Outstanding fatigue performance of Mg-Gd-Zn-Zr alloy enriched with SFs rather than LPSO Structure
Both solute-segregated long-period stacking ordered (LPSO) structure and stacking faults (SFs) are essential in strengthening rare-earth (RE) Mg alloys. Herein, LPSO-enriched Mg and SFs-enriched Mg are fabricated and comparably investigated for fatigue performances. During fatigue, the Mg nanolayers...
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KeAi Communications Co., Ltd.
2025-01-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956724003724 |
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| author | Yao Chen Fulin Liu Yujuan Wu Liming Peng Lang Li Chao He Qiang Chen Yongjie Liu Qingyuan Wang |
| author_facet | Yao Chen Fulin Liu Yujuan Wu Liming Peng Lang Li Chao He Qiang Chen Yongjie Liu Qingyuan Wang |
| author_sort | Yao Chen |
| collection | DOAJ |
| description | Both solute-segregated long-period stacking ordered (LPSO) structure and stacking faults (SFs) are essential in strengthening rare-earth (RE) Mg alloys. Herein, LPSO-enriched Mg and SFs-enriched Mg are fabricated and comparably investigated for fatigue performances. During fatigue, the Mg nanolayers between LPSO lamellae or SFs act as the gliding channels of dislocations. However, SFs-enriched Mg exhibits outstanding fatigue strength due to solute strengthening within Mg nanolayers. Solute strengthening is assumed to contribute to the local accumulation of basal dislocations and the activation of non-basal dislocations. Dislocations are restricted locally and cannot glide long distances to specimen surfaces, which mitigates fatigue-induced extrusions and slip markings, ultimately leading to an increase in fatigue strength. These findings guide the development of RE-Mg alloys towards a synergy between high tensile and high fatigue performances. |
| format | Article |
| id | doaj-art-d1e8504f7eee44cf8e3cf2d7e65818d9 |
| institution | Kabale University |
| issn | 2213-9567 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-d1e8504f7eee44cf8e3cf2d7e65818d92025-02-06T05:11:42ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672025-01-0113190100Outstanding fatigue performance of Mg-Gd-Zn-Zr alloy enriched with SFs rather than LPSO StructureYao Chen0Fulin Liu1Yujuan Wu2Liming Peng3Lang Li4Chao He5Qiang Chen6Yongjie Liu7Qingyuan Wang8Failure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, China; Department of Mechanical Engineering, Kyushu University, Fukuoka 819-0395, JapanFailure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, ChinaNational Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, ChinaNational Engineering Research Center of Light Alloy Net Forming and Key State Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, ChinaFailure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, ChinaFailure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, ChinaDepartment of Mechanical Engineering, Kyushu University, Fukuoka 819-0395, Japan; Institute for Advanced Study, Chengdu University, Chengdu 610106, ChinaFailure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, China; Corresponding authors at: Failure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, China.Failure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, China; Institute for Advanced Study, Chengdu University, Chengdu 610106, China; Corresponding authors at: Failure Mechanics and Engineering Disaster Prevention Key Laboratory of Sichuan Province, Sichuan University, Chengdu 610065, China.Both solute-segregated long-period stacking ordered (LPSO) structure and stacking faults (SFs) are essential in strengthening rare-earth (RE) Mg alloys. Herein, LPSO-enriched Mg and SFs-enriched Mg are fabricated and comparably investigated for fatigue performances. During fatigue, the Mg nanolayers between LPSO lamellae or SFs act as the gliding channels of dislocations. However, SFs-enriched Mg exhibits outstanding fatigue strength due to solute strengthening within Mg nanolayers. Solute strengthening is assumed to contribute to the local accumulation of basal dislocations and the activation of non-basal dislocations. Dislocations are restricted locally and cannot glide long distances to specimen surfaces, which mitigates fatigue-induced extrusions and slip markings, ultimately leading to an increase in fatigue strength. These findings guide the development of RE-Mg alloys towards a synergy between high tensile and high fatigue performances.http://www.sciencedirect.com/science/article/pii/S2213956724003724Long-period stacking ordered (LPSO) structureStacking faults (SFS)Mg nanolayersSolute strengtheningFatigue performances |
| spellingShingle | Yao Chen Fulin Liu Yujuan Wu Liming Peng Lang Li Chao He Qiang Chen Yongjie Liu Qingyuan Wang Outstanding fatigue performance of Mg-Gd-Zn-Zr alloy enriched with SFs rather than LPSO Structure Journal of Magnesium and Alloys Long-period stacking ordered (LPSO) structure Stacking faults (SFS) Mg nanolayers Solute strengthening Fatigue performances |
| title | Outstanding fatigue performance of Mg-Gd-Zn-Zr alloy enriched with SFs rather than LPSO Structure |
| title_full | Outstanding fatigue performance of Mg-Gd-Zn-Zr alloy enriched with SFs rather than LPSO Structure |
| title_fullStr | Outstanding fatigue performance of Mg-Gd-Zn-Zr alloy enriched with SFs rather than LPSO Structure |
| title_full_unstemmed | Outstanding fatigue performance of Mg-Gd-Zn-Zr alloy enriched with SFs rather than LPSO Structure |
| title_short | Outstanding fatigue performance of Mg-Gd-Zn-Zr alloy enriched with SFs rather than LPSO Structure |
| title_sort | outstanding fatigue performance of mg gd zn zr alloy enriched with sfs rather than lpso structure |
| topic | Long-period stacking ordered (LPSO) structure Stacking faults (SFS) Mg nanolayers Solute strengthening Fatigue performances |
| url | http://www.sciencedirect.com/science/article/pii/S2213956724003724 |
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