Advanced mechanical properties of powder metallurgy commercially pure titanium with a high oxygen concentration


Oxygen is known to have a significant impact on the strength of Ti alloys, whereas it can also reduce the ductility substantially. Thus, the usage of oxygen to strengthen Ti is restricted in the industry. In this study, we rekindled the research of oxygen behavior in Ti with the purpose of developing Ti alloys with high strength and suitable ductility by using no expensive and poisonous element. To this end, experiments of producing high performance commercially pure Ti using only oxygen solid solution were carried out. The oxygen element was introduced into the Ti by two different powder metallurgy methods. The microstructural examination and mechanical test were performed for the samples, which indicated a strong hardening effect of oxygen in spite of the processing routes. Most importantly, the results suggested that a high elongation to failure of over 20% can still be obtained in the samples having yield stress over 800 MPa, up to an oxygen content of 0.8 wt%, which is far beyond the previously recognized limit.

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  1. 1.

    D. Banerjee and J.C. Williams: Perspectives on titanium science and technology. Acta Mater. 61, 844–879 (2013).

    CAS  Article  Google Scholar 

  2. 2.

    M. Geetha, A.K. Singh, R. Asokamani, and A.K. Gogia: Ti based biomaterials, the ultimate choice for orthopaedic implants—A review. Prog. Mater. Sci. 54, 397–425 (2009).

    CAS  Article  Google Scholar 

  3. 3.

    B.P. Bewlay, M. Weimer, T. Kelly, A. Suzuki, and P.R. Subramanian: The science, technology, and implementation of TiAl alloys in commercial aircraft engines. MRS Online Proc. Libr. 1516, 49–58 (2013).

    Article  Google Scholar 

  4. 4.

    G. Chen, Y. Peng, G. Zheng, Z. Qi, M. Wang, H. Yu, C. Dong, and C.T. Liu: Polysynthetic twinned TiAl single crystals for high-temperature applications. Nat. Mater. 15, 876–881 (2016).

    CAS  Article  Google Scholar 

  5. 5.

    A.M. Khorasani, M. Goldberg, E.H. Doeven, and G. Littlefair: Titanium in biomedical applications-properties and fabrication: A review. J. Biomater. Tissue Eng. 5, 593–619 (2015).

    Article  Google Scholar 

  6. 6.

    M. Özcan and C. Hämmerle: Titanium as a reconstruction and implant material in dentistry: Advantages and pitfalls. Materials 5, 1528 (2012).

    Article  Google Scholar 

  7. 7.

    D. Kuroda, M. Niinomi, M. Morinaga, Y. Kato, and T. Yashiro: Design and mechanical properties of new β type titanium alloys for implant materials. Mater. Sci. Eng., A 243, 244–249 (1998).

    Article  Google Scholar 

  8. 8.

    L.M. Kang, C. Yang, F. Wang, X.X. Li, D.Z. Zhu, W.W. Zhang, W.P. Chen, and Y. Huan: Designing ultrafine lamellar eutectic structure in bimodal titanium alloys by semi-solid sintering. J. Alloys Compd. 702, 51–59 (2017).

    CAS  Article  Google Scholar 

  9. 9.

    R.R. Boyer: An overview on the use of titanium in the aerospace industry. Mater. Sci. Eng., A 213, 103–114 (1996).

    Article  Google Scholar 

  10. 10.

    J.C. Williams and E.A. Starke, Jr.: Progress in structural materials for aerospace systems. Acta Mater. 51, 5775–5799 (2003).

    CAS  Article  Google Scholar 

  11. 11.

    J.C. Williams, A.W. Sommer, and P.P. Tung: The influence of oxygen concentration on the internal stress and dislocation arrangements in α titanium. Metall. Trans. 3, 2979–2984 (1972).

    CAS  Article  Google Scholar 

  12. 12.

    H. Conrad: Effect of interstitial solutes on the strength and ductility of titanium. Prog. Mater. Sci. 26, 123–403 (1981).

    CAS  Article  Google Scholar 

  13. 13.

