Dendrite spacings in directionally solidified superalloy PWA-1480

Primary dendrite spacings and side-branch coarsening kinetics were examined in specimens of the single-crystal multicomponent commercial superalloy PWA-1480, which were directionally solidified in a positive thermal gradient. The experimentally observed dependence of primary dendrite spacings and si...

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 1991-02, Vol.132, p.195-201
Hauptverfasser: Vijayakumar, M., Tewari, S.N., Lee, James E., Curreri, P.A.
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Sprache:eng
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Zusammenfassung:Primary dendrite spacings and side-branch coarsening kinetics were examined in specimens of the single-crystal multicomponent commercial superalloy PWA-1480, which were directionally solidified in a positive thermal gradient. The experimentally observed dependence of primary dendrite spacings and side-branch coarsening kinetics on growth rate and thermal gradient were in agreement with the behavior predicted by analytical models developed for binary alloys.
ISSN:0921-5093
1873-4936
DOI:10.1016/0921-5093(91)90375-W