Development of New Titanium-Molybdenum Alloys with Changeable Young's Modulus for Spinal Fixture Devices

• ZHAO Xingfeng

  Graduate School of Engineering, Tohoku University

• NIINOMI Mitsuo

  Institute for Materials Research, Tohoku University

• NAKAI Masaaki

  Institute for Materials Research, Tohoku University

• HIEDA Junko

  Institute for Materials Research, Tohoku University

抄録

Metallic implant rods that are used to design spinal fixtures should have a Young's modulus that is not only sufficiently low to prevent stress shielding for the patient but also sufficiently high to suppress springback for the surgeon. Therefore, there is a need for novel titanium alloys with good biocompatibility and a changeable Young's modulus. Molybdenum is non-toxic, and Ti-Mo alloys possess good biocompatibility. In metastable β-type Ti-Mo alloys, an ω phase can be introduced by deformation at room temperature. This study investigated the effects of deformation-induced phases on the mechanical properties of a metastable β-type Ti-16Mo alloy. The experimental results indicate that the Young's modulus, tensile strength, and Vickers hardness are increased remarkably by cold rolling. The microstructural observation result by transmission electron microscopy (TEM) shows that the deformation-induced ω phase transformation occurs during cold rolling in the Ti-16Mo alloy. Therefore, the increase in Young's modulus of the alloy after cold rolling at room temperature can be attributed to a deformation-induced ω phase.

収録刊行物

• JSMME

  JSMME 6 (6), 695-700, 2012

  一般社団法人 日本機械学会

キーワード

• Biomaterials
• β-type Ti-Mo Alloys
• Changeable Young's Modulus
• Deformation-Induced Phases

詳細情報

• CRID: 1390001205264822144
• NII論文ID: 130002072527
• DOI: 10.1299/jmmp.6.695
• BIBCODE: 2012JSMME...6..695Z
• ISSN: 18809871
• Web Site: https://www.jstage.jst.go.jp/article/jmmp/6/6/6_695/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可