Avalanches in CuZrAl metallic glasses

Tero Mäkinen; Anshul D. S. Parmar; Silvia Bonfanti; Mikko J. Alava

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arXiv · 2409.15058

Avalanches in CuZrAl metallic glasses

Tero Mäkinen·Anshul D. S. Parmar·Silvia Bonfanti·Mikko J. Alava

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Abstract

Metallic glasses have mechanical properties, which exhibit avalanches in the disguise of stress drops. We study these phenomena in a classical metallic glass system CuZrAl by athermal quasistatic shear and varying the element concentrations and for pure CuZr 50/50 case the cooling rate. The resulting mechanical properties are close to the behaviour found experimentally. At small strains, the pristine systems are akin to other glassy systems with a so-called gap distribution with a small positive exponent. Critical avalanching behaviour is found only approaching the yield point. The post-yield stress drops are universal, and the gap distribution becomes flat.

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Tero Mäkinen, Anshul D. S. Parmar, Silvia Bonfanti, Mikko J. Alava. 2024-09-23. Avalanches in CuZrAl metallic glasses. https://arxiv.org/abs/2409.15058

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