Physical and mechanical properties of Co3(Al,W) with the L1 2 structure in single and polycrystalline forms

Haruyuki Inui, Takashi Oohashi, Norihiko L. Okamoto, Kyosuke Kishida, Katsushi Tanaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


The physical and mechanical properties of Co3(Al,W) with the L12 structure have been investigated both in single and polycrystalline forms. The values of all the three independent single-crystal elastic constants and polycrystalline elastic constants of Co3(Al,W) experimentally determined by resonance ultrasound spectroscopy at liquid helium temperature are 15-25% larger than those of Ni3(Al,Ta) but are considerably smaller than those previously calculated. When judged from the values of Poisson's ratio, Cauchy pressure and Gh (shear modulus)/Bh (bulk modulus), the ductility of Co3(Al,W) is expected to be sufficiently high. Indeed, the value of tensile elongation obtained in air is as large as 28 %, which is far larger than that obtained in Ni3Al polycrystals under similar conditions.

Original languageEnglish
Title of host publicationMaterials Structure and Micromechanics of Fracture VI
PublisherTrans Tech Publications Ltd
Number of pages6
ISBN (Print)9783037850060
Publication statusPublished - 2011
Externally publishedYes

Publication series

NameKey Engineering Materials
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795


  • Cuboidal precipitate
  • Elastic property
  • Microstructure
  • Strength

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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