Effect of solute oxygen on compressive fatigue strength of spinal fixation rods made of Ti-29Nb-13Ta-4.6Zr alloys

Yoon Seok Lee, Mitsuo Niinomi, Masaaki Nakai, Kengo Narita, Huihong Liu

Research output: Contribution to journalArticle

Abstract

In spinal fixation devices, the activity of the patient can cause fretting of the metal-to-metal contacts between the rod and plug, which may result in failures. In this study, compressive fatigue tests were conducted with rods made of Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) with oxygen contents of 0.06 mass% (06O) and 0.89 mass% (89O) and Ti-6Al-4V extra low interstitial alloy (Ti64) as comparison in both air and saline solution. The fatigue strength increases in the order of 06O<89O< Ti64 in both air and saline solution. These results indicate that solid-solution strengthening by oxygen improves the fretting fatigue resistance of the TNTZ rod.

Original languageEnglish
Pages (from-to)1993-1997
Number of pages5
JournalMaterials Transactions
Volume57
Issue number12
DOIs
Publication statusPublished - 2016

Keywords

  • Biomaterials
  • Fatigue
  • Fretting
  • Orthopedic device
  • Spinal fixation
  • Ti-29Nb-13Ta-4.6Zr
  • Ti-6Al-4V

ASJC Scopus subject areas

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

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