Elastic properties of as-solidified Ti-Zr binary alloys for biomedical applications

Takanobu Shiraishi, Kunio Yubuta, Toetsu Shishido, Nobuya Shinozaki

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Young's modulus (E), shear modulus (G), bulk modulus (K) and Poisson's ratio (ν) of Ti-Zr binary alloys containing 20, 40, 50, 60, 70 and 80 at% Zr and component pure metals (Ti, Zr) prepared by arc-melting followed by solidification process were determined precisely by ultrasonic sound velocity measurements. X-ray diffraction analysis showed that all the as-solidified alloys and pure metals were with a single-phase structure of the hexagonal close-packed lattice (martensitically formed α'-phase). The alloying addition of Zr to Ti effectively decreased both E and G values with their minimum values of 89.5± 1.0 GPa and 33.3±0.4 GPa, respectively, being recorded at the same composition Ti-60 at% Zr. On the other hand, K values decreased slightly when the concentration of Zr was increased from 20 to nearly 50 at% and further increases in Zr concentration did not change K values greatly. The observed variations of Young's modulus with Zr concentration in the entire range of composition were well interpreted in terms of density (ρ), Debye temperature (θD) and concentration of atoms (n) in each alloy. The quantity ρθD2n-2/3 was revealed to be a good measure in predicting the tendency of variations of Young's modulus with composition in this binary system.

Original languageEnglish
Pages (from-to)1986-1992
Number of pages7
JournalMaterials Transactions
Volume57
Issue number12
DOIs
Publication statusPublished - 2016 Jan 1

Keywords

  • Bulk modulus
  • Elastic property
  • Shear modulus
  • Titanium-zirconium alloy
  • Ultrasonic sound velocity
  • Young's modulus

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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