Mechanical properties of Ti-W alloys reinforced with TiC particles

Heeman Choe*, Susan Abkowitz, Stanley M. Abkowitz, David C. Dunand

*Corresponding author for this work

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

Composites consisting of a Ti-W solid-solution-strengthened matrix reinforced with TiC particles are produced by powder metallurgy. TiC additions increase strength but reduce ductility and matrix microhardness. Composites with 7.5 wt.% TiC show some tensile ductility (3-7%) but those with 15 wt.% TiC are brittle in tension. They are however strong and ductile in compression: Ti-15W/15TiC (wt.%) has a compressive yield strength exceeding 1200 MPa. This composite also shows tensile crack growth rates which are considerably faster than for pure titanium (by a factor 2) or Ti-15W (by a factor 2-6) and a fracture toughness which remains relatively high as compared to Ti-15W (21 vs. 34 MPa sqrt(m)).

Original languageEnglish (US)
Pages (from-to)703-710
Number of pages8
JournalMaterials Science and Engineering A
Volume485
Issue number1-2
DOIs
StatePublished - Jun 25 2008

Keywords

  • Composite
  • Mechanical properties
  • Orthopedic
  • Powder metallurgy
  • Titanium alloy
  • Titanium carbide

ASJC Scopus subject areas

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

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