B2 Grain Growth Behavior of a Ti-22Al-25Nb Alloy Fabricated by Hot Pressing Sintering

  • Jianbo Jia
  • Wenchao Liu
  • Yan Xu
  • Chen Chen
  • Yue Yang
  • Junting Luo
  • Kaifeng Zhang


Grain growth behavior of a powder metallurgy (P/M) Ti-22Al-25Nb alloy was investigated by applying a series of isothermal treatment tests over a wide range of temperatures and holding times. An isothermal treatment scheme was conducted in the B2 phase region (1070-1110 °C) and α2 + B2 phase region (1010-1050 °C) at holding times of 10, 30 min, 1, 2, and 3 h, respectively. The effects of temperature and holding time on the microstructure evolution and microhardness of the P/M Ti-22Al-25Nb alloy at elevated temperatures were evaluated using optical microscope, scanning electron microscope, x-ray diffraction, and Vickers hardness test techniques. The results revealed that the alloy’s treated microstructure was closely linked to temperature and holding time, respectively. The change law of B2 grain growth with holding time and temperature can be well interpreted by the Beck equation and Hillert equation, respectively. The B2 grain growth exponent n and activation energy Q were acquired based on experimental data in the α2 + B2 and B2 phase regions. In addition, the grain growth contour map for the P/M Ti-22Al-25Nb alloy was constructed to depict variations in B2 grain size based on holding time and temperature.


activation energy grain growth behavior grain growth exponent isothermal treatment tests P/M Ti-22Al-25Nb alloy 



The present research has been supported by the Natural Science Foundation of Hebei Province (Project No. E2016203157), the Science and Technology Foundation of Qinhuangdao City (Project No. 201602A008), the Doctor Foundation of Yanshan University (Project No. B936), and the Research Program for Young Teachers of Yanshan University (Project No. 15LGB003).


