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Thermomechanical properties and fatigue of nanocrystalline Ni/Cu electrodeposits

Published online by Cambridge University Press:  15 March 2011

Olivier Arnould ,
Olivier Hubert  and
François Hild
Olivier Arnould
Affiliation:
LMT-Cachan, ENS Cachan/CNRS UMR 8535/Université Paris VI 61, avenue du Président Wilson, 94235 Cachan Cedex, France
Olivier Hubert
Affiliation:
LMT-Cachan, ENS Cachan/CNRS UMR 8535/Université Paris VI 61, avenue du Président Wilson, 94235 Cachan Cedex, France
François Hild
Affiliation:
LMT-Cachan, ENS Cachan/CNRS UMR 8535/Université Paris VI 61, avenue du Président Wilson, 94235 Cachan Cedex, France
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Abstract

This study deals with the long-term reliability of a high precision pressure sensor using bellows mainly made of electroplated Ni. Thermomechanical properties of this deposit are obtained by several experiments and compared to theoretical models, computations and other authors' results. Bellows are expected to stay in service for many decades, thus their high cycle fatigue behavior has to be known. Stress-life fatigue curve for crack initiation and fatigue crack growth in the electroplated Ni are measured and identified using numerical computations. Results are compared with other results obtained on similar Ni electrodeposits. Normalized stress-life fatigue curve shows no specific nanosize effects.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 821: Symposium P – Nanoscale Materials & Modeling-Relations Among Processing, Microstructure and Mechanical Properties , 2004 , P7.8
Copyright
Copyright © Materials Research Society 2004

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