Fracture Behavior in Cu46.5Zr46.5Al7 and Cu46.5Zr41.5Al7Y5 Bulk Metallic Glasses |
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| Authors: | P Matteis P Russo Spena C Pozzi TA Baser M Baricco L Battezzati D Firrao and A Castellero |
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| Affiliation: | (1) DISMIC, Politecnico di Torino, Torino, 10129, Italy;(2) DISPEA, Politecnico di Torino, Torino, 10129, Italy;(3) Laboratory for Joining Interface and Technology, Swiss Federal Laboratories for Materials Testing and Research, D?bendorf, 8600, Switzerland;(4) Dipartimento di Chimica IFM and NIS, Universit? di Torino, Torino, 10125, Italy; |
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| Abstract: | The interplay between chemical composition, plastic behavior, and fracture modes of Cu46.5Zr46.5Al7 and Cu46.5Zr41.5Al7Y5 bulk metallic glasses (BMGs) was investigated by compression tests and fracture surfaces analyses. The aim was to explore
the possibility of coupling physical, chemical, and hardness properties, with adequate macroscopic compressive plasticity.
Cylindrical test samples, having a height-to-diameter ratio equal to 2, were machined and ground from as-cast bars and were
tested in compression between lubricated plates, the displacement being measured by a clip-gage inserted between the plates.
Y free BMG engineering stress-strain curves show a plastic behavior consisting of successive sudden stress drops and linear
reloading segments. A detailed analysis of these features was performed to yield a correlation between the plastic deformation
steps and the released elastic energy associated with each serration. |
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