Serrated Plastic Flow of Various Metallic Glasses during Nanoindentation

Abstract:

Nanoindentation experiments were executed on amorphous metallic ribbons made of Fe₄₀Ni₄₀B₂₀, Cu₄₇Ti₃₅Zr₁₁Ni₆Si₁ and Zr₆₅Cu_17.5Ni₁₀Al_7.5 that differ in microhardness and glass forming ability. The individual serrated plastic flow events were analyzed in a wide range of the loading rates. In the individual pop-in events of the load-displacement (P-h) curve the contributions of plastic deformation (Δh_pl) were calculated depending on the loading rate and the alloy composition. It is concluded that the contribution of the serrated plastic deformation flow varies with the composition of the alloy. The highest plastic deformation for the individual pop-ins was observed for Zr-based metallic glasses.

• Periodical: Defect and Diffusion Forum (Volume 368)
• Pages: 3-6
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.368.3
• Online since: July 2016
• Authors: Maria Hurakova*, Kornel Csach, Jozef Miškuf, Alena Juríková, Stefan Demcak, Václav Ocelík, Jeff T.M. de Hosson
• Keywords: Metallic Glasses, Nanoindentation, Pop-Ins

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