Investigation into Mg-4.5Al-2.5Zn Mg alloy applying cryogenic treatment and cross-rolling at diverse temperatures
In the paper, the Mg-4.5Al-2.5Zn plates were processed by cryogenic treatment after cross-rolling with different temperatures to explore the impact of cross-rolling temperatures and cryogenic treatment on microstructure and mechanical properties. Electron backscatter diffraction (EBSD), transmission...
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Elsevier
2025-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425016114 |
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| author | Haoran Pang Liwei Lu Rui Yang Min Ma Xiaojun Wang Yujuan Wu Lei Jing Jun Dong Shaowei Zhang |
| author_facet | Haoran Pang Liwei Lu Rui Yang Min Ma Xiaojun Wang Yujuan Wu Lei Jing Jun Dong Shaowei Zhang |
| author_sort | Haoran Pang |
| collection | DOAJ |
| description | In the paper, the Mg-4.5Al-2.5Zn plates were processed by cryogenic treatment after cross-rolling with different temperatures to explore the impact of cross-rolling temperatures and cryogenic treatment on microstructure and mechanical properties. Electron backscatter diffraction (EBSD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) were used to analyze the mechanisms. The results demonstrate that the cryogenic treatment after cross-rolling can improve the mechanical properties and microstructure of Mg-4.5Al-2.5Zn alloy. With the rising of hot rolling temperature, the strength and ductility increase firstly and then decrease. The sample processed by cryogenic treatment after hot cross-rolling at 370 °C presents the highest strength (∼305.6 MPa) and ductility (∼17 %), which can be ascribed to fine grains, relatively high dislocation density, precipitates and weak basal texture. In this sample, the average grain size can be refined to 3.4 μm due to high extent dynamic recrystallization (DRX) caused by high density dislocation and grain boundary migeration, some Al8Mn5 precipitates distributed along grain boundaries, pinning the grain boundary. Weakening of the basal texture is concerned with the activation of prismatic <a> slip, pyramidal <a> slip and pyramidal <c+a> slip and the change of orientation of grain. |
| format | Article |
| id | doaj-art-3bf3a6e1742b41c1a610ffb6fe5ca88d |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-3bf3a6e1742b41c1a610ffb6fe5ca88d2025-08-20T02:37:24ZengElsevierJournal of Materials Research and Technology2238-78542025-07-01374064407610.1016/j.jmrt.2025.06.189Investigation into Mg-4.5Al-2.5Zn Mg alloy applying cryogenic treatment and cross-rolling at diverse temperaturesHaoran Pang0Liwei Lu1Rui Yang2Min Ma3Xiaojun Wang4Yujuan Wu5Lei Jing6Jun Dong7Shaowei Zhang8Sanya Institute of Hunan University of Science and Technology, Sanya, 572024, ChinaSanya Institute of Hunan University of Science and Technology, Sanya, 572024, China; cqullw@163.comSanya Institute of Hunan University of Science and Technology, Sanya, 572024, ChinaSanya Institute of Hunan University of Science and Technology, Sanya, 572024, ChinaNational Key Laboratory of Precision Hot Processing of Metal, Harbin Institute of Technology, Harbin, 150001, China; Hunan Rongtuo New Material Research Co.,Ltd., Xiangtan, 411201, ChinaNational Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, 200240, China; wuyj@sjtu.edu.cnNorthwest Nonferrous Metal Baoji Innovation Research Institute, Baoji, 721000, ChinaDepartment of Orthopaedics, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, China; dongjun_orth@xjtu.edu.cnSchool of Chemistry and Chemical Engineering, Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of the Ministry of Education, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, China; swzhang@hnust.edu.cnIn the paper, the Mg-4.5Al-2.5Zn plates were processed by cryogenic treatment after cross-rolling with different temperatures to explore the impact of cross-rolling temperatures and cryogenic treatment on microstructure and mechanical properties. Electron backscatter diffraction (EBSD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) were used to analyze the mechanisms. The results demonstrate that the cryogenic treatment after cross-rolling can improve the mechanical properties and microstructure of Mg-4.5Al-2.5Zn alloy. With the rising of hot rolling temperature, the strength and ductility increase firstly and then decrease. The sample processed by cryogenic treatment after hot cross-rolling at 370 °C presents the highest strength (∼305.6 MPa) and ductility (∼17 %), which can be ascribed to fine grains, relatively high dislocation density, precipitates and weak basal texture. In this sample, the average grain size can be refined to 3.4 μm due to high extent dynamic recrystallization (DRX) caused by high density dislocation and grain boundary migeration, some Al8Mn5 precipitates distributed along grain boundaries, pinning the grain boundary. Weakening of the basal texture is concerned with the activation of prismatic <a> slip, pyramidal <a> slip and pyramidal <c+a> slip and the change of orientation of grain.http://www.sciencedirect.com/science/article/pii/S2238785425016114Mg-4.5Al-2.5Zn Mg alloyCross-rolling temperatureCryogenic treatmentMicrostructureMechanical properties |
| spellingShingle | Haoran Pang Liwei Lu Rui Yang Min Ma Xiaojun Wang Yujuan Wu Lei Jing Jun Dong Shaowei Zhang Investigation into Mg-4.5Al-2.5Zn Mg alloy applying cryogenic treatment and cross-rolling at diverse temperatures Journal of Materials Research and Technology Mg-4.5Al-2.5Zn Mg alloy Cross-rolling temperature Cryogenic treatment Microstructure Mechanical properties |
| title | Investigation into Mg-4.5Al-2.5Zn Mg alloy applying cryogenic treatment and cross-rolling at diverse temperatures |
| title_full | Investigation into Mg-4.5Al-2.5Zn Mg alloy applying cryogenic treatment and cross-rolling at diverse temperatures |
| title_fullStr | Investigation into Mg-4.5Al-2.5Zn Mg alloy applying cryogenic treatment and cross-rolling at diverse temperatures |
| title_full_unstemmed | Investigation into Mg-4.5Al-2.5Zn Mg alloy applying cryogenic treatment and cross-rolling at diverse temperatures |
| title_short | Investigation into Mg-4.5Al-2.5Zn Mg alloy applying cryogenic treatment and cross-rolling at diverse temperatures |
| title_sort | investigation into mg 4 5al 2 5zn mg alloy applying cryogenic treatment and cross rolling at diverse temperatures |
| topic | Mg-4.5Al-2.5Zn Mg alloy Cross-rolling temperature Cryogenic treatment Microstructure Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425016114 |
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