A new concept of hip joint stem and its fabrication using metastable TiNbSn alloy

Taek Kyun Jung, Hyo Soo Lee, Satoshi Semboshi, Naoya Masahashi, Tadasu Abumiya, Shuji Hanada

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


Cold worked (Ti-35%Nb)-4%Sn alloy rods were locally heated to investigate the gradation of mechanical properties and develop an advanced Ti alloy stem for application as an artificial hip joint. Cold groove rolling was found to decrease Young's modulus, but subsequent cold swaging increased Young's modulus and tensile strength. Heating one edge of the cold worked rods resulted in the tensile strength and Young's modulus increasing significantly in the heated zone; the increase varied depending on the distance from the heated zone. The increase in tensile strength was attributed to the ω precipitation and the additional microstructure refinement by reverse transformation of α″ to β. We could successfully fabricate an advanced hip joint stem with a tensile strength of 1.3 GPa in the proximal portion and Young's modulus of 43 GPa in the distal portion.

Original languageEnglish
Pages (from-to)S582-S585
JournalJournal of Alloys and Compounds
Issue numberSUPPL.1
Publication statusPublished - 2012 Sep 25


  • Cold groove rolling
  • Cold swaging
  • Local heating
  • Tensile strength
  • TiNbSn alloys
  • Young's modulus

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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