Investigating amorphization as a deformation mechanism using a novel phase field model at the mesoscale
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866915539943686144 |
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| author | Huang, Yuntong Dai, Shuyang Chen, Chuqi Xiang, Yang |
| author_facet | Huang, Yuntong Dai, Shuyang Chen, Chuqi Xiang, Yang |
| contents | Amorphization during severe plastic deformation has been observed in various crystalline materials, yet its
underlying mechanisms remain poorly understood. This study introduces a novel phase-field model at the mesoscale,
integrating elastoplastic theory with a deviatoric stress-dependent transformation strain tensor to capture
stress-induced amorphization. The model enables quantitative predictions of amorphous phase nucleation and
propagation under high stress, resolving distinctive microstructural patterns such as amorphous shear bands.
Simulations reveal key phenomena, including avalanche-like amorphization, grain size effects, the Hall-Petch effect,
and surface amorphization, consistent with experimental observations. By bridging phase-field methods with elastoplastic
theory, this work provides a robust framework for studying amorphization as a deformation mechanism and offers valuable
insights for designing materials resistant to extreme mechanical conditions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_19043 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Investigating amorphization as a deformation mechanism using a novel phase field model at the mesoscale Huang, Yuntong Dai, Shuyang Chen, Chuqi Xiang, Yang Materials Science Amorphization during severe plastic deformation has been observed in various crystalline materials, yet its underlying mechanisms remain poorly understood. This study introduces a novel phase-field model at the mesoscale, integrating elastoplastic theory with a deviatoric stress-dependent transformation strain tensor to capture stress-induced amorphization. The model enables quantitative predictions of amorphous phase nucleation and propagation under high stress, resolving distinctive microstructural patterns such as amorphous shear bands. Simulations reveal key phenomena, including avalanche-like amorphization, grain size effects, the Hall-Petch effect, and surface amorphization, consistent with experimental observations. By bridging phase-field methods with elastoplastic theory, this work provides a robust framework for studying amorphization as a deformation mechanism and offers valuable insights for designing materials resistant to extreme mechanical conditions. |
| title | Investigating amorphization as a deformation mechanism using a novel phase field model at the mesoscale |
| topic | Materials Science |
| url | https://arxiv.org/abs/2407.19043 |