Microstructure and mechanical property of α+β type Ti-(0∼10)mass%v-(0.5∼1)mass%O alloys

Kyosuke Ueda, Tatsuya Kobayashi, Takayuki Narushima

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The microstructure and mechanical properties of the α + β type Ti-V-O alloys with high oxygen content were investigated. Ti-(0∼10)mass%V-(0.5, 0.75, 1.0)mass%O alloy ingots were prepared using arc melting and hot rolling at 1373 K and 1073 K. The alloys were heat-treated at temperatures varying from 923 K to 1323 K for 3.6 ks under Ar flow. The β transus of the alloys was experimentally determined, and its value decreased with increasing V content and decreasing oxygen content in the alloy. Athermal co was detected in the alloys with 6, 8 and 10 mass%V content and 0.5, 0.75 and 1 mass%O content after heat treatment at low temperatures in the range of 923 to 1123 K, wherein the V content in the β phase was higher than 12 mass%. The formation of the athermal ω led to the increase in hardness and decrease in the elongation and reduction of area of the alloys. Based on the investigation results, it was suggested that the Ti-4 mass%V-(0.5∼0.75)mass%O alloy had an excellent balance between strength and ductility.

Original languageEnglish
Pages (from-to)60-65
Number of pages6
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume80
Issue number1
DOIs
Publication statusPublished - 2016

Keywords

  • Athermal ω
  • Oxygen
  • Tensile test
  • Vanadium
  • α + β type titanium alloy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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