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Erschienen in: Journal of Materials Engineering and Performance 11/2014

01.11.2014

Analysis of Grain Boundary Character in a Fine-Grained Nickel-Based Superalloy 718

verfasst von: L. S. Araujo, D. S. dos Santos, S. Godet, J. Dille, A. L. Pinto, L. H. de Almeida

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 11/2014

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Abstract

In the current work, sheets of superalloy 718 were processed via thermomechanical route by hot and cold rolling, followed by annealing below the δ phase solvus temperature and precipitation hardening to optimum strength. Grain boundary character distribution throughout the processing was mapped via EBSD and its evolution discussed. The results show that it is possible to process the alloy to a fine grain size obtaining concomitantly a considerably high proportion of special boundaries Σ3, Σ9, and Σ27. The precipitation of δ phase presented a strong grain refining role, without significantly impairing the twinning mechanism and, consequently, the Σ3, Σ9, and Σ27 boundary formations.
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Metadaten
Titel
Analysis of Grain Boundary Character in a Fine-Grained Nickel-Based Superalloy 718
verfasst von
L. S. Araujo
D. S. dos Santos
S. Godet
J. Dille
A. L. Pinto
L. H. de Almeida
Publikationsdatum
01.11.2014
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 11/2014
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-014-1172-8

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