  1. 1.
    D. Banerjee, A.K. Gogia, T.K. Nandy, and V.A. Joshi, A New Ordered Orthorhombic Phase in a Ti3Al-Nb Alloy, Acta Metall., 1988, 36, p 871–882CrossRefGoogle Scholar
  2. 2.
    S. Emura, K. Tsuzak, and K. Tsuchiya, Improvement of Room Temperature Ductility for Mo and Fe Modified Ti2AlNb Alloy, Mater. Sci. Eng. A, 2010, 528, p 355–362CrossRefGoogle Scholar
  3. 3.
    C.J. Boehlert, B.S. Majumdar, V. Seetharaman, and D.B. Miracle, The Microstructural Evolution in Ti-Al-Nb O + Bcc Orthorhombic Alloys, Metall. Mater. Trans. A, 1999, 30, p 2305–2323CrossRefGoogle Scholar
  4. 4.
    K.H. Sim, G.F. Wang, J.M. Ju, J.L. Yang, and X. Li, Microstructure and Mechanical Properties of a Ti-22Al-25Nb Alloy Fabricated from Elemental Powders by Mechanical Alloying and Spark Plasma Sintering, J. Alloys Compd., 2017, 704, p 425–433CrossRefGoogle Scholar
  5. 5.
    J.L. Yang, G.F. Wang, X.Y. Jiao, X. Li, and C. Yang, Hot Deformation Behavior and Microstructural Evolution of Ti22Al25Nb1.0B Alloy Prepared by Elemental Powder Metallurgy, J. Alloys Compd., 2017, 695, p 1038–1044CrossRefGoogle Scholar
  6. 6.
    J.B. Jia, K.F. Zhang, and S.S. Jiang, Microstructure and Mechanical Properties of Ti-22Al-25Nb Alloy Fabricated by Vacuum Hot Pressing Sintering, Mater. Sci. Eng. A, 2014, 616, p 93–98CrossRefGoogle Scholar
  7. 7.
    P. Lin, Z.H. He, S.J. Yuan, and J. Shen, Tensile Deformation Behavior of Ti-22Al-25Nb Alloy at Elevated Temperatures, Mater. Sci. Eng. A, 2012, 556, p 617–624CrossRefGoogle Scholar
  8. 8.
    H.Z. Niu, Y.F. Chen, D.L. Zhang, Y.S. Zhang, J.W. Lu, W. Zhang, and P.X. Zhang, Fabrication of a Powder Metallurgy Ti2AlNb-Based Alloy by Spark Plasma Sintering and Associated Microstructure Optimization, Mater. Des., 2016, 89, p 823–829CrossRefGoogle Scholar
  9. 9.
    A.K. Gogia, T.K. Nandy, D. Banerjee, T. Carisey, J.L. Strudelb, and J.M. Franchetc, Microstructure and Mechanical Properties of Orthorhombic Alloys in the Ti-Al-Nb System, Intermetallics, 1998, 6, p 741–748CrossRefGoogle Scholar
  10. 10.
    C. Xue, W.D. Zeng, B. Xu, X.B. Liang, J.W. Zhang, and S.Q. Li, B2 Grain Growth and Particle Pinning Effect of Ti-22Al-25Nb Orthorhombic Intermetallic Alloy During Heating Process, Intermetallics, 2012, 2012(29), p 41–47CrossRefGoogle Scholar
  11. 11.
    C.M. Sellars and J.A. Whiteman, Recrystallization and Grain Growth in Hot Rolling, Metal science, 1979, 3–4, p 87–194Google Scholar
  12. 12.
    Q. Miao, L.X. Hu, X. Wang, and E.D. Wang, Grain Growth Kinetics of a Fine-Grained AZ31 Magnesium Alloy Produced by Hot Rolling, J. Alloys Compd., 2010, 493, p 87–90CrossRefGoogle Scholar
  13. 13.
    X.N. Peng, H.Z. Guo, C. Qin, Z.F. Shi, and Z.L. Zhao, Isothermal Beta Grain Growth Kinetics of TC4-DT Titanium Alloy Under Two Different Prior Processing Conditions: Deformed vs. Undeformed, Rare Metal Mater. Eng., 2014, 43, p 1855–1861CrossRefGoogle Scholar
  14. 14.
    X.F. Ding, J.P. Lin, L.Q. Zhang, and G.L. Chen, Effects of Heat Treatment on Microstructure of Directionally Solidified Ti-45Al-8Nb-(W, B, Y) Alloy, Trans. Nonferrous Met. Soc. China, 2011, 21, p 26–31CrossRefGoogle Scholar
  15. 15.
    S. Emura, A. Araoka, and M. Hagiwara, B2 Grain Size Refinement and Its Effect on Room Temperature Tensile Properties of a Ti-22Al-27Nb Orthorhombic Intermetallic Alloy, Scr. Mater., 2003, 48, p 629–634CrossRefGoogle Scholar
  16. 16.
    O.M. Ivasishin, S.V. Shevchenko, and S.L. Semiatin, Effect of Crystallographic Texture on the Isothermal Beta Grain-Growth Kinetics of Ti-6Al-4V, Mater. Sci. Eng. A, 2002, 332, p 343–350CrossRefGoogle Scholar
  17. 17.
    B. Cherukuri, R. Srinivasan, S. Tamirisakandala, and D.B. Miracle, The Influence of Trace Boron Addition on Grain Growth Kinetics of the Beta Phase in the Beta Titanium Alloy Ti-15Mo-2.6Nb-3Al-0.2Si, Scr. Mater., 2009, 60, p 496–499CrossRefGoogle Scholar
  18. 18.
    R. Staśko, H. Adrian, and A. Adrian, Effect of Nitrogen and Vanadium on Austenite Grain Growth Kinetics of a Low Alloy Steel, Mater. Charact., 2006, 56, p 340–347CrossRefGoogle Scholar
  19. 19.
    J. Moon, J. Lee, and C. Lee, Prediction for the Austenite Grain Size in the Presence of Growing Particles in the Weld HAZ of Ti-Microalloyed Steel, Mater. Sci. Eng. A, 2007, 459, p 40–46CrossRefGoogle Scholar
  20. 20.
    F.J. Gil, J.A. Picas, J.M. Manero, A. Forn, and J.A. Planell, Effect of the Addition of Palladium on Grain Growth Kinetics of Pure Titanium, J. Alloys Compd., 1997, 260, p 147–152CrossRefGoogle Scholar
  21. 21.
    J.E. Burke and D. Turnbull, Recrystallization and Grain Growth, Prog. Met. Phys., 1952, 3, p 220–244CrossRefGoogle Scholar
  22. 22.
    S. Renata, A. Henryk, and A. Anna, Effect of Nitrogen and Vanadium on Austenite Grain Growth Kinetics of a Low Alloy Steel, Mater. Charact., 2006, 56, p 340–347CrossRefGoogle Scholar

Copyright information

© ASM International 2018

Authors and Affiliations

  • Jianbo Jia
    • 1
    • 2
  • Wenchao Liu
    • 1
    • 2
  • Yan Xu
    • 1
    • 2
  • Chen Chen
    • 2
  • Yue Yang
    • 2
  • Junting Luo
    • 1
    • 3
  • Kaifeng Zhang
    • 4
  1. 1.Education Ministry Key Laboratory of Advanced Forging and Stamping Technology and ScienceYanshan UniversityQinhuangdaoChina
  2. 2.College of Mechanical EngineeringYanshan UniversityQinhuangdaoChina
  3. 3.State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdaoChina
  4. 4.National Key Laboratory for Precision Hot Processing of MetalsHarbin Institute of TechnologyHarbinChina

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