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Abstract:
Using state-of-the-art atomic scale super energy dispersive X-ray spectroscopy and high angle annular dark field imaging this study reveals the elemental partitioning preference between the gamma' and gamma phases in a Co-Al-W-Ti-Ta superalloy and the site preference of its alloying elements in the ordered L1(2) gamma' phase. A semi-quantitative analysis of atomic column compositions in the ordered L1(2) gamma' structure is provided. Co atoms were found to occupy the {1/2, 1/2, 0} face-center positions whereas Al, W, Ti and Ta atoms prefer to occupy the {0, 0, 0} cube corner positions in the L1(2) gamma phase. These findings agree well with predictions from first principles simulations in the literature.
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SCIENTIFIC REPORTS
ISSN: 2045-2322
Year: 2017
Volume: 7
4 . 6 0 0
JCR@2022
ESI Discipline: Multidisciplinary;
ESI HC Threshold:283
CAS Journal Grade:3
Cited Count:
WoS CC Cited Count: 12
SCOPUS Cited Count: 13
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 9
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