Small-scale and intermittent plasticity based on dislocation cell continuum crystal plasticity model.
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| Title: | Small-scale and intermittent plasticity based on dislocation cell continuum crystal plasticity model. |
|---|---|
| Authors: | Guo, Huili1,2 (AUTHOR) guohuili0211@163.com, Deng, Xin1 (AUTHOR), Shang, Fulin2 (AUTHOR) |
| Source: | Acta Mechanica. Mar2025, Vol. 236 Issue 3, p1633-1645. 13p. |
| Subjects: | Dislocation structure, Crystal models, Dislocation density, Cell anatomy, Evolution equations |
| Abstract: | The recent experimental and theoretical studies indicate that the heterogeneous dislocation cell structure in metal sample at micron scale plays a significance role in characterizing the size effect and stair-like fluctuation plasticity deformation. To reveal the essential connection between the dislocation cell structure and the unravel plasticity deformation behaviors, a dislocation-based continuum crystal plasticity model is proposed in this work to simulated the microcompression tests for micropillars at the different micron sizes. The heterogeneous distribution of the dislocations in the micropillar is formulated by the evolution equations of dislocation density of the dislocation cell and wall for the first time. It is confirmed that the cell size and wall thickness are correlated with the dislocation density in cell and wall. The microcompression simulation of the single crystal Ni sample at micron scale with diameter ranging from 2 and 20 μm is applied by the present model. The results reveal that the size effect of the flow stress not only depend on the dislocation cell size (DCS) and wall thickness (DWT), but also depend on the diameter of micropillar. The intermittent flow is attributed to the heterogeneous distribution of dislocations. It is also observed that the dislocation cell structure refinement phenomenon is apparent with the increase in plasticity deformation. [ABSTRACT FROM AUTHOR] |
| Copyright of Acta Mechanica is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 183750925 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Small-scale and intermittent plasticity based on dislocation cell continuum crystal plasticity model. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Guo%2C+Huili%22">Guo, Huili</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> guohuili0211@163.com</i><br /><searchLink fieldCode="AR" term="%22Deng%2C+Xin%22">Deng, Xin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shang%2C+Fulin%22">Shang, Fulin</searchLink><relatesTo>2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Acta+Mechanica%22">Acta Mechanica</searchLink>. Mar2025, Vol. 236 Issue 3, p1633-1645. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Dislocation+structure%22">Dislocation structure</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+models%22">Crystal models</searchLink><br /><searchLink fieldCode="DE" term="%22Dislocation+density%22">Dislocation density</searchLink><br /><searchLink fieldCode="DE" term="%22Cell+anatomy%22">Cell anatomy</searchLink><br /><searchLink fieldCode="DE" term="%22Evolution+equations%22">Evolution equations</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The recent experimental and theoretical studies indicate that the heterogeneous dislocation cell structure in metal sample at micron scale plays a significance role in characterizing the size effect and stair-like fluctuation plasticity deformation. To reveal the essential connection between the dislocation cell structure and the unravel plasticity deformation behaviors, a dislocation-based continuum crystal plasticity model is proposed in this work to simulated the microcompression tests for micropillars at the different micron sizes. The heterogeneous distribution of the dislocations in the micropillar is formulated by the evolution equations of dislocation density of the dislocation cell and wall for the first time. It is confirmed that the cell size and wall thickness are correlated with the dislocation density in cell and wall. The microcompression simulation of the single crystal Ni sample at micron scale with diameter ranging from 2 and 20 μm is applied by the present model. The results reveal that the size effect of the flow stress not only depend on the dislocation cell size (DCS) and wall thickness (DWT), but also depend on the diameter of micropillar. The intermittent flow is attributed to the heterogeneous distribution of dislocations. It is also observed that the dislocation cell structure refinement phenomenon is apparent with the increase in plasticity deformation. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Acta Mechanica is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00707-025-04231-x Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 1633 Subjects: – SubjectFull: Dislocation structure Type: general – SubjectFull: Crystal models Type: general – SubjectFull: Dislocation density Type: general – SubjectFull: Cell anatomy Type: general – SubjectFull: Evolution equations Type: general Titles: – TitleFull: Small-scale and intermittent plasticity based on dislocation cell continuum crystal plasticity model. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Guo, Huili – PersonEntity: Name: NameFull: Deng, Xin – PersonEntity: Name: NameFull: Shang, Fulin IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 00015970 Numbering: – Type: volume Value: 236 – Type: issue Value: 3 Titles: – TitleFull: Acta Mechanica Type: main |
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