Déformation inélastique induite par nanoindentation cyclique de verres métalliques à base de Zirconium

Abstract : Inelastic deformation induced by cyclic nanoindentation in Zr-based bulk metallic glasses. Monotonic and cyclic nanoindentation tests were carried out on Zr50Cu40Al10 bulk metallic glass (BMG) at loading rates ranging from 250 to 2500 μN/s and at ambient temperature. We found that cyclic loadings induced a mechanical softening which appears to be dependent on the number of cycles and the loading rates. The effect of loading rates was compared with the same nanoindentation tests on specimens of Zrbased metallic glass coated with CrN and TiN films. The inelastic deformation on Zr-based metallic glass was studied by analysing the remnant indent morphology using atomic force microscopy. A free-volume mechanism was proposed for interpreting these observations quantitatively.
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Submitted on : Wednesday, June 19, 2019 - 9:35:05 AM
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A. Tekaya, S. Labdi, T. Benameur, A. Jellad, P. Aubert, et al.. Déformation inélastique induite par nanoindentation cyclique de verres métalliques à base de Zirconium. Matériaux & Techniques, EDP Sciences, 2011, 99 (4), pp.471-481. ⟨10.1051/mattech/2011020⟩. ⟨hal-02159840⟩

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