Microstructure and fracture characteristics in reactive sintering TiAl intermetallic compound

Mitsuo Niinomi, Shin Nakano, Takashi Hasegawa, Karuhisa Shibue

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Microstructure and fracture characteristics of TiAl intermetallic compound fabricated by reactive sintering process was investigated by microstructural observations, tensile tests and fracture toughness tests. The greater volume fraction of equiaxed γ grain gives greater clongation, and smaller 0.2% proof stress and tensile strength while the effect of the volume fracion of equiaxed γ grain on the fracture toughness is significantly small in duplex structural materials. The greater lamellar grain size give smaller 0.2% proof stress, tensile strength and clongation while that gives greater fracture toughness in fully lamellar structural material. The balance of strength and fracture toughness in this reactive sin-tering TiAl is the best in coarser fully lamellar structure, and is superior to that of the cast TiAl at a greater strength level.

Original languageEnglish
Pages (from-to)521-526
Number of pages6
JournalKeikinzoku/Journal of Japan Institute of Light Metals
Volume47
Issue number10
DOIs
Publication statusPublished - 1997 Oct

Keywords

  • Duplex structure
  • Fracture toughness
  • Lamellar structure
  • Mechanical properties
  • Reactive sintering TiAl

ASJC Scopus subject areas

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

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