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Journal of Materials Science

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20-10-2017 | Metals

Analysis of dislocation networks in crept single crystal nickel-base superalloy

Authors: O. Boualy, N. Clément, M. Benyoucef

Published in: Journal of Materials Science | Issue 4/2018

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Abstract

The creep behaviour at 1050 °C of <001> oriented MC2 single crystals is analysed by means of SEM and TEM observations. The γ–γ′ rafting process occurs rapidly and appears to be correlated with the establishment of a pseudo-stationary creep stage. The regular and stable networks are seen in the (001) interfaces. A detailed analysis of dislocation networks in these (001) interfaces shows that they are constituted by an association of hexagonal and square cells of a/2 <110> dislocations. The square part is unstable and gives rise to the systematic creation of a <001> dislocations included in the misfit dislocation network.

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Boualy O, Clément N, Benyoucef M, coming paper

Title: Analysis of dislocation networks in crept single crystal nickel-base superalloy
Authors: O. Boualy
N. Clément
M. Benyoucef
Publication date: 20-10-2017
Publisher: Springer US
Published in: Journal of Materials Science / Issue 4/2018
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-017-1699-9

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