Evolution of deformation mechanisms and their orientation dependence in fine-grained Mg-3Gd during tension
Magnesium alloys usually exhibit poor ductility attributed to their intrinsic hexagonal close-packed (hcp) structure, which fails to provide sufficient independent slip systems for homogeneous deformation. Here we demonstrate that multiple deformation mechanisms can be activated with increasing tens...
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KeAi Communications Co., Ltd.
2024-12-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221395672400121X |
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| author | Faping Hu Tianbo Yu Hao Chen Fang Han Keshun Dai Fangcheng Qiu Weidong Xie Xiaoxu Huang |
| author_facet | Faping Hu Tianbo Yu Hao Chen Fang Han Keshun Dai Fangcheng Qiu Weidong Xie Xiaoxu Huang |
| author_sort | Faping Hu |
| collection | DOAJ |
| description | Magnesium alloys usually exhibit poor ductility attributed to their intrinsic hexagonal close-packed (hcp) structure, which fails to provide sufficient independent slip systems for homogeneous deformation. Here we demonstrate that multiple deformation mechanisms can be activated with increasing tensile strain in a fine-grained Mg-3Gd with a weak basal texture. 〈c + a〉 slip, tension twinning and compression/double twinning exhibit a high orientation dependence at an early stage of deformation, whereas the orientation dependence becomes less obvious with further increasing strain. The high work hardening rate at the strain of 2%–5% is accompanied by the significant increase of 〈c + a〉 slip and tension twinning activities. The fine microstructure strongly restricts the activation and growth of twinning, resulting in a slow exhaust of tension twinning and thin compression twins. The restriction of twinning and the activation of profuse 〈c + a〉 slip near grain/twin boundaries, relaxing the stress concentration, sustain the homogeneous deformation to a high strain. |
| format | Article |
| id | doaj-art-2bb1a2fb869a4c30831f280ab27ca506 |
| institution | Kabale University |
| issn | 2213-9567 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-2bb1a2fb869a4c30831f280ab27ca5062025-01-10T04:37:57ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672024-12-01121250955107Evolution of deformation mechanisms and their orientation dependence in fine-grained Mg-3Gd during tensionFaping Hu0Tianbo Yu1Hao Chen2Fang Han3Keshun Dai4Fangcheng Qiu5Weidong Xie6Xiaoxu Huang7Electric Power Research Institute, Yunnan power Grid Co., Ltd., Kunming, Yunnan 650217, China; College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; Corresponding author at: Electric Power Research Institute, Yunnan power Grid Co., Ltd., Kunming, Yunnan 650217, China.Department of Civil and Mechanical Engineering, Technical University of Denmark, DK-2800 Kgs, Lyngby, DenmarkCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, ChinaElectric Power Research Institute, Yunnan power Grid Co., Ltd., Kunming, Yunnan 650217, ChinaElectric Power Research Institute, Yunnan power Grid Co., Ltd., Kunming, Yunnan 650217, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, ChinaCollege of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; Corresponding at: College of Materials Science and Engineering, Chongqing University, Chongqing 400044, ChinaMagnesium alloys usually exhibit poor ductility attributed to their intrinsic hexagonal close-packed (hcp) structure, which fails to provide sufficient independent slip systems for homogeneous deformation. Here we demonstrate that multiple deformation mechanisms can be activated with increasing tensile strain in a fine-grained Mg-3Gd with a weak basal texture. 〈c + a〉 slip, tension twinning and compression/double twinning exhibit a high orientation dependence at an early stage of deformation, whereas the orientation dependence becomes less obvious with further increasing strain. The high work hardening rate at the strain of 2%–5% is accompanied by the significant increase of 〈c + a〉 slip and tension twinning activities. The fine microstructure strongly restricts the activation and growth of twinning, resulting in a slow exhaust of tension twinning and thin compression twins. The restriction of twinning and the activation of profuse 〈c + a〉 slip near grain/twin boundaries, relaxing the stress concentration, sustain the homogeneous deformation to a high strain.http://www.sciencedirect.com/science/article/pii/S221395672400121XFine-grained Mg alloyDeformation mechanismsOrientation dependenceMechanical property |
| spellingShingle | Faping Hu Tianbo Yu Hao Chen Fang Han Keshun Dai Fangcheng Qiu Weidong Xie Xiaoxu Huang Evolution of deformation mechanisms and their orientation dependence in fine-grained Mg-3Gd during tension Journal of Magnesium and Alloys Fine-grained Mg alloy Deformation mechanisms Orientation dependence Mechanical property |
| title | Evolution of deformation mechanisms and their orientation dependence in fine-grained Mg-3Gd during tension |
| title_full | Evolution of deformation mechanisms and their orientation dependence in fine-grained Mg-3Gd during tension |
| title_fullStr | Evolution of deformation mechanisms and their orientation dependence in fine-grained Mg-3Gd during tension |
| title_full_unstemmed | Evolution of deformation mechanisms and their orientation dependence in fine-grained Mg-3Gd during tension |
| title_short | Evolution of deformation mechanisms and their orientation dependence in fine-grained Mg-3Gd during tension |
| title_sort | evolution of deformation mechanisms and their orientation dependence in fine grained mg 3gd during tension |
| topic | Fine-grained Mg alloy Deformation mechanisms Orientation dependence Mechanical property |
| url | http://www.sciencedirect.com/science/article/pii/S221395672400121X |
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