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

doi:10.1016/j.msea.2014.05.044

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

Design, Manufacturing And Engineering Management

Research output: Contribution to journal › Article › peer-review

31 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.

Original language	English
Pages (from-to)	201-208
Number of pages	8
Journal	Materials Science and Engineering A
Volume	613
DOIs	https://doi.org/10.1016/j.msea.2014.05.044
Publication status	Published - 8 Sep 2014

Keywords

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

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10.1016/j.msea.2014.05.044

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title = "Alloying and the micromechanics of Co-Al-W-X quaternary alloys",

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.",

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AU - Yan, Hui Yu

AU - Coakley, James

AU - Vorontsov, Vassili A.

AU - Jones, Nicholas G.

AU - Stone, Howard J.

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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KW - neutron scattering

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