Alloying and the micromechanics of Co-Al-W-X quaternary alloys

Hui Yu Yan, James Coakley, Vassili A. Vorontsov, Nicholas G. Jones, Howard J. Stone, David Dye

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The lattice misfit and diffraction elastic constants in hot rolled polycrystalline Co-7Al-5W-2Ta and Co-6Al-6W-2Ti (at.%) are measured using neutron and synchrotron X-ray diffraction. The misfit in the two alloys was found to be +0.67 and +0.59%, using neutron diffraction at HRPD. The misfit was found to increase with temperature, as in Ni superalloys. This implies that the amount of coherency strengthening increases with temperature. The diffraction elastic constants measured show that the γ ' phase is less stiff than the γ matrix in all orientations, which means that load shedding will occur to the γ phase.

LanguageEnglish
Pages201-208
Number of pages8
JournalMaterials Science and Engineering A
Volume613
DOIs
Publication statusPublished - 8 Sep 2014

Fingerprint

quaternary alloys
micromechanics
Micromechanics
Elastic constants
Alloying
alloying
Diffraction
Neutron diffraction
elastic properties
Synchrotrons
Superalloys
diffraction
Neutrons
heat resistant alloys
X ray diffraction
Temperature
neutron diffraction
synchrotrons
neutrons
temperature

Keywords

  • Co-Al-W superalloys
  • elastic behaviour
  • neutron scattering
  • synchrotron X-ray diffraction

Cite this

Yan, Hui Yu ; Coakley, James ; Vorontsov, Vassili A. ; Jones, Nicholas G. ; Stone, Howard J. ; Dye, David. / Alloying and the micromechanics of Co-Al-W-X quaternary alloys. In: Materials Science and Engineering A. 2014 ; Vol. 613. pp. 201-208.
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Alloying and the micromechanics of Co-Al-W-X quaternary alloys. / Yan, Hui Yu; Coakley, James; Vorontsov, Vassili A.; Jones, Nicholas G.; Stone, Howard J.; Dye, David.

In: Materials Science and Engineering A, Vol. 613, 08.09.2014, p. 201-208.

Research output: Contribution to journalArticle

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AU - Coakley, James

AU - Vorontsov, Vassili A.

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AU - Dye, David

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AB - The lattice misfit and diffraction elastic constants in hot rolled polycrystalline Co-7Al-5W-2Ta and Co-6Al-6W-2Ti (at.%) are measured using neutron and synchrotron X-ray diffraction. The misfit in the two alloys was found to be +0.67 and +0.59%, using neutron diffraction at HRPD. The misfit was found to increase with temperature, as in Ni superalloys. This implies that the amount of coherency strengthening increases with temperature. The diffraction elastic constants measured show that the γ ' phase is less stiff than the γ matrix in all orientations, which means that load shedding will occur to the γ phase.

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