Hot Deformation Behavior and Microstructural Evolution of a TiB<sub>2</sub>/Al-Zn-Mg-Cu-Zr Composite
In the present work, the hot deformation behavior and microstructural evolution of a TiB<sub>2</sub>/Al-Zn-Mg-Cu-Zr composite were studied. Hot compression tests were conducted within a temperature range of 370 °C to 490 °C and a strain rate of 0.001 s<sup>−1</sup> to 10 s<...
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2024-03-01
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| Online Access: | https://www.mdpi.com/1996-1944/17/7/1487 |
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| author | Jingcun Huang Zhilei Xiang Meng Li Leizhe Li Ziyong Chen |
| author_facet | Jingcun Huang Zhilei Xiang Meng Li Leizhe Li Ziyong Chen |
| author_sort | Jingcun Huang |
| collection | DOAJ |
| description | In the present work, the hot deformation behavior and microstructural evolution of a TiB<sub>2</sub>/Al-Zn-Mg-Cu-Zr composite were studied. Hot compression tests were conducted within a temperature range of 370 °C to 490 °C and a strain rate of 0.001 s<sup>−1</sup> to 10 s<sup>−1</sup>. We established the Arrhenius constitutive equation with Zener–Hollomon parameters and processing maps and discussed the microstructural evolution during hot deformation. The results indicated that the safe processing parameter region falls within 370 °C–490 °C and 0.001 s<sup>−1</sup>–0.025 s<sup>−1</sup>. The influence of the strain rate on the safe processing range is more dominant than that of deformation temperature, which is primarily attributed to TiB<sub>2</sub>. Dynamic softening is primarily governed by dynamic recovery (DRV). Small particles (η, Al<sub>3</sub>Zr) can pin dislocations, promoting the rearrangement and annihilation of dislocations and facilitating DRV. Higher temperatures and lower strain rates facilitated dynamic recrystallization (DRX). Continuous dynamic recrystallization (CDRX) occurs near high-angle grain boundaries induced by strain-induced boundary migration (SIBM). TiB<sub>2</sub> and large second-phase particles generate high-density geometrically necessary dislocations (GNBs) during hot deformation, which serve as nucleation sites for discontinuous dynamic recrystallization (DDRX). This enhances dynamic softening and improves formability. |
| first_indexed | 2024-04-24T10:40:52Z |
| format | Article |
| id | doaj.art-1a4d4ec0959744eca504fad3df04a474 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-24T10:40:52Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-1a4d4ec0959744eca504fad3df04a4742024-04-12T13:21:48ZengMDPI AGMaterials1996-19442024-03-01177148710.3390/ma17071487Hot Deformation Behavior and Microstructural Evolution of a TiB<sub>2</sub>/Al-Zn-Mg-Cu-Zr CompositeJingcun Huang0Zhilei Xiang1Meng Li2Leizhe Li3Ziyong Chen4Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, ChinaFaculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, ChinaFaculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, ChinaFaculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, ChinaFaculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, ChinaIn the present work, the hot deformation behavior and microstructural evolution of a TiB<sub>2</sub>/Al-Zn-Mg-Cu-Zr composite were studied. Hot compression tests were conducted within a temperature range of 370 °C to 490 °C and a strain rate of 0.001 s<sup>−1</sup> to 10 s<sup>−1</sup>. We established the Arrhenius constitutive equation with Zener–Hollomon parameters and processing maps and discussed the microstructural evolution during hot deformation. The results indicated that the safe processing parameter region falls within 370 °C–490 °C and 0.001 s<sup>−1</sup>–0.025 s<sup>−1</sup>. The influence of the strain rate on the safe processing range is more dominant than that of deformation temperature, which is primarily attributed to TiB<sub>2</sub>. Dynamic softening is primarily governed by dynamic recovery (DRV). Small particles (η, Al<sub>3</sub>Zr) can pin dislocations, promoting the rearrangement and annihilation of dislocations and facilitating DRV. Higher temperatures and lower strain rates facilitated dynamic recrystallization (DRX). Continuous dynamic recrystallization (CDRX) occurs near high-angle grain boