Unveiling the Asymmetry in Density within the Shear Bands of Metallic Glasses
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866911962056622080 |
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| author | Rösner, Harald Bera, Arabinda Zaccone, Alessio |
| author_facet | Rösner, Harald Bera, Arabinda Zaccone, Alessio |
| contents | Plastic deformation in metallic glasses at room temperature leads to the development of shear bands due to shear localization. In many experiments, shear bands have shown local density variations along their path, with a distinct imbalance in magnitude between local densification and dilation. However, a comprehensive mechanistic understanding or theory to explain this asymmetry has been lacking until now. Here, we introduce a new model that consists of a sequential arrangement of alternating topological 'charges', generating a dipolar field. The resulting microscopic displacement field, when integrated into the deformation gradient tensor, provides an accurate analytical solution for the observed imbalances in the density variations. The implications of this method are discussed, highlighting the potential to elucidate a broader range of observations in shear bands. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_07733 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Unveiling the Asymmetry in Density within the Shear Bands of Metallic Glasses Rösner, Harald Bera, Arabinda Zaccone, Alessio Disordered Systems and Neural Networks Materials Science Soft Condensed Matter Classical Physics Plastic deformation in metallic glasses at room temperature leads to the development of shear bands due to shear localization. In many experiments, shear bands have shown local density variations along their path, with a distinct imbalance in magnitude between local densification and dilation. However, a comprehensive mechanistic understanding or theory to explain this asymmetry has been lacking until now. Here, we introduce a new model that consists of a sequential arrangement of alternating topological 'charges', generating a dipolar field. The resulting microscopic displacement field, when integrated into the deformation gradient tensor, provides an accurate analytical solution for the observed imbalances in the density variations. The implications of this method are discussed, highlighting the potential to elucidate a broader range of observations in shear bands. |
| title | Unveiling the Asymmetry in Density within the Shear Bands of Metallic Glasses |
| topic | Disordered Systems and Neural Networks Materials Science Soft Condensed Matter Classical Physics |
| url | https://arxiv.org/abs/2407.07733 |