Microstructures and mechanical properties of Co3(Al,W) with the LI2 structure

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

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)

Abstract

Microstructures and deformation behavior of γ/γ' Co-Al-W single-crystals and γ'-Co3(Al,W) polycrystals have been investigated. Single crystals with the γ/γ' two-phase microstructure with a large volume fraction of the γ' phase are obtained by the Bridgman method. These single crystals exhibit anomalies in yield stress in compression at temperatures above 700 °C. Polycrystalline Co3(Al,W) alloys can be rolled in ambient atmosphere such that the nominal thickness was reduced by 40%. The values of tensile elongation obtained for the polycrystalline Co3(Al,W) alloys in air is slightly smaller than that obtained in vacuum, indicating that the Co3(Al,W) alloys are not severely susceptible to the environmental embrittlement in air.

Original languageEnglish
Pages (from-to)221-226
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume1128
Publication statusPublished - 2009 Nov 17
Externally publishedYes
Event2008 MRS Fall Meeting - Boston, MA, United States
Duration: 2008 Dec 22008 Dec 5

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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