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Oxygen-Induced Dynamic Embrittlement in Nickel-Base Superalloys

Published online by Cambridge University Press:  15 March 2011

C. J. McMahon Jr.  and
W. M. Kane
C. J. McMahon Jr.
Affiliation:
Department of Materials Science and Engineering University of Pennsylania Philadelphia, PA 19104
W. M. Kane
Affiliation:
Department of Materials Science and Engineering University of Pennsylania Philadelphia, PA 19104
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Abstract

The phenomenon of dynamic embrittlement involves the stress-induced diffusion of a surface- adsorbed embrittling element into grain boundaries, leading to time-dependent decohesion along these boundaries. Here, the state of our understanding of this generic type of brittle fracture is reviewed, with the focus on cracking of nickel-base superalloys caused by oxygen, including recent and new results on cracking in bicrystals, thermo-mechanical processing to reduce the susceptibility to dynamic embrittlement, and quench cracking.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 819: Symposia N/P – Interfacial Engineering for Optimized Properties III , 2004 , N2.4
Copyright
Copyright © Materials Research Society 2004

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