Super elastic functional β titanium alloy with low young's modulus for biomedical applications

M. Niinomi, T. Akahori, Y. Hattori, K. Morikaw, T. Kasugu, H. Fukui, A. Suzuki, K. Kyo, S. Niwa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The low modulus β type titanium alloy, Ti-29Nb-13Ta-4.6Zr, was designed, and then the practical level ingot of the alloy was successfully fabricated by Levicast method. The mechanical and biological compatibilities, and super elastic behavior of the alloys were investigated in this study. The mechanical performance of tensile properties and fatigue strength of the alloy are equal to or greater than those of conventional biomedical Ti-6Al-4V ELI. Young's modulus of the alloy is much lower than that of Ti-6Al-4V ELI, and increases with the precipitation of α phase or ω phase in the β matrix phase. The compatibility of the alloy with bone is excellent. Low modulus of the alloy is effective to enhance the healing of bone fracture and remodeling of bone. Super elastic behavior is observed in Ti-29Nb-13Ta-4.6Zr conducted with short time solution treatment after heavy cold working. Total elastic strain in that case is around 2.8 %. The mechanism of the super elastic behavior of Ti-29Nb-13Ta-4.6Zr is still unclear.

Original languageEnglish
Title of host publicationTitanium, Niobium, Zirconium, and Tantalum for Medical and Surgical Applications
PublisherAmerican Society for Testing and Materials
Pages135-150
Number of pages16
Edition1471
ISBN (Print)0803134975, 9780803134973
Publication statusPublished - 2006
EventASTM Symposiun on Titanium, Niobium, Zirconium, and Tantalum for Medical and Surgical Applications - Washington, DC, United States
Duration: 2005 Nov 92005 Nov 10

Publication series

NameASTM Special Technical Publication
Number1471
ISSN (Print)0066-0558

Other

OtherASTM Symposiun on Titanium, Niobium, Zirconium, and Tantalum for Medical and Surgical Applications
CountryUnited States
CityWashington, DC
Period05/11/905/11/10

Keywords

  • Biocompatibility
  • Biomedical application
  • Low modulus
  • Super elastic behavior
  • Ti-29Nb-13Ta-4.6Zr
  • β-type titanium alloy

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Niinomi, M., Akahori, T., Hattori, Y., Morikaw, K., Kasugu, T., Fukui, H., Suzuki, A., Kyo, K., & Niwa, S. (2006). Super elastic functional β titanium alloy with low young's modulus for biomedical applications. In Titanium, Niobium, Zirconium, and Tantalum for Medical and Surgical Applications (1471 ed., pp. 135-150). (ASTM Special Technical Publication; No. 1471). American Society for Testing and Materials.