Low-cycle fatigue behaviour of Mg-9Gd-4Y-2Zn-0.5Zr alloys with different structures
The strain-controlled cyclic deformation behaviour of Mg-9Gd-4Y-2Zn-0.5Zr with different structures was investigated. Alloys were prepared by solution, extrusion and pre-ageing extrusion, and the microstructures before and after the fatigue tests were characterized. Experimental results indicated th...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-09-01
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| Series: | Journal of Magnesium and Alloys |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956722000846 |
| _version_ | 1797630621180231680 |
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| author | Jinsheng Ji Jie Zheng Leichen Jia Yong Zhang Yunfei Jia Yusha Shi Heng Zhang Yong Xue |
| author_facet | Jinsheng Ji Jie Zheng Leichen Jia Yong Zhang Yunfei Jia Yusha Shi Heng Zhang Yong Xue |
| author_sort | Jinsheng Ji |
| collection | DOAJ |
| description | The strain-controlled cyclic deformation behaviour of Mg-9Gd-4Y-2Zn-0.5Zr with different structures was investigated. Alloys were prepared by solution, extrusion and pre-ageing extrusion, and the microstructures before and after the fatigue tests were characterized. Experimental results indicated that the bimodal structure owned the better performance in fatigue test, which was attributed to the higher yield strength. For the equiaxed structure, cyclic hardening induced stress concentration until the failure. Stable cyclic deformation and persistent cyclic softening played an important role at the low and high strain amplitudes, respectively. This was attributed to the formation of fine grains relieving the stress concentration during cyclic loading. In addition, residual twins were observed in equiaxed structure to induce crack, and the bimodal structure effectively restrain it. |
| first_indexed | 2024-03-11T11:10:46Z |
| format | Article |
| id | doaj.art-9a86ea8befb74c538f3f18de22de3956 |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-03-11T11:10:46Z |
| publishDate | 2023-09-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-9a86ea8befb74c538f3f18de22de39562023-11-12T04:39:59ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672023-09-0111933823393Low-cycle fatigue behaviour of Mg-9Gd-4Y-2Zn-0.5Zr alloys with different structuresJinsheng Ji0Jie Zheng1Leichen Jia2Yong Zhang3Yunfei Jia4Yusha Shi5Heng Zhang6Yong Xue7School of Materials Science and Engineering, North University of China, Taiyuan 030051, ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, ChinaKey Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, ChinaKey Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China; Corresponding authors.School of Materials Science and Engineering, North University of China, Taiyuan 030051, ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, China; Corresponding authors.The strain-controlled cyclic deformation behaviour of Mg-9Gd-4Y-2Zn-0.5Zr with different structures was investigated. Alloys were prepared by solution, extrusion and pre-ageing extrusion, and the microstructures before and after the fatigue tests were characterized. Experimental results indicated that the bimodal structure owned the better performance in fatigue test, which was attributed to the higher yield strength. For the equiaxed structure, cyclic hardening induced stress concentration until the failure. Stable cyclic deformation and persistent cyclic softening played an important role at the low and high strain amplitudes, respectively. This was attributed to the formation of fine grains relieving the stress concentration during cyclic loading. In addition, residual twins were observed in equiaxed structure to induce crack, and the bimodal structure effectively restrain it.http://www.sciencedirect.com/science/article/pii/S2213956722000846Strain-controlled fatigueBimodal structureFractographyMg-Gd-Y-Zn-Zr alloy |
| spellingShingle | Jinsheng Ji Jie Zheng Leichen Jia Yong Zhang Yunfei Jia Yusha Shi Heng Zhang Yong Xue Low-cycle fatigue behaviour of Mg-9Gd-4Y-2Zn-0.5Zr alloys with different structures Journal of Magnesium and Alloys Strain-controlled fatigue Bimodal structure Fractography Mg-Gd-Y-Zn-Zr alloy |
| title | Low-cycle fatigue behaviour of Mg-9Gd-4Y-2Zn-0.5Zr alloys with different structures |
| title_full | Low-cycle fatigue behaviour of Mg-9Gd-4Y-2Zn-0.5Zr alloys with different structures |
| title_fullStr | Low-cycle fatigue behaviour of Mg-9Gd-4Y-2Zn-0.5Zr alloys with different structures |
| title_full_unstemmed | Low-cycle fatigue behaviour of Mg-9Gd-4Y-2Zn-0.5Zr alloys with different structures |
| title_short | Low-cycle fatigue behaviour of Mg-9Gd-4Y-2Zn-0.5Zr alloys with different structures |
| title_sort | low cycle fatigue behaviour of mg 9gd 4y 2zn 0 5zr alloys with different structures |
| topic | Strain-controlled fatigue Bimodal structure Fractography Mg-Gd-Y-Zn-Zr alloy |
| url | http://www.sciencedirect.com/science/article/pii/S2213956722000846 |
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