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^*

^*Corresponding author for this work

Design, Manufacturing And Engineering Management

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

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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
Early online date	22 May 2014
DOIs	https://doi.org/10.1016/j.msea.2014.05.044
Publication status	Published - 8 Sept 2014

Funding

The authors would like to acknowledge the financial support provided by Rolls-Royce plc and EPSRC (UK) under the DHPA scheme (HY) and by Grants EP/H004882/1 (DD, NGJ, JC, VAV) and EP/H500375/1 (HJS, NGJ). Useful conversations with Mark Hardy at Rolls-Royce plc. are also acknowledged, as is the provision of beamtime by STFC (UK) at Diamond and ISIS and at SNS, ORNL by the Scientific User Facilities Division, Office of Basic Energy Sciences, Department of Energy (USA).

Keywords

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

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10.1016/j.msea.2014.05.044

Yan-etal-MSE-2014-Alloying-and-the-micromechanics-of-Co-Al-W-X-quaternary-alloysAccepted author manuscript, 2.03 MBLicence: CC BY-NC-ND 4.0

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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.",

keywords = "Co-Al-W superalloys, elastic behaviour, neutron scattering, synchrotron X-ray diffraction",

author = "Hui-Yu Yan and James Coakley and Vorontsov, {Vassili A.} and Jones, {Nicholas G.} and Stone, {Howard J.} and David Dye",

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doi = "10.1016/j.msea.2014.05.044",

language = "English",

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journal = "Materials Science and Engineering A",

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T1 - Alloying and the micromechanics of Co-Al-W-X quaternary alloys

AU - Yan, Hui-Yu

AU - Coakley, James

AU - Vorontsov, Vassili A.

AU - Jones, Nicholas G.

AU - Stone, Howard J.

AU - Dye, David

PY - 2014/9/8

Y1 - 2014/9/8

N2 - 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.

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.

KW - Co-Al-W superalloys

KW - elastic behaviour

KW - neutron scattering

KW - synchrotron X-ray diffraction

U2 - 10.1016/j.msea.2014.05.044

DO - 10.1016/j.msea.2014.05.044

M3 - Article

AN - SCOPUS:84904309659

SN - 0921-5093

VL - 613

SP - 201

EP - 208

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

ER -

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

Abstract

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Keywords

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