Mechanical properties and microstructures of low cost β titanium alloys for healthcare applications

B. Gunawarman, Mitsuo Niinomi, Toshikazu Akahori, Takayuki Souma, Masahiko Ikeda, Hiroyuki Toda

Research output: Contribution to journalConference articlepeer-review

55 Citations (Scopus)


Titanium alloys are the best choice of metallic materials for biomedical and healthcare applications due to the combination of their excellent mechanical properties and biocompatibility. However, the usage of titanium alloys is limited due to its high cost. In order to reduce their cost, two new titanium alloys, Ti-4.3Fe-7.1Cr (TFC alloy) and Ti-4.3Fe-7.1Cr-3.0Al (TFCA alloy), for healthcare goods such as wheelchairs have been recently developed using low cost ferro-chrom elements. The microstructure and mechanical properties of both alloys subjected to solution treatment in the beta field or thermomechanical treatment were investigated, and then evaluated for their potential to be used as wheelchair materials. The specific strength and fatigue ratio of TFC and TFCA alloys are much greater than those of the existing wheelchair materials. Unrecrystallized grains obtained in the alloys at low solution treatment temperature can be eliminated by increasing solution treatment temperature or by conducting thermomechanical treatment. The latter method is recommended because it also gives a better strength and ductility balance as a result, mainly, of grain refinement. However, TFCA alloy seems to have more potential to be used as wheelchair materials compared to TFC alloy because of its better workability and post thermomechanical treatment ductility.

Original languageEnglish
Pages (from-to)304-311
Number of pages8
JournalMaterials Science and Engineering C
Issue number3
Publication statusPublished - May 2005
Externally publishedYes
EventSelected Papers Presented at the Materials Science and Technology 2004 Meeting: Titanium for Biomedical, Dental, and Healthcare -
Duration: Sept 26 2004Sept 29 2004

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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