Ductility by shear band delocalization in the nano-layer of gradient structure
Nanostructured (NS) metals typically fail soon after yielding, starting with the formation of narrow shear bands. Here we report the observation of shear band delocalization in gradient metals. Shear bands were nucleated and delocalized in the NS layers by propagating along the gage length soon afte...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2019-01-01
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| Series: | Materials Research Letters |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/21663831.2018.1546238 |
| _version_ | 1819243216946331648 |
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| author | Fuping Yuan Dingshun Yan Jiangda Sun Lingling Zhou Yuntian Zhu Xiaolei Wu |
| author_facet | Fuping Yuan Dingshun Yan Jiangda Sun Lingling Zhou Yuntian Zhu Xiaolei Wu |
| author_sort | Fuping Yuan |
| collection | DOAJ |
| description | Nanostructured (NS) metals typically fail soon after yielding, starting with the formation of narrow shear bands. Here we report the observation of shear band delocalization in gradient metals. Shear bands were nucleated and delocalized in the NS layers by propagating along the gage length soon after yielding, converting the shear band into a localized strain zone (LSZ). Synergistic work hardening was developed in the LSZ by regaining dislocation hardening capability, and by back-stress hardening from the strain gradients in the axial and depth directions, which helped with enhancing global ductility. |
| first_indexed | 2024-12-23T14:52:11Z |
| format | Article |
| id | doaj.art-60bf65c008b94f8f86641fe122375362 |
| institution | Directory Open Access Journal |
| issn | 2166-3831 |
| language | English |
| last_indexed | 2024-12-23T14:52:11Z |
| publishDate | 2019-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Materials Research Letters |
| spelling | doaj.art-60bf65c008b94f8f86641fe1223753622022-12-21T17:42:54ZengTaylor & Francis GroupMaterials Research Letters2166-38312019-01-0171121710.1080/21663831.2018.15462381546238Ductility by shear band delocalization in the nano-layer of gradient structureFuping Yuan0Dingshun Yan1Jiangda Sun2Lingling Zhou3Yuntian Zhu4Xiaolei Wu5Institute of MechanicsInstitute of MechanicsInstitute of MechanicsInstitute of MechanicsNanjing University of Science and TechnologyInstitute of MechanicsNanostructured (NS) metals typically fail soon after yielding, starting with the formation of narrow shear bands. Here we report the observation of shear band delocalization in gradient metals. Shear bands were nucleated and delocalized in the NS layers by propagating along the gage length soon after yielding, converting the shear band into a localized strain zone (LSZ). Synergistic work hardening was developed in the LSZ by regaining dislocation hardening capability, and by back-stress hardening from the strain gradients in the axial and depth directions, which helped with enhancing global ductility.http://dx.doi.org/10.1080/21663831.2018.1546238Gradient structureductilityshear bandstrain delocalizationback-stress hardening |
| spellingShingle | Fuping Yuan Dingshun Yan Jiangda Sun Lingling Zhou Yuntian Zhu Xiaolei Wu Ductility by shear band delocalization in the nano-layer of gradient structure Materials Research Letters Gradient structure ductility shear band strain delocalization back-stress hardening |
| title | Ductility by shear band delocalization in the nano-layer of gradient structure |
| title_full | Ductility by shear band delocalization in the nano-layer of gradient structure |
| title_fullStr | Ductility by shear band delocalization in the nano-layer of gradient structure |
| title_full_unstemmed | Ductility by shear band delocalization in the nano-layer of gradient structure |
| title_short | Ductility by shear band delocalization in the nano-layer of gradient structure |
| title_sort | ductility by shear band delocalization in the nano layer of gradient structure |
| topic | Gradient structure ductility shear band strain delocalization back-stress hardening |
| url | http://dx.doi.org/10.1080/21663831.2018.1546238 |
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