability of lamellar microstructure of hard orientated PST crystal of TiAl alloy[J]. Acta Materialia, 2003, 51(8):2191–2204.Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Yufeng Liu
    • 1
  • Zhou Li
    • 1
  • Na Liu
    • 1
  • Liang Zheng
    • 1
  • Wenyong Xu
    • 1
  1. 1.Science and Technology of Advanced High Temperature Structural Materials LaboratoryBeijing Institute of Aeronautical MaterialsBeijingChina

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