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Cyclic Nanoindentation and Finite Element Analysis of Ti/TiN and CrN Nanocoatings on Zr-Based Metallic Glasses Mechanical Performance

Abstract : Cyclic depth-sensing nanoindentation tests are carried out to unravel the effect of monolithic and multilayer thin coatings on load-bearing capacity and stress distribution in the coating-Zr-based metallic glass systems. Thin films of TiN, CrN, and Ti/TiN multilayer, having thickness of 300 nm, are deposited on Zr60Ni10Cu20Al10 and Zr50Cu40Al10 metallic glasses by RF sputtering technique. Strain softening occurs over several cycles in Zr-based metallic glasses, CrN, and TiN films as evidenced by a disparity between the unloading and reloading sequences. However, the cyclic nanoindentation of Ti/TiN multilayer coating results in a hysteresis loop in the load-depth profiles, and this event depends on the number of cycles and the loading rates. AFM and SEM characterization of remnant imprints revealed microcraks and crack-like shear bands in nanocoatings and Zr-based metallic glasses, respectively. Based on shear-fracture driven plastic flow of the coatings, a modified cavity model is used to determine the shear stress evolution as a function of penetration depth. The finite-element simulations predicted the stress distribution beneath the indenter and are well consistent with the evolving trend of shear stress obtained from experiments.
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https://hal-univ-evry.archives-ouvertes.fr/hal-02165190
Contributor : Sid Labdi <>
Submitted on : Tuesday, June 25, 2019 - 4:11:11 PM
Last modification on : Thursday, October 22, 2020 - 2:14:17 PM

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A. Tekaya, A. Ghulman, T. Benameur, S. Labdi. Cyclic Nanoindentation and Finite Element Analysis of Ti/TiN and CrN Nanocoatings on Zr-Based Metallic Glasses Mechanical Performance. Journal of Materials Engineering and Performance, Springer Verlag/ASM International, 2014, 23 (12), pp.4259-4270. ⟨10.1007/s11665-014-1212-4⟩. ⟨hal-02165190⟩

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