Segregation-dislocation self-organized structures ductilize a work-hardened medium entropy alloy
Abstract Dislocations are the intrinsic origin of crystal plasticity. However, initial high-density dislocations in work-hardened materials are commonly asserted to be detrimental to ductility according to textbook strengthening theory. Inspired by the self-organized critical states of non-equilibri...
Saved in:
| Main Authors: | , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-02-01
|
| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-56710-3 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1823861850427621376 |
|---|---|
| author | Bojing Guo Dingcong Cui Qingfeng Wu Yuemin Ma Daixiu Wei Kumara L. S. R Yashan Zhang Chenbo Xu Zhijun Wang Junjie Li Xin Lin Jincheng Wang Xun-li Wang Feng He |
| author_facet | Bojing Guo Dingcong Cui Qingfeng Wu Yuemin Ma Daixiu Wei Kumara L. S. R Yashan Zhang Chenbo Xu Zhijun Wang Junjie Li Xin Lin Jincheng Wang Xun-li Wang Feng He |
| author_sort | Bojing Guo |
| collection | DOAJ |
| description | Abstract Dislocations are the intrinsic origin of crystal plasticity. However, initial high-density dislocations in work-hardened materials are commonly asserted to be detrimental to ductility according to textbook strengthening theory. Inspired by the self-organized critical states of non-equilibrium complex systems in nature, we explored the mechanical response of an additively manufactured medium entropy alloy with segregation-dislocation self-organized structures (SD-SOS). We show here that when initial dislocations are in the form of SD-SOS, the textbook theory that dislocation hardening inevitably sacrifices ductility can be overturned. Our results reveal that the SD-SOS, in addition to providing dislocation sources by emitting dislocations and stacking faults, also dynamically interacts with gliding dislocations to generate sustainable Lomer-Cottrell locks and jogs for dislocation storage. The effective dislocation multiplication and storage capabilities lead to the continuous refinement of planar slip bands, resulting in high ductility in the work-hardened alloy produced by additive manufacturing. These findings set a precedent for optimizing the mechanical behavior of alloys via tuning dislocation configurations. |
| format | Article |
| id | doaj-art-e2f1eed255c941d097e997dceb25e523 |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-e2f1eed255c941d097e997dceb25e5232025-02-09T12:46:28ZengNature PortfolioNature Communications2041-17232025-02-0116111010.1038/s41467-025-56710-3Segregation-dislocation self-organized structures ductilize a work-hardened medium entropy alloyBojing Guo0Dingcong Cui1Qingfeng Wu2Yuemin Ma3Daixiu Wei4Kumara L. S. R5Yashan Zhang6Chenbo Xu7Zhijun Wang8Junjie Li9Xin Lin10Jincheng Wang11Xun-li Wang12Feng He13State Key Laboratory of Solidification Processing, Northwestern Polytechnical UniversityState Key Laboratory of Solidification Processing, Northwestern Polytechnical UniversityState Key Laboratory of Solidification Processing, Northwestern Polytechnical UniversityDepartment of Physics, City University of Hong KongJiangsu Belight Laboratory, State Key Laboratory of Advanced Casting Technologies, Nanjing University of Science and TechnologyCenter for Synchrotron Radiation Research, Japan Synchrotron Radiation Research Institute (JASRI)State Key Laboratory of Solidification Processing, Northwestern Polytechnical UniversityState Key Laboratory of Solidification Processing, Northwestern Polytechnical UniversityState Key Laboratory of Solidification Processing, Northwestern Polytechnical UniversityState Key Laboratory of Solidification Processing, Northwestern Polytechnical UniversityState Key Laboratory of Solidification Processing, Northwestern Polytechnical UniversityState Key Laboratory of Solidification Processing, Northwestern Polytechnical UniversityDepartment of Physics, City University of Hong KongState Key Laboratory of Solidification Processing, Northwestern Polytechnical UniversityAbstract Dislocations are the intrinsic origin of crystal plasticity. However, initial high-density dislocations in work-hardened materials are commonly asserted to be detrimental to ductility according to textbook strengthening theory. Inspired by the self-organized critical states of non-equilibrium complex systems in nature, we explored the mechanical response of an additively manufactured medium entropy alloy with segregation-dislocation self-organized structures (SD-SOS). We show here that when initial dislocations are in the form of SD-SOS, the textbook theory that dislocation hardening inevitably sacrifices ductility can be overturned. Our results reveal that the SD-SOS, in addition to providing dislocation sources by emitting dislocations and stacking faults, also dynamically interacts with gliding dislocations to generate sustainable Lomer-Cottrell locks and jogs for dislocation storage. The effective dislocation multiplication and storage capabilities lead to the continuous refinement of planar slip bands, resulting in high ductility in the work-hardened alloy produced by additive manufacturing. These findings set a precedent for optimizing the mechanical behavior of alloys via tuning dislocation configurations.https://doi.org/10.1038/s41467-025-56710-3 |
| spellingShingle | Bojing Guo Dingcong Cui Qingfeng Wu Yuemin Ma Daixiu Wei Kumara L. S. R Yashan Zhang Chenbo Xu Zhijun Wang Junjie Li Xin Lin Jincheng Wang Xun-li Wang Feng He Segregation-dislocation self-organized structures ductilize a work-hardened medium entropy alloy Nature Communications |
| title | Segregation-dislocation self-organized structures ductilize a work-hardened medium entropy alloy |
| title_full | Segregation-dislocation self-organized structures ductilize a work-hardened medium entropy alloy |
| title_fullStr | Segregation-dislocation self-organized structures ductilize a work-hardened medium entropy alloy |
| title_full_unstemmed | Segregation-dislocation self-organized structures ductilize a work-hardened medium entropy alloy |
| title_short | Segregation-dislocation self-organized structures ductilize a work-hardened medium entropy alloy |
| title_sort | segregation dislocation self organized structures ductilize a work hardened medium entropy alloy |
| url | https://doi.org/10.1038/s41467-025-56710-3 |
| work_keys_str_mv | AT bojingguo segregationdislocationselforganizedstructuresductilizeaworkhardenedmediumentropyalloy AT dingcongcui segregationdislocationselforganizedstructuresductilizeaworkhardenedmediumentropyalloy AT qingfengwu segregationdislocationselforganizedstructuresductilizeaworkhardenedmediumentropyalloy AT yueminma segregationdislocationselforganizedstructuresductilizeaworkhardenedmediumentropyalloy AT daixiuwei segregationdislocationselforganizedstructuresductilizeaworkhardenedmediumentropyalloy AT kumaralsr segregationdislocationselforganizedstructuresductilizeaworkhardenedmediumentropyalloy AT yashanzhang segregationdislocationselforganizedstructuresductilizeaworkhardenedmediumentropyalloy AT chenboxu segregationdislocationselforganizedstructuresductilizeaworkhardenedmediumentropyalloy AT zhijunwang segregationdislocationselforganizedstructuresductilizeaworkhardenedmediumentropyalloy AT junjieli segregationdislocationselforganizedstructuresductilizeaworkhardenedmediumentropyalloy AT xinlin segregationdislocationselforganizedstructuresductilizeaworkhardenedmediumentropyalloy AT jinchengwang segregationdislocationselforganizedstructuresductilizeaworkhardenedmediumentropyalloy AT xunliwang segregationdislocationselforganizedstructuresductilizeaworkhardenedmediumentropyalloy AT fenghe segregationdislocationselforganizedstructuresductilizeaworkhardenedmediumentropyalloy |