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Crystallographically-Necessary Constraints at Triple Junctions in Grain Boundary Engineered Alloys

Published online by Cambridge University Press:  15 March 2011

Valerie Randle
Valerie Randle*
Affiliation:
Materials Research Centre, School of Engineering, University of Wales Swansea, Swansea SA2 8PP, UK
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Abstract

Crystallographic characteristics of a large number of Σ3 boundaries have been investigated in a nickel superalloy. The results indicated that {111}, vicinal-to-{111} (within 10° of {111} planes) and not-{111} Σ3s were all present in the sample population. At Σ3/Σ3/Σ9 junctions a combination of one {111} and one vicinal-to-{111} Σ3 was more likely to occur than two {111} or two not-{111} Σ3s, and an explanation is proposed. An analysis of the interface planes for the not-{111} Σ3s indicated that more than half the boundaries in this category could not have {211}{211}, {774}{855}, {111}{511}, {001}{221} or {110}{411} planes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 819: Symposia N/P – Interfacial Engineering for Optimized Properties III , 2004 , N7.3
Copyright
Copyright © Materials Research Society 2004

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