Relationship between various deformation-induced products and mechanical properties in metastable Ti-30Zr-Mo alloys for biomedical applications

Xiaoli Zhao, Mitsuo Niinomi, Masaaki Nakai

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

Nowadays, there is a significant research focus on the development of bio-implant materials that have not only a low Young's modulus but also other unique characteristics such as a changeable Young's modulus and the ability to prevent calcium phosphate formation. Taking advantage of deformation-induced phases is an effective way to obtain the changeable Young's modulus. This study investigated the relationship between the various deformation-induced products and the mechanical properties-including Young's modulus, microstructure, and tensile properties-of Ti-30Zr-(5,6,7)mass%Mo alloys subjected to solution treatment (ST) and cold-rolling (CR). After ST, each alloy is composed of a β phase and a small amount of athermally formed ω phase, and exhibits a low Young's modulus. During CR, deformation-induced phase transformation occurs in all the alloys. The change in Young's modulus due to CR is highly dependent on the types of deformation-induced products. The decrease in Young's modulus due to CR is related to the deformation-induced α ' phase transformation accompanying with the disappearance of athermal ω phase, and the increase in Young's modulus is attributed to the deformation-induced ω phase, which mainly exists in {332} β mechanical twins.

Original languageEnglish
Pages (from-to)2009-2016
Number of pages8
JournalJournal of the Mechanical Behavior of Biomedical Materials
Volume4
Issue number8
DOIs
Publication statusPublished - 2011 Nov

Keywords

  • Changeable Young's modulus
  • Deformation-induced phase transformation
  • Titanium alloy
  • {332} mechanical twin
  • α phase
  • ω phase

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering
  • Mechanics of Materials

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