Thermomechanical properties and fatigue of nanocrystalline Ni/Cu electrodeposits

Olivier Arnould (1) , Olivier Hubert , François Hild

1 LMT - Laboratoire de mécanique et technologie

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.

Domaines: Mécanique des matériaux [physics.class-ph]

Olivier Arnould, Olivier Hubert, François Hild. Thermomechanical properties and fatigue of nanocrystalline Ni/Cu electrodeposits. Material Research Society Spring Meeting, Apr 2004, San Francisco, United States. pp.P7.8.1-6, ⟨10.1557/PROC-821-P7.8⟩. ⟨hal-01961195⟩