Young's modulus changeable β-type binary Ti-Cr alloys for spinal fixation applications

X. F. Zhao, M. Niinomi, M. Nakai, J. Hieda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Presently metallic rods that are used for spinal fixtures cannot meet the requirements of both surgeons and patients; surgeons require the material to have a high Young's modulus to suppress springback during the operation, whereas patients require the material to have a low Young's modulus to prevent the stress-shielding effect. In order to develop a novel biomedical titanium alloy with a changeable Young's modulus for spinal fixation applications via deformation-induced ω phase transformation. The effects of deformation-induced phases on the mechanical properties of metastable β-type Ti-xCr alloys were investigated. The experimental results indicate that the Young's moduli, tensile strength, and Vickers hardness of the Ti-(10-12)Cr alloys increase remarkably by cold rolling. The results of the microstructural observations of Ti-12Cr alloys using a transmission electron microscopy (TEM) show that deformation-induced ω phase transformation occurs during cold rolling. Therefore, the increase in Young's modulus of the alloys is attributed to the deformation-induced ω phase, which is formed in the alloy during cold rolling at room temperature.

Original languageEnglish
Title of host publicationMaterials Integration
PublisherTrans Tech Publications Ltd
Pages117-123
Number of pages7
ISBN (Print)9783037853764
DOIs
Publication statusPublished - 2012
EventInt. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011 - Sendai, Japan
Duration: 2011 Dec 12011 Dec 2

Publication series

NameKey Engineering Materials
Volume508
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

OtherInt. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011
CountryJapan
CitySendai
Period11/12/111/12/2

Keywords

  • Changeable Young's modulus
  • Deformation-induced ω phase transformation
  • Mechanical twinning
  • β-type Ti-Cr alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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