Development of high Zr-containing Ti-based alloys with low Young's modulus for use in removable implants

Xiaoli Zhao, Mitsuo Niinomi, Masaaki Nakai, Takuya Ishimoto, Takayoshi Nakano

Research output: Contribution to journalArticlepeer-review

87 Citations (Scopus)


This research focuses on the development of new titanium (Ti) alloys with a low Young's modulus for use in removable implants. In this study, Ti-30Zr alloy was selected as the base alloy, and the effect of Mo addition on the microstructures, Young's moduli, and tensile properties of Ti-30Zr-(0-8 wt.% Mo) alloys was investigated in this study to assess the mechanical compatibility of these alloys for biomedical applications. Further, the cytocompatibility of a part of the designed alloys was examined. The experimental results indicate that both the microstructures and the mechanical properties of the designed alloys are strongly affected by the Mo contents. The Ti-30Zr-(6, 7 wt.%) Mo alloys, located near the boundary of (β + ω)/β with a metastable structure, show a good combination of a low Young's modulus, high tensile strength, fairly large elongation. In addition, Ti-30Zr-7Mo alloy is highly cytocompatible.

Original languageEnglish
Pages (from-to)1436-1444
Number of pages9
JournalMaterials Science and Engineering C
Issue number7
Publication statusPublished - 2011 Oct 10


  • Cell culture test
  • High Zr-containing Ti alloys
  • Mechanical property
  • Microstructure

ASJC Scopus subject areas

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


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