Comparison of Thermal Deformation Behavior and Characteristics of Mg-Gd-Y-Zn Alloys with and without Bulk LPSO Phase
Alloys Mg-8Gd-4Y-0.6Zn-0.5Zr (referred to as 0.6Zn) without the bulk long-period stacking ordered (LPSO) phase and Mg-8Gd-4Y-1.1Zn-0.5Zr (referred to as 1.1Zn) containing the bulk LPSO phase were prepared and a series of hot compression tests were conducted to examine and evaluate the influence of t...
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MDPI AG
2023-08-01
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| author | Dongjie Chen Qi Wang Liang Zhang Ting Li Jiawei Yuan Guoliang Shi Xinyu Wang Kui Zhang Yongjun Li |
| author_facet | Dongjie Chen Qi Wang Liang Zhang Ting Li Jiawei Yuan Guoliang Shi Xinyu Wang Kui Zhang Yongjun Li |
| author_sort | Dongjie Chen |
| collection | DOAJ |
| description | Alloys Mg-8Gd-4Y-0.6Zn-0.5Zr (referred to as 0.6Zn) without the bulk long-period stacking ordered (LPSO) phase and Mg-8Gd-4Y-1.1Zn-0.5Zr (referred to as 1.1Zn) containing the bulk LPSO phase were prepared and a series of hot compression tests were conducted to examine and evaluate the influence of the bulk LPSO phase on the thermal deformation behavior and characteristics of the Mg-Gd-Y-Zn-Zr alloy. The bulk LPSO phase affects the dynamic recrystallization behavior, resulting in differences in flow stress between two alloys under different conditions. Specifically, in the temperature range of 380~460 °C, compression at lower strain rates is beneficial for the LPSO phase to promote dynamic recrystallization, while compression at a high strain rate inhibits the dynamic recrystallization due to the severe deformation of the bulk LPSO phase to release the stress concentration instead. The increase in temperature helps the LPSO promote dynamic recrystallization. As a result, the LPSO phase promotes dynamic recrystallization at all experimental strain rates at 500 °C. Furthermore, the thermal processing maps of the 0.6Zn and 1.1Zn alloys are established, and their optimal processing windows are located at 500 °C/0.001~0.01 s<sup>−1</sup> and 500 °C/0.01 s<sup>−1</sup>, respectively. In addition, the instability zones for the 1.1Zn alloy are much larger than that for the 0.6Zn alloy, which corresponds to the microcracks generated at the interfaces between α-Mg and bulk LPSO phases. |
| first_indexed | 2024-03-10T23:18:16Z |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T23:18:16Z |
| publishDate | 2023-08-01 |
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| series | Materials |
| spelling | doaj.art-3e6fe29f0c7a4a33a4c48acc005a92542023-11-19T08:28:06ZengMDPI AGMaterials1996-19442023-08-011617594310.3390/ma16175943Comparison of Thermal Deformation Behavior and Characteristics of Mg-Gd-Y-Zn Alloys with and without Bulk LPSO PhaseDongjie Chen0Qi Wang1Liang Zhang2Ting Li3Jiawei Yuan4Guoliang Shi5Xinyu Wang6Kui Zhang7Yongjun Li8School of Architecture and Civil Engineering, Huanghuai University, Zhumadian 463000, ChinaSchool of Architecture and Civil Engineering, Huanghuai University, Zhumadian 463000, ChinaSchool of Architecture and Civil Engineering, Huanghuai University, Zhumadian 463000, ChinaGuobiao (Beijing) Testing & Certification Co., Ltd., Beijing 100088, ChinaState Key Laboratory of Nonferrous Metals and Process, GRINM Group Co., Ltd., Beijing 100088, ChinaState Key Laboratory of Nonferrous Metals and Process, GRINM Group Co., Ltd., Beijing 100088, ChinaSchool of Architecture and Civil Engineering, Huanghuai University, Zhumadian 463000, ChinaState Key Laboratory of Nonferrous Metals and Process, GRINM Group Co., Ltd., Beijing 100088, ChinaState Key Laboratory of Nonferrous Metals and Process, GRINM Group Co., Ltd., Beijing 100088, ChinaAlloys Mg-8Gd-4Y-0.6Zn-0.5Zr (referred to as 0.6Zn) without the bulk long-period stacking ordered (LPSO) phase and Mg-8Gd-4Y-1.1Zn-0.5Zr (referred to as 1.1Zn) containing the bulk LPSO phase were prepared and a series of hot compression tests were conducted to examine and evaluate the influence of the bulk LPSO phase on the thermal deformation behavior and characteristics of the Mg-Gd-Y-Zn-Zr alloy. The bulk LPSO phase affects the dynamic recrystallization behavior, resulting in differences in flow stress between two alloys under different conditions. Specifically, in the temperature range of 380~460 °C, compression at lower strain rates is beneficial for the LPSO phase to promote dynamic recrystallization, while compression at a high strain rate inhibits the dynamic recrystallization due to the severe deformation of the bulk LPSO phase to release the stress concentration instead. The increase in temperature helps the LPSO promote dynamic recrystallization. As a result, the LPSO phase promotes dynamic recrystallization at all experimental strain rates at 500 °C. Furthermore, the thermal processing maps of the 0.6Zn and 1.1Zn alloys are established, and their optimal processing windows are located at 500 °C/0.001~0.01 s<sup>−1</sup> and 500 °C/0.01 s<sup>−1</sup>, respectively. In addition, the instability zones for the 1.1Zn alloy are much larger than that for the 0.6Zn alloy, which corresponds to the microcracks generated at the interfaces between α-Mg and bulk LPSO phases.https://www.mdpi.com/1996-1944/16/17/5943Mg-Gd-Y-Zn alloythermal deformation behaviorLPSO phasedynamic recrystallization |
| spellingShingle | Dongjie Chen Qi Wang Liang Zhang Ting Li Jiawei Yuan Guoliang Shi Xinyu Wang Kui Zhang Yongjun Li Comparison of Thermal Deformation Behavior and Characteristics of Mg-Gd-Y-Zn Alloys with and without Bulk LPSO Phase Materials Mg-Gd-Y-Zn alloy thermal deformation behavior LPSO phase dynamic recrystallization |
| title | Comparison of Thermal Deformation Behavior and Characteristics of Mg-Gd-Y-Zn Alloys with and without Bulk LPSO Phase |
| title_full | Comparison of Thermal Deformation Behavior and Characteristics of Mg-Gd-Y-Zn Alloys with and without Bulk LPSO Phase |
| title_fullStr | Comparison of Thermal Deformation Behavior and Characteristics of Mg-Gd-Y-Zn Alloys with and without Bulk LPSO Phase |
| title_full_unstemmed | Comparison of Thermal Deformation Behavior and Characteristics of Mg-Gd-Y-Zn Alloys with and without Bulk LPSO Phase |
| title_short | Comparison of Thermal Deformation Behavior and Characteristics of Mg-Gd-Y-Zn Alloys with and without Bulk LPSO Phase |
| title_sort | comparison of thermal deformation behavior and characteristics of mg gd y zn alloys with and without bulk lpso phase |
| topic | Mg-Gd-Y-Zn alloy thermal deformation behavior LPSO phase dynamic recrystallization |
| url | https://www.mdpi.com/1996-1944/16/17/5943 |
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