Abnormal texture formation and mechanical anisotropy of pre-aging extruded Mg-Gd-Y-Zn-Zr alloy with large-scale
In order to further explore the effect of pre-aging treatment on large-scale alloys, a pre-aging extruded Mg-9.32Gd-4.02Y-2.16Zn-0.48Zr (wt.%) alloy with large extrusion ratio (ER = 19.5) and extrusion temperature of 450 °C in large-scale (Φ308 mm × 800 mm) was investigated in this paper. It exhibit...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422013023 |
| _version_ | 1811180668761145344 |
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| author | Zixuan Wang Jie Zheng Leichen Jia Waner Liu Youwang Huang Zhaoming Yan Zhimin Zhang Yong Xue |
| author_facet | Zixuan Wang Jie Zheng Leichen Jia Waner Liu Youwang Huang Zhaoming Yan Zhimin Zhang Yong Xue |
| author_sort | Zixuan Wang |
| collection | DOAJ |
| description | In order to further explore the effect of pre-aging treatment on large-scale alloys, a pre-aging extruded Mg-9.32Gd-4.02Y-2.16Zn-0.48Zr (wt.%) alloy with large extrusion ratio (ER = 19.5) and extrusion temperature of 450 °C in large-scale (Φ308 mm × 800 mm) was investigated in this paper. It exhibited good properties and a more pronounced anisotropy. The comprehensive performance in the 45° direction was the best. The extrusion direction (ED) presented a high strength, while the transverse direction (TD) showed poor strength and ductility contemporaneously. The main results of strength anisotropy were the alignment orientation of the long-period stacking ordered (LPSO), fine grain strengthening, and texture strengthening. The c-axis of most of the grains in TD samples was perpendicular to the direction of applied stress because of the abnormal <0001>//ED texture, which reduced the ductility. In addition, the formation mechanism of abnormal texture has also been studied. The higher extrusion temperature reduced the critical shear stress (CRSS) of the non-basal slip system, and the higher strain promoted the rotation of the base plane along the principal stress axis under the operation of continuous non-basal slip, resulting in the abnormal <0001>//ED texture due to lattice rotation. On the other hand, dynamic recrystallization (DRX) also greatly affected the generation of the abnormal texture. Firstly, DRX produced a proportion of grains with a nucleation orientation of <0001>, then the subsequent preferential growth of DRX grains led to the vast majority of grains with an orientation tending towards <0001>. However, the former has less effect on abnormal texture than the latter. |
| first_indexed | 2024-04-11T09:06:57Z |
| format | Article |
| id | doaj.art-406420c9ad3c4d3a808612f212587e03 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-11T09:06:57Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-406420c9ad3c4d3a808612f212587e032022-12-22T04:32:36ZengElsevierJournal of Materials Research and Technology2238-78542022-09-012027712783Abnormal texture formation and mechanical anisotropy of pre-aging extruded Mg-Gd-Y-Zn-Zr alloy with large-scaleZixuan Wang0Jie Zheng1Leichen Jia2Waner Liu3Youwang Huang4Zhaoming Yan5Zhimin 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, ChinaBeijing Institute of Astronautical Systems Engineering, Beijing 100076, ChinaBeijing Institute of Space Long March Vehicle, Beijing 100071, ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, China; Corresponding author.School 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 author.In order to further explore the effect of pre-aging treatment on large-scale alloys, a pre-aging extruded Mg-9.32Gd-4.02Y-2.16Zn-0.48Zr (wt.%) alloy with large extrusion ratio (ER = 19.5) and extrusion temperature of 450 °C in large-scale (Φ308 mm × 800 mm) was investigated in this paper. It exhibited good properties and a more pronounced anisotropy. The comprehensive performance in the 45° direction was the best. The extrusion direction (ED) presented a high strength, while the transverse direction (TD) showed poor strength and ductility contemporaneously. The main results of strength anisotropy were the alignment orientation of the long-period stacking ordered (LPSO), fine grain strengthening, and texture strengthening. The c-axis of most of the grains in TD samples was perpendicular to the direction of applied stress because of the abnormal <0001>//ED texture, which reduced the ductility. In addition, the formation mechanism of abnormal texture has also been studied. The higher extrusion temperature reduced the critical shear stress (CRSS) of the non-basal slip system, and the higher strain promoted the rotation of the base plane along the principal stress axis under the operation of continuous non-basal slip, resulting in the abnormal <0001>//ED texture due to lattice rotation. On the other hand, dynamic recrystallization (DRX) also greatly affected the generation of the abnormal texture. Firstly, DRX produced a proportion of grains with a nucleation orientation of <0001>, then the subsequent preferential growth of DRX grains led to the vast majority of grains with an orientation tending towards <0001>. However, the former has less effect on abnormal texture than the latter.http://www.sciencedirect.com/science/article/pii/S2238785422013023Mg-Gd-Y-Zn-ZrMechanical anisotropyAbnormal textureMechanical properties |
| spellingShingle | Zixuan Wang Jie Zheng Leichen Jia Waner Liu Youwang Huang Zhaoming Yan Zhimin Zhang Yong Xue Abnormal texture formation and mechanical anisotropy of pre-aging extruded Mg-Gd-Y-Zn-Zr alloy with large-scale Journal of Materials Research and Technology Mg-Gd-Y-Zn-Zr Mechanical anisotropy Abnormal texture Mechanical properties |
| title | Abnormal texture formation and mechanical anisotropy of pre-aging extruded Mg-Gd-Y-Zn-Zr alloy with large-scale |
| title_full | Abnormal texture formation and mechanical anisotropy of pre-aging extruded Mg-Gd-Y-Zn-Zr alloy with large-scale |
| title_fullStr | Abnormal texture formation and mechanical anisotropy of pre-aging extruded Mg-Gd-Y-Zn-Zr alloy with large-scale |
| title_full_unstemmed | Abnormal texture formation and mechanical anisotropy of pre-aging extruded Mg-Gd-Y-Zn-Zr alloy with large-scale |
| title_short | Abnormal texture formation and mechanical anisotropy of pre-aging extruded Mg-Gd-Y-Zn-Zr alloy with large-scale |
| title_sort | abnormal texture formation and mechanical anisotropy of pre aging extruded mg gd y zn zr alloy with large scale |
| topic | Mg-Gd-Y-Zn-Zr Mechanical anisotropy Abnormal texture Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422013023 |
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