Effects of pre-aging on microstructure evolution and deformation mechanisms of hot extruded Mg–6Zn–1Gd–1Er Mg alloys
The influence of pre-aging treatment on the microstructure, texture and mechanical properties of the Mg–6Zn–1Gd–1Er (wt.%) alloy was investigated. The microstructure analysis shows that the presence of pre-aging is beneficial to {101¯2} twin nucleation at the early stage of extrusion and inhibits th...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-01-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956721001626 |
| _version_ | 1797900736938377216 |
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| author | Wei Kang Liwei Lu Longbiao Feng Fengchi Lu Chunlei Gan Xiaohui Li |
| author_facet | Wei Kang Liwei Lu Longbiao Feng Fengchi Lu Chunlei Gan Xiaohui Li |
| author_sort | Wei Kang |
| collection | DOAJ |
| description | The influence of pre-aging treatment on the microstructure, texture and mechanical properties of the Mg–6Zn–1Gd–1Er (wt.%) alloy was investigated. The microstructure analysis shows that the presence of pre-aging is beneficial to {101¯2} twin nucleation at the early stage of extrusion and inhibits the growth of twins and promotes the formation of [101¯0]-fiber texture components, thus accelerating the complex process of recrystallization. In the middle stage of extrusion, the extruded samples under the condition of solid solution were subjected to dynamic precipitation during severe shear deformation. The precipitation of the second phase particles followed the particle stimulating nucleation (PSN) mechanism, which increased the volume fraction of DRX grains during extrusion. In the extruded samples under the peak-aged condition, the particles appear dissolved during the severe shear deformation strain, which slows down the DRX process. In the later stage of extrusion, the small rod-shaped particles followed the PSN mechanism, and finally formed the strong fiber texture. The extruded alloy exhibits the strongest mechanical properties under the peak-aged state, with ultimate tensile strength (UTS) of 346 MPa, tensile yield strength (TYS) of 217 MPa, and elongation to failure (EL) of 13.6%. The improvement of mechanical properties is mainly attributed to the existence of strong fiber texture, small rod-shaped and block-shaped phases. |
| first_indexed | 2024-04-10T08:50:47Z |
| format | Article |
| id | doaj.art-f2b320a1accb4d449e2a4d664539c0dd |
| institution | Directory Open Access Journal |
| issn | 2213-9567 |
| language | English |
| last_indexed | 2024-04-10T08:50:47Z |
| publishDate | 2023-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj.art-f2b320a1accb4d449e2a4d664539c0dd2023-02-22T04:30:19ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672023-01-01111317328Effects of pre-aging on microstructure evolution and deformation mechanisms of hot extruded Mg–6Zn–1Gd–1Er Mg alloysWei Kang0Liwei Lu1Longbiao Feng2Fengchi Lu3Chunlei Gan4Xiaohui Li5School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, PR China; Guangdong Institute of Materials and Processing, Guangdong Academy of Sciences, Guangzhou 510650, PR ChinaSchool of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, PR China; Corresponding author.Guangdong Institute of Materials and Processing, Guangdong Academy of Sciences, Guangzhou 510650, PR ChinaGuangdong Institute of Materials and Processing, Guangdong Academy of Sciences, Guangzhou 510650, PR ChinaGuangdong Institute of Materials and Processing, Guangdong Academy of Sciences, Guangzhou 510650, PR China; Corresponding authors at: Guangdong Institute of Materials and Processing, Guangdong Academy of Sciences, Guangzhou 510650, PR China.Guangdong Institute of Materials and Processing, Guangdong Academy of Sciences, Guangzhou 510650, PR China; School of Mechatronics Engineering and Automation, Foshan University, Foshan 528000, PR China; Guangdong Tsing Impulse Science and Technology Co. Ltd., Foshan 528226, PR China; Corresponding authors at: Guangdong Institute of Materials and Processing, Guangdong Academy of Sciences, Guangzhou 510650, PR China.The influence of pre-aging treatment on the microstructure, texture and mechanical properties of the Mg–6Zn–1Gd–1Er (wt.%) alloy was investigated. The microstructure analysis shows that the presence of pre-aging is beneficial to {101¯2} twin nucleation at the early stage of extrusion and inhibits the growth of twins and promotes the formation of [101¯0]-fiber texture components, thus accelerating the complex process of recrystallization. In the middle stage of extrusion, the extruded samples under the condition of solid solution were subjected to dynamic precipitation during severe shear deformation. The precipitation of the second phase particles followed the particle stimulating nucleation (PSN) mechanism, which increased the volume fraction of DRX grains during extrusion. In the extruded samples under the peak-aged condition, the particles appear dissolved during the severe shear deformation strain, which slows down the DRX process. In the later stage of extrusion, the small rod-shaped particles followed the PSN mechanism, and finally formed the strong fiber texture. The extruded alloy exhibits the strongest mechanical properties under the peak-aged state, with ultimate tensile strength (UTS) of 346 MPa, tensile yield strength (TYS) of 217 MPa, and elongation to failure (EL) of 13.6%. The improvement of mechanical properties is mainly attributed to the existence of strong fiber texture, small rod-shaped and block-shaped phases.http://www.sciencedirect.com/science/article/pii/S2213956721001626Mg alloysPre-agingExtrusionTextureDynamic recrystallization |
| spellingShingle | Wei Kang Liwei Lu Longbiao Feng Fengchi Lu Chunlei Gan Xiaohui Li Effects of pre-aging on microstructure evolution and deformation mechanisms of hot extruded Mg–6Zn–1Gd–1Er Mg alloys Journal of Magnesium and Alloys Mg alloys Pre-aging Extrusion Texture Dynamic recrystallization |
| title | Effects of pre-aging on microstructure evolution and deformation mechanisms of hot extruded Mg–6Zn–1Gd–1Er Mg alloys |
| title_full | Effects of pre-aging on microstructure evolution and deformation mechanisms of hot extruded Mg–6Zn–1Gd–1Er Mg alloys |
| title_fullStr | Effects of pre-aging on microstructure evolution and deformation mechanisms of hot extruded Mg–6Zn–1Gd–1Er Mg alloys |
| title_full_unstemmed | Effects of pre-aging on microstructure evolution and deformation mechanisms of hot extruded Mg–6Zn–1Gd–1Er Mg alloys |
| title_short | Effects of pre-aging on microstructure evolution and deformation mechanisms of hot extruded Mg–6Zn–1Gd–1Er Mg alloys |
| title_sort | effects of pre aging on microstructure evolution and deformation mechanisms of hot extruded mg 6zn 1gd 1er mg alloys |
| topic | Mg alloys Pre-aging Extrusion Texture Dynamic recrystallization |
| url | http://www.sciencedirect.com/science/article/pii/S2213956721001626 |
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