Long crack growth behavior of implant material Ti-5Al-2.5Fe in air and simulated body environment related to microstructure

Mitsuo Niinomi, Akira Saga, Kei Ichi Fukunaga

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The fatigue crack propagation behavior of Ti-5Al-2.5Fe with various microstructures for biomedical applications was investigated in air and in a simulated body environment, Ringer's solution, in comparison with that of Ti-6Al-4V ELI and that of SUS 316L stainless steel. The crack propagation rate, da/dN, of Ti-5Al-2.5Fe in the case of each microstructure is greater than that of the Widmanstatten α structure in Ti-6Al-4V ELI in air whereas da/dN of Ti-5Al-2.5Fe is nearly equal to that of the equiaxed α structure in Ti-6Al-4V ELI in air when da/dN is plotted versus the nominal cyclic stress intensity factor range, ΔK. da/dN of the equiaxed α structure and that of the Widmanstatten α structure in Ti-5Al-2.5Fe are nearly the same in air when da/dN is plotted versus ΔK. da/dN of Ti-5Al-2.5Fe is nearly equal to that of SUS 316L stainless steel in the Paris Law region, whereas da/dN of Ti-5Al-2.5Fe is greater than that of SUS 316L stainless steel in the threshold region in air, when da/dN is plotted versus ΔK. da/dN of Ti-5Al-2.5Fe or Ti-6Al-4V ELI is nearly the same in air and in Ringer's solution when da/dN is plotted versus the effective cyclic stress intensity factor range, ΔKeff, whereas da/dN of Ti-5Al-2.5Fe or Ti-6Al-4V ELI is greater in Ringer's solution than in air when da/dN is plotted versus ΔK.

Original languageEnglish
Pages (from-to)887-897
Number of pages11
JournalInternational Journal of Fatigue
Volume22
Issue number10
DOIs
Publication statusPublished - 2000 Nov

ASJC Scopus subject areas

  • Modelling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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