Effects of TiB on the mechanical properties of Ti-29Nb-13Ta-4.6Zr alloy for use in biomedical applications

Xiu Song, Mitsuo Niinomi, Harumi Tsutsumi, Masaaki Nakai, Lei Wang

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


TiB2 was added to β-type Ti-29Nb-13Ta-4.6Zr (TNTZ) to enhance its mechanical properties and lower its Young's modulus, and the microstructures and mechanical properties of TNTZ with 0.05-0.50mass%B were investigated. The B concentration of TNTZ was controlled by varying the amount of added TiB2. TNTZ with 0.05-0.50mass%B consists of a β-phase with a small amount of TiB. As the B concentration increases, these TiB precipitates become increasingly efficient at preventing texture movement. The microstructure of TNTZ is refined by TiB, and the TNTZ grain size decreases as the B concentration increases. Moreover, the Young's moduli of TNTZ with 0.05-0.50mass%B remain below 70GPa, and are almost similar to that of TNTZ without TiB. The tensile strength of TNTZ with 0.05-0.50mass%B is slightly improved, and the optimum tensile strength is enhanced by approximately 8%. TNTZ with 0.10mass%B exhibits a good balance between tensile strength and the elongation. The results of this study are expected to contribute to the creation of a TNTZ-based material with improved mechanical properties and maintained Young's modulus that can be used as dental and orthopedic biomaterials.

Original languageEnglish
Pages (from-to)5600-5609
Number of pages10
JournalMaterials Science and Engineering A
Issue number16-17
Publication statusPublished - 2011 Jun 25


  • Tensile properties
  • Titanium diboride
  • Young's modulus
  • β-Type titanium alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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