Microstructure and deformation mechanisms in nanocrystalline Ni-Fe. Part I. Microstructure

We investigate various microstructural features of nanocrystalline electrodeposited Ni-Fe with a nominal iron content of 50% and compare them with the well-known nanocrystalline Ni system. In-depth electron microscopy analysis reveals the existence of large strain variations in the grain interior. Three-dimensional atom probe studies demonstrate no significant segregation to grain boundaries. However, significant deviations from a perfect chemically disordered system are found, which can be related to compositional variations of 5% over length scales of only a few nanometres. Finally, X-ray diffraction measurements suggest higher dislocation and twin density in Ni-Fe compared to Ni. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.


Published in:
Acta Materialia, 61, 15, 5835-5845
Year:
2013
Publisher:
Oxford, Pergamon-Elsevier Science Ltd
ISSN:
1359-6454
Keywords:
Laboratories:




 Record created 2013-10-01, last modified 2018-01-28


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