Comparative analysis of nanoindentation-induced incipient deformation of zirconium-based bulk metallic glass in various structural states

Silvia Pomes; Nozomu Adachi; Masato Wakeda; Takahito Ohmura

doi:10.1016/j.intermet.2024.108269

論文 Comparative analysis of nanoindentation-induced incipient deformation of zirconium-based bulk metallic glass in various structural states

Silvia Pomes (National Institute for Materials Science) ; Nozomu Adachi ; Masato Wakeda (National Institute for Materials Science) ; Takahito Ohmura (National Institute for Materials Science)

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Silvia Pomes, Nozomu Adachi, Masato Wakeda, Takahito Ohmura. Comparative analysis of nanoindentation-induced incipient deformation of zirconium-based bulk metallic glass in various structural states. Intermetallics. 2024, 168 (), 108269. https://doi.org/10.1016/j.intermet.2024.108269

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(abstract)

The incipient plastic deformation behaviour of as-cast and annealed samples of Zr50Cu40Al10 (atom %) bulk metallic glass was investigated by nanoindentation. A validated load-over-displacement versus displacement plot showed the existence of a precursor event to incipient plasticity in both samples. The activation stress remained consistent in both samples, indicating that the event corresponds to local behaviour in regions with the same energy state, and it is not influenced by the overall microstructure. Conversely, the first serration detected in the as-relaxed sample exhibited a greater magnitude, potentially arising from a distinct energy-dissipation rate related to larger-scale microstructural characteristics.

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