Thermomechanical Dissipative behaviour of CuZr metallic glasses
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866911061571010560 |
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| author | Sepulveda-Macias, Matias Molnár, Gergely Tanguy, Anne |
| author_facet | Sepulveda-Macias, Matias Molnár, Gergely Tanguy, Anne |
| contents | We performed molecular dynamics simulations of Zr$_{50}$Cu$_{50}$ metallic glass samples submitted to mechanical deformation at different strain rates. The simultaneous measurements of the stress-strain curve, and of the temperature evolution during the cyclic mechanical load, are used to determine the thermo-mechanical constitutive laws at the continuum scale. It is shown that plastic deformation acts as a heat source, but strong finite size effects affect the unfolding of shear bands and its related dissipation rate. Finally, a thermo-mechanical constitutive law is proposed to reproduce quantitavely self-heating processes at different scales. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2401_05117 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Thermomechanical Dissipative behaviour of CuZr metallic glasses Sepulveda-Macias, Matias Molnár, Gergely Tanguy, Anne Materials Science Mesoscale and Nanoscale Physics We performed molecular dynamics simulations of Zr$_{50}$Cu$_{50}$ metallic glass samples submitted to mechanical deformation at different strain rates. The simultaneous measurements of the stress-strain curve, and of the temperature evolution during the cyclic mechanical load, are used to determine the thermo-mechanical constitutive laws at the continuum scale. It is shown that plastic deformation acts as a heat source, but strong finite size effects affect the unfolding of shear bands and its related dissipation rate. Finally, a thermo-mechanical constitutive law is proposed to reproduce quantitavely self-heating processes at different scales. |
| title | Thermomechanical Dissipative behaviour of CuZr metallic glasses |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2401.05117 |