Dynamic recrystallization mechanisms and microstructure evolution of a novel Al-Zn-Mg-Cu-Zr alloy by isothermal compression
The dynamic recrystallization (DRX) behavior and microstructure evolution of a novel Al-Zn-Mg-Cu-Zr alloy was investigated by isothermal compression tests at temperature of 350–470 °C and strain rate of 0.0001–1 s−1. The results showed that the flow behavior revealed typical dynamic recovery (DRV) c...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424022051 |
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| author | Mengjun Long Feng Jiang Yuanming Su Zeyu Xiao |
| author_facet | Mengjun Long Feng Jiang Yuanming Su Zeyu Xiao |
| author_sort | Mengjun Long |
| collection | DOAJ |
| description | The dynamic recrystallization (DRX) behavior and microstructure evolution of a novel Al-Zn-Mg-Cu-Zr alloy was investigated by isothermal compression tests at temperature of 350–470 °C and strain rate of 0.0001–1 s−1. The results showed that the flow behavior revealed typical dynamic recovery (DRV) characteristics at a high strain rate (1 s−1), while exhibited a DRX shape when the strain rate decreased. The critical strains (εc) of the DRX decreased with the decrease of strain rate or the increase of deformation temperature. A low temperature was conductive to precipitation behavior, the coarse precipitates and dispersed Al3Zr particles would pin the dislocations and substructures, which inhibit the DRX process. The DRX mechanism of the Al-Zn-Mg-Cu-Zr alloy was dominated by continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) during the hot deformation process, upon increasing the temperature and decreasing the strain rate, there was a transition point of DRX mechanism from DDRX to CDRX. Moreover, the linear relationship between the Zener-Hollomon (Z) parameter and DRX grain size was established for the further exploration of the transition of the dominant DRX mechanism. |
| format | Article |
| id | doaj-art-6064e3312b604bdeaed9180e55a46c8b |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-6064e3312b604bdeaed9180e55a46c8b2025-08-20T02:39:08ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01331740175510.1016/j.jmrt.2024.09.200Dynamic recrystallization mechanisms and microstructure evolution of a novel Al-Zn-Mg-Cu-Zr alloy by isothermal compressionMengjun Long0Feng Jiang1Yuanming Su2Zeyu Xiao3School of Material Science and Engineering, Central South University, Changsha, 410083, ChinaSchool of Material Science and Engineering, Central South University, Changsha, 410083, China; Light Alloy Research Institute, Central South University, Changsha, 410083, China; Corresponding author. School of Material Science and Engineering, Central South University, Changsha, 410083, China.School of Material Science and Engineering, Central South University, Changsha, 410083, ChinaLight Alloy Research Institute, Central South University, Changsha, 410083, ChinaThe dynamic recrystallization (DRX) behavior and microstructure evolution of a novel Al-Zn-Mg-Cu-Zr alloy was investigated by isothermal compression tests at temperature of 350–470 °C and strain rate of 0.0001–1 s−1. The results showed that the flow behavior revealed typical dynamic recovery (DRV) characteristics at a high strain rate (1 s−1), while exhibited a DRX shape when the strain rate decreased. The critical strains (εc) of the DRX decreased with the decrease of strain rate or the increase of deformation temperature. A low temperature was conductive to precipitation behavior, the coarse precipitates and dispersed Al3Zr particles would pin the dislocations and substructures, which inhibit the DRX process. The DRX mechanism of the Al-Zn-Mg-Cu-Zr alloy was dominated by continuous dynamic recrystallization (CDRX) and discontinuous dynamic recrystallization (DDRX) during the hot deformation process, upon increasing the temperature and decreasing the strain rate, there was a transition point of DRX mechanism from DDRX to CDRX. Moreover, the linear relationship between the Zener-Hollomon (Z) parameter and DRX grain size was established for the further exploration of the transition of the dominant DRX mechanism.http://www.sciencedirect.com/science/article/pii/S2238785424022051Al-Zn-Mg-Cu-Zr alloyHot deformationMicrostructure evolutionDRX mechanism |
| spellingShingle | Mengjun Long Feng Jiang Yuanming Su Zeyu Xiao Dynamic recrystallization mechanisms and microstructure evolution of a novel Al-Zn-Mg-Cu-Zr alloy by isothermal compression Journal of Materials Research and Technology Al-Zn-Mg-Cu-Zr alloy Hot deformation Microstructure evolution DRX mechanism |
| title | Dynamic recrystallization mechanisms and microstructure evolution of a novel Al-Zn-Mg-Cu-Zr alloy by isothermal compression |
| title_full | Dynamic recrystallization mechanisms and microstructure evolution of a novel Al-Zn-Mg-Cu-Zr alloy by isothermal compression |
| title_fullStr | Dynamic recrystallization mechanisms and microstructure evolution of a novel Al-Zn-Mg-Cu-Zr alloy by isothermal compression |
| title_full_unstemmed | Dynamic recrystallization mechanisms and microstructure evolution of a novel Al-Zn-Mg-Cu-Zr alloy by isothermal compression |
| title_short | Dynamic recrystallization mechanisms and microstructure evolution of a novel Al-Zn-Mg-Cu-Zr alloy by isothermal compression |
| title_sort | dynamic recrystallization mechanisms and microstructure evolution of a novel al zn mg cu zr alloy by isothermal compression |
| topic | Al-Zn-Mg-Cu-Zr alloy Hot deformation Microstructure evolution DRX mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424022051 |
| work_keys_str_mv | AT mengjunlong dynamicrecrystallizationmechanismsandmicrostructureevolutionofanovelalznmgcuzralloybyisothermalcompression AT fengjiang dynamicrecrystallizationmechanismsandmicrostructureevolutionofanovelalznmgcuzralloybyisothermalcompression AT yuanmingsu dynamicrecrystallizationmechanismsandmicrostructureevolutionofanovelalznmgcuzralloybyisothermalcompression AT zeyuxiao dynamicrecrystallizationmechanismsandmicrostructureevolutionofanovelalznmgcuzralloybyisothermalcompression |