Effects of alloying elements on the temperature dependence of yield stress in Ll2-Co3(Al,W)

Zhenghao M.T. Chin, Norihiko L. Okamoto, Haruyuki Inui

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

The effects of alloying elements (Ni/Ta) on the temperature dependence of yield stress in Co3(Al,W) with the Ll2 structure have been investigated through compression tests of nearly single-phase polycrystalline alloys in the temperature range between room temperature to 1, 473K. Compared with a ternary Co3(Al,W), a Ni/Ta-added Co3(Al,W) alloy exhibits a higher γ' solvus temperature and lower onset temperature of the yield stress anomaly (positive temperature dependence of yield stress), suggesting that the CSF energy is increased by Ni/Ta addition. As a consequence, the high-temperature strength in Co3(Al,W) is considerably enhanced.

Original languageEnglish
Title of host publicationAdvanced Structural and Functional Intermetallic-Based Alloys
EditorsI. Baker, M. Heilmaier, K. Kishida, M. Mills, S. Miura
PublisherMaterials Research Society
Pages25-30
Number of pages6
ISBN (Electronic)9781510806344
DOIs
Publication statusPublished - 2015
Event2014 MRS Fall Meeting - Boston, United States
Duration: 2014 Nov 302014 Dec 5

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1760
ISSN (Print)0272-9172

Conference

Conference2014 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston
Period14/11/3014/12/5

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