Divergent Evolution of Slip Banding in Alloys
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arXiv
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866912083267813376 |
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| author | Xie, Bijun Chen, Hangman Wang, Pengfei Zhang, Cheng Xing, Bin Xu, Mingjie Wang, Xin Valdevit, Lorenzo Rimoli, Julian Pan, Xiaoqing Cao, Penghui |
| author_facet | Xie, Bijun Chen, Hangman Wang, Pengfei Zhang, Cheng Xing, Bin Xu, Mingjie Wang, Xin Valdevit, Lorenzo Rimoli, Julian Pan, Xiaoqing Cao, Penghui |
| contents | Metallic materials under high stress often exhibit deformation localization, manifesting as slip banding. Over seven decades ago, Frank and Read introduced the well-known model of dislocation multiplication at a source, explaining slip band formation. Here, we reveal two distinct types of slip bands (confined and extended) in alloys through multi-scale testing and modeling from microscopic to atomic scales. The confined slip band, characterized by a thin glide zone, arises from the conventional process of repetitive full dislocation emissions at Frank-Read source. Contrary to the classical model, the extended band stems from slip-induced deactivation of dislocation sources, followed by consequent generation of new sources on adjacent planes, leading to rapid band thickening. Our findings provide critical insights into atomic-scale collective dislocation motion and microscopic deformation instability in advanced structural materials, marking a pivotal advancement in our fundamental understanding of deformation dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_17582 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Divergent Evolution of Slip Banding in Alloys Xie, Bijun Chen, Hangman Wang, Pengfei Zhang, Cheng Xing, Bin Xu, Mingjie Wang, Xin Valdevit, Lorenzo Rimoli, Julian Pan, Xiaoqing Cao, Penghui Materials Science Metallic materials under high stress often exhibit deformation localization, manifesting as slip banding. Over seven decades ago, Frank and Read introduced the well-known model of dislocation multiplication at a source, explaining slip band formation. Here, we reveal two distinct types of slip bands (confined and extended) in alloys through multi-scale testing and modeling from microscopic to atomic scales. The confined slip band, characterized by a thin glide zone, arises from the conventional process of repetitive full dislocation emissions at Frank-Read source. Contrary to the classical model, the extended band stems from slip-induced deactivation of dislocation sources, followed by consequent generation of new sources on adjacent planes, leading to rapid band thickening. Our findings provide critical insights into atomic-scale collective dislocation motion and microscopic deformation instability in advanced structural materials, marking a pivotal advancement in our fundamental understanding of deformation dynamics. |
| title | Divergent Evolution of Slip Banding in Alloys |
| topic | Materials Science |
| url | https://arxiv.org/abs/2410.17582 |