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<p>In the present paper, precision studies of the grain boundary (GB) structure in ultrafine-grained commercially pure nanoTi Grade 4 for biomedical implants produced by severe plastic deformation processing have been carried out. Currently, this material is of particular interest as a very promising material for medical applications. In the present article, attention is paid to the non-equilibrium structure of the GBs associated with the presence of grain boundary dislocations, which was revealed by high-resolution electron microscopy. Also, in accordance with atom probe tomography data, the GBs were found to contain a high volume of grain boundary segregations, primarily Fe atoms. The nature of the observed GB features in titanium with ultrafine grains is considered and their role in the unusual properties of this material, related to its superstrength and biomedical behavior, is discussed.</p> Graphical abstract <p></p>

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Grain boundary structure and segregation in nanostructured Ti Grade 4 for biomedical applications

  • 期刊论文

  • 发表日期：

    2025年12月10日

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  • Emil I. Usmanov,
  • Danil A. Sharafutdinov,
  • Roman R. Valiev,
  • Shiv Prakash Singh,
  • Yang Kong,
  • Ruslan Z. Valiev

摘要

In the present paper, precision studies of the grain boundary (GB) structure in ultrafine-grained commercially pure nanoTi Grade 4 for biomedical implants produced by severe plastic deformation processing have been carried out. Currently, this material is of particular interest as a very promising material for medical applications. In the present article, attention is paid to the non-equilibrium structure of the GBs associated with the presence of grain boundary dislocations, which was revealed by high-resolution electron microscopy. Also, in accordance with atom probe tomography data, the GBs were found to contain a high volume of grain boundary segregations, primarily Fe atoms. The nature of the observed GB features in titanium with ultrafine grains is considered and their role in the unusual properties of this material, related to its superstrength and biomedical behavior, is discussed.

Graphical abstract