A comprehensive analysis on microstructure evolution of Mg-5.65Zn-0.66Zr alloy during hot deformation
The microstructure evolution of Mg-5.65Zn-0.66Zr (wt.%) alloy was studied based on the hot compression tests. The results indicated that the flow stress increased rapidly to a peak point at the initial stage, and then it gradually decreased. Moreover, high temperature and low strain rate resulted in...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2021-03-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956720301912 |
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| author | Qian Cheng Liang Chen Jianwei Tang Guoqun Zhao Lu Sun Cunsheng Zhang |
| author_facet | Qian Cheng Liang Chen Jianwei Tang Guoqun Zhao Lu Sun Cunsheng Zhang |
| author_sort | Qian Cheng |
| collection | DOAJ |
| description | The microstructure evolution of Mg-5.65Zn-0.66Zr (wt.%) alloy was studied based on the hot compression tests. The results indicated that the flow stress increased rapidly to a peak point at the initial stage, and then it gradually decreased. Moreover, high temperature and low strain rate resulted in the decreasing of flow stress. All samples exhibited a necklace grain structure because of the occurrence of partial dynamic recrystallization (DRX). High temperature increased both the size and fraction of DRXed grains, while high strain rate showed an opposite tendency. At the conditions of 350 °C/0.001 s−1 and 350 °C/0.1 s−1, the twins were not exhibited and DRX played a dominant role. Importantly, the obvious split of basal texture was observed. The pyramidal <c+a> slip with high value of Schmid factor was active in large deformed grains, which corresponded to the peak split point in (0001) pole figure. A mechanism about the grain rotation was proposed to explain the relationship between the pyramidal slip and the split of basal texture. Finally, it was found that large number of {10–12} extension twins were formed during the initial stage at condition of 300 °C/1 s−1, and the number of twins decreased with the increase of strain. The twins greatly contributed to the fast formation of basal texture and grain rotation. Moreover, the non-basal slips were active in twining region, which could facilitate the nucleation of DRX. |
| first_indexed | 2024-04-24T08:15:11Z |
| format | Article |
| id | doaj.art-a0c3020a97244336ad7a538060a77c62 |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-04-24T08:15:11Z |
| publishDate | 2021-03-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-a0c3020a97244336ad7a538060a77c622024-04-17T04:23:00ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672021-03-0192520531A comprehensive analysis on microstructure evolution of Mg-5.65Zn-0.66Zr alloy during hot deformationQian Cheng0Liang Chen1Jianwei Tang2Guoqun Zhao3Lu Sun4Cunsheng Zhang5Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong 250061, PR ChinaCorresponding author.; Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong 250061, PR ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong 250061, PR ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong 250061, PR ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong 250061, PR ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong 250061, PR ChinaThe microstructure evolution of Mg-5.65Zn-0.66Zr (wt.%) alloy was studied based on the hot compression tests. The results indicated that the flow stress increased rapidly to a peak point at the initial stage, and then it gradually decreased. Moreover, high temperature and low strain rate resulted in the decreasing of flow stress. All samples exhibited a necklace grain structure because of the occurrence of partial dynamic recrystallization (DRX). High temperature increased both the size and fraction of DRXed grains, while high strain rate showed an opposite tendency. At the conditions of 350 °C/0.001 s−1 and 350 °C/0.1 s−1, the twins were not exhibited and DRX played a dominant role. Importantly, the obvious split of basal texture was observed. The pyramidal <c+a> slip with high value of Schmid factor was active in large deformed grains, which corresponded to the peak split point in (0001) pole figure. A mechanism about the grain rotation was proposed to explain the relationship between the pyramidal slip and the split of basal texture. Finally, it was found that large number of {10–12} extension twins were formed during the initial stage at condition of 300 °C/1 s−1, and the number of twins decreased with the increase of strain. The twins greatly contributed to the fast formation of basal texture and grain rotation. Moreover, the non-basal slips were active in twining region, which could facilitate the nucleation of DRX.http://www.sciencedirect.com/science/article/pii/S2213956720301912Hot compressionMicrostructureRecrystallizationTextureTwinning |
| spellingShingle | Qian Cheng Liang Chen Jianwei Tang Guoqun Zhao Lu Sun Cunsheng Zhang A comprehensive analysis on microstructure evolution of Mg-5.65Zn-0.66Zr alloy during hot deformation Journal of Magnesium and Alloys Hot compression Microstructure Recrystallization Texture Twinning |
| title | A comprehensive analysis on microstructure evolution of Mg-5.65Zn-0.66Zr alloy during hot deformation |
| title_full | A comprehensive analysis on microstructure evolution of Mg-5.65Zn-0.66Zr alloy during hot deformation |
| title_fullStr | A comprehensive analysis on microstructure evolution of Mg-5.65Zn-0.66Zr alloy during hot deformation |
| title_full_unstemmed | A comprehensive analysis on microstructure evolution of Mg-5.65Zn-0.66Zr alloy during hot deformation |
| title_short | A comprehensive analysis on microstructure evolution of Mg-5.65Zn-0.66Zr alloy during hot deformation |
| title_sort | comprehensive analysis on microstructure evolution of mg 5 65zn 0 66zr alloy during hot deformation |
| topic | Hot compression Microstructure Recrystallization Texture Twinning |
| url | http://www.sciencedirect.com/science/article/pii/S2213956720301912 |
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