    C. Ouchi, H. Iizumi, and S. Mitao: Effects of ultra-high purification and addition of interstitial elements on properties of pure titanium and titanium alloy. Mater. Sci. Eng., A 243, 186–195 (1998).

    Article  Google Scholar 

  14. 14.

    L-P. Lefebvre, E. Baril, and L. de Camaret: The effect of oxygen, nitrogen and carbon on the microstructure and compression properties of titanium foams. J. Mater. Res. 28, 2453–2460 (2013).

    CAS  Article  Google Scholar 

  15. 15.

    Q. Yu, L. Qi, T. Tsuru, R. Traylor, D. Rugg, J.W. Morris, M. Asta, D.C. Chrzan, and A.M. Minor: Origin of dramatic oxygen solute strengthening effect in titanium. Science 347, 635–639 (2015).

    CAS  Article  Google Scholar 

  16. 16.

    R.I. Jaffee, H.R. Ogden, and D.J. Maykuth: Alloys of titanium with carbon, oxygen and nitrogen. Trans. AIME 188, 1261–1266 (1950).

    CAS  Google Scholar 

  17. 17.

    M. Yan, W. Xu, M.S. Dargusch, H.P. Tang, M. Brandt, and M. Qian: Review of effect of oxygen on room temperature ductility of titanium and titanium alloys. Powder Metall. 57, 251–257 (2014).

    CAS  Article  Google Scholar 

  18. 18.

    M. Yan, M.S. Dargusch, T. Ebel, and M. Qian: A transmission electron microscopy and three-dimensional atom probe study of the oxygen-induced fine microstructural features in as-sintered Ti–6Al–4V and their impacts on ductility. Acta Mater. 68, 196–206 (2014).

    CAS  Article  Google Scholar 

  19. 19.

    B. Sun, S. Li, H. Imai, T. Mimoto, J. Umeda, and K. Kondoh: Fabrication of high-strength Ti materials by in-process solid solution strengthening of oxygen via P/M methods. Mater. Sci. Eng., A 563, 95–100 (2013).

    CAS  Article  Google Scholar 

  20. 20.

    K. Katsuyoshi, B. Sun, S. Li, I. Hisashi, and U. Junko: Experimental and theoretical analysis of nitrogen solid-solution strengthening of PM titanium. Anglais 50, 35–40 (2014).

    Google Scholar 

  21. 21.

    T. Mimoto, J. Umeda, and K. Kondoh: Titanium powders via gas-solid direct reaction process and mechanical properties of their extruded materials. Mater. Trans. 56, 1153–1158 (2015).

    CAS  Article  Google Scholar 

  22. 22.

    W.J. Joost, S. Ankem, and M.M. Kuklja: Interaction between oxygen interstitials and deformation twins in alpha-titanium. Acta Mater. 105, 44–51 (2016).

    CAS  Article  Google Scholar 

  23. 23.

    R.J. Lederich, S.M.L. Sastry, J.E. O’Neal, and B.B. Rath: The effect of grain size on yield stress and work hardening of polycrystalline titanium at 295 and 575 K. Mater. Sci. Eng. 33, 183–188 (1978).

    CAS  Article  Google Scholar 

  24. 24.

    Y.K. Li, F. Liu, G.P. Zheng, D. Pan, Y.H. Zhao, and Y.M. Wang: Strength scaling law, deformation kinetics and mechanisms of nanostructured Ti. Mater. Sci. Eng., A 573, 141–147 (2013).

    CAS  Article  Google Scholar 

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This work was partially supported by Japan Science and Technology Agency under Industry-Academia Collaborative R&D Program “Heterogeneous Structure Control: Toward Innovative Development of Metallic Structural Materials” and JSPS KAKENHI Grant Number JP16H02408.

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Correspondence to Jianghua Shen.

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Chen, B., Shen, J., Ye, X. et al. Advanced mechanical properties of powder metallurgy commercially pure titanium with a high oxygen concentration. Journal of Materials Research 32, 3769–3776 (2017).

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