Deformation induced changeable Young's modulus in ternary Ti-Cr-O alloys for spinal fixation applications

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

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

1 Citation (Scopus)

Abstract

A novel biomedical alloy with a changeable Young's modulus was developed in order to satisfy the requirements of both the patients and surgeons in spinal fixation operations. The alloy has not only a low Young's modulus to prevent a stress-shielding effect which benefits patients, but also a high Young's modulus to suppress springback for surgeons. In this study, the chromium and oxygen contents in ternary Ti-Cr-O alloys were optimized for achieving a large changeable Young's modulus with good mechanical properties. The Young's moduli of all the examined alloys increase by cold rolling, attributed to the deformation-induced co-phase transformation. This transformation can be suppressed by oxygen, but enhanced with lower chromium content. Among the examined alloys, the Ti-11Cr-0.2O alloy shows the largest changeable Young's modulus and a high tensile strength with an acceptable elongation in 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 to be a potential candidate for spinal fixation applications.

Original languageEnglish
Title of host publication8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8
PublisherJohn Wiley and Sons Inc.
Pages1635-1641
Number of pages7
ISBN (Print)9781632660008
Publication statusPublished - 2013 Jan 1
Event8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8 - Waikoloa, HI, United States
Duration: 2013 Aug 42013 Aug 9

Publication series

Name8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8
Volume2

Other

Other8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8
CountryUnited States
CityWaikoloa, HI
Period13/8/413/8/9

Keywords

  • Changeable Young's modulus
  • Deformation-induced ω-phase transformation
  • Springback
  • Ternary Ti-Cr-O alloy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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    Liu, H., Niinomi, M., Nakai, M., Hieda, J., & Cho, K. (2013). Deformation induced changeable Young's modulus in ternary Ti-Cr-O alloys for spinal fixation applications. In 8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8 (pp. 1635-1641). (8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8; Vol. 2). John Wiley and Sons Inc..