Effects of contact pressure and surface roughness on fretting fatigue characteristics of a high workable Ti-4.5%Al-3%V-2%Mo-2%Fe alloy

Junji Takeda, Mitsuo Niinomi, Toshikazu Akahori, Yoshiki Suzuki

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The effects of contact pressure and surface roughness on fretting fatigue strength of Ti-4.5Al-3V-2Mo-2Fe conducted with annealing at 1123K were investigated in this study. Fretting fatigue tests in the low and high cycle fatigue life region of the alloy annealed at 1123K were carried out at each contact pressure of 10, 15, 30, 45, 75, 105 and 153 MPa. The fretting fatigue crack initiation mechanism is changed by contact pressure. At a contact pressure of 15 MPa, fretting fatigue life tends to be very low in each fatigue life region. The tangential force tends to increase with increasing contact pressure in each fatigue life region. Contrary to this trend, the tangential force coefficient tends to decrease with increasing contact pressure in each fatigue life region. The fretting fatigue life of the alloy buff-polished to produce mirror surface tends to increase about 20% and 10% in the low and high cycle fatigue life region, respectively as compared with the alloy wet-polished by water-proof emery paper up to #1000.

Original languageEnglish
Pages (from-to)563-569
Number of pages7
JournalKeikinzoku/Journal of Japan Institute of Light Metals
Volume53
Issue number12
DOIs
Publication statusPublished - 2003 Dec

Keywords

  • Contact pressure
  • Fretting fatigue
  • Surface roughness
  • Tangential force
  • Titanium alloy

ASJC Scopus subject areas

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

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