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 | |
| Publication status | Published - 8 Sep 2014 |
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Keywords
- Co-Al-W superalloys
- elastic behaviour
- neutron scattering
- synchrotron X-ray diffraction
Cite this
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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 journal › Article
TY - JOUR
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
UR - http://www.scopus.com/inward/record.url?scp=84904309659&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2014.05.044
DO - 10.1016/j.msea.2014.05.044
M3 - Article
VL - 613
SP - 201
EP - 208
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
SN - 0921-5093
ER -