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Effect of carburization on the mechanical properties of biomedical grade titanium alloys

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Abstract

Titanium cermets were successfully synthesized on the surface of biomedical grade titanium alloys by using sequential carburization method. The mechanical properties such as hardness, fracture toughness and plasticity were measured to estimate the potential application of titanium cermets. The results show that after carburization the surface hardness of titanium cermets was 778 HV, with a significant improvement of 128% compared with that of titanium alloys. In addition, the fracture toughness of titanium cermets was 21.5 × 106 Pa·m½, much higher than that of other ceramics. Furthermore, the analysis of the loading- unloading curve in the nanoindentation test also indicates that the plasticity of titanium cermet reached 32.1%, a relatively high value which illustrates the combination of the metal and ceramics properties. The results suggest that sequential carburization should be an efficient way to produce titanium cermets with hard surface, high toughness and plasticity.

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Authors and Affiliations

  1. Institute of Tribology and Reliability Engineering, School of Material Science and Engineering, China University of Mining and Technology, Xuzhou, 221116, P. R. China

    Yong Luo, Gang Cheng & Hongtao Liu

  2. Mechanical and Electrical Engineering Institute, Xuzhou Normal University, Xuzhou, 221116, P. R. China

    Haibo Jiang

Authors
  1. Yong Luo
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  2. Haibo Jiang
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  3. Gang Cheng
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  4. Hongtao Liu
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Correspondence to Yong Luo.

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Luo, Y., Jiang, H., Cheng, G. et al. Effect of carburization on the mechanical properties of biomedical grade titanium alloys. J Bionic Eng 8, 86–89 (2011). https://doi.org/10.1016/S1672-6529(11)60004-8

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