Development of changeable young's modulus with good mechanical properties in? type ti-cr-o alloys

Huihong Liu, Mitsuo Niinomi, Masaaki Nakai, Junko Hieda, Ken Cho

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


A novel ?-type titanium alloy with a changeable Young's modulus, that is, with a low Young's modulus to prevent the stress-shielding effect for patients and a high Young's modulus to suppress springback for surgeons, should be developed in order to satisfy the conflicting requirements of both the patients and surgeons in spinal fixation operations. In this study, the oxygen content in ternary Ti-11Cr-O alloys was optimized in order to achieve a large changeable Young's modulus with good mechanical properties for spinal fixation applications. The increase in Young's moduli of all the examined alloys by cold rolling is attributed to the deformation-induced ?-phase transformation which is suppressed by oxygen. Among the examined alloys, the Ti-11Cr-0.2O alloy exhibits the largest changeable Young's modulus and a high tensile strength with an acceptable plasticity under both solution-treated (ST) and cold-rolled (CR) conditions. Therefore, the Ti-11Cr-0.2O alloy, which shows a good balance among a changeable Young's modulus, high tensile strength and good plasticity, is considered a potential candidate for spinal fixation applications.

Original languageEnglish
Title of host publicationRecent Highlights in Advanced Materials
PublisherTrans Tech Publications Ltd
Number of pages8
ISBN (Print)9783037858295
Publication statusPublished - 2014
Event2nd International Congress on Advanced Materials, AM 2013 - Zhenjiang, China
Duration: 2013 May 162013 May 19

Publication series

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


Other2nd International Congress on Advanced Materials, AM 2013


  • Changeable young's modulus
  • Deformation-induced ?-phase transformation
  • Springback
  • Ternary ti-cr-o alloy

ASJC Scopus subject areas

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


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