Fabrication of ultrafine-grained Ti-(5-50wt.%)Al2O3 composites using high-pressure torsion

K. Edalati, H. Iwaoka, Z. Horita, M. Tanaka, K. Higashida, H. Fujiwara, K. Ameyama

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5 Citations (Scopus)

Abstract

Ti-matrix composites reinforced with Al2O3 fractions of up to 50 wt.% were fabricated by cold consolidation of powder mixtures using high-pressure torsion (HPT). The grain size of the Ti matrix was reduced to ∼ 100 nm. A relative density greater than ∼ 99 % was attained for composites containing up to 30 % Al2O3 following the rule of mixture. The Vickers microhardness increased with an increase in the Al 2O3 fraction but the bending stress and ductility decreased. The HPT-processed composites exhibited an abrupt increase in the hardness when they were annealed at 800-900 K, indicating a successful achievement of consolidation.

Original languageEnglish
Pages (from-to)85-92
Number of pages8
JournalKovove Materialy
Volume49
Issue number1
DOIs
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

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

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