Microstructures and mechanical properties of metastable Ti-30Zr-(Cr, Mo) alloys with changeable Young's modulus for spinal fixation applications

Xiaoli Zhao, Mitsuo Niinomi, Masaaki Nakai, Goro Miyamoto, Tadashi Furuhara

Research output: Contribution to journalArticlepeer-review

97 Citations (Scopus)

Abstract

In order to develop a novel alloy with a changeable Young's modulus for spinal fixation applications, we investigated the microstructures, Young's moduli, and tensile properties of metastable Ti-30Zr-(Cr, Mo) alloys subjected to solution treatment (ST) and cold rolling (CR). All the alloys comprise a β phase and small athermal ω phase, and they exhibit low Young's moduli after ST. During CR, deformation-induced phase transformation occurs in all the alloys. The change in Young's modulus after CR is highly dependent on the type of deformation-induced phase. The increase in Young's modulus after CR is attributed to the deformation-induced ω phase on {3 3 2} mechanical twinning. Ti-30Zr-3Cr-3Mo (3Cr3Mo), which exhibits excellent tensile properties and a changeable Young's modulus, shows a smaller springback than Ti-29Nb-13Ta-4.6Zr, a β-type titanium alloy expected to be useful in spinal fixation applications. Thus, 3Cr3Mo is a potential candidate for spinal fixation applications.

Original languageEnglish
Pages (from-to)3230-3236
Number of pages7
JournalActa Biomaterialia
Volume7
Issue number8
DOIs
Publication statusPublished - 2011 Aug

Keywords

  • Deformation-induced phase
  • Mechanical properties
  • Microstructure
  • Ti alloy
  • Young's modulus

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Biochemistry
  • Biomedical Engineering
  • Molecular Biology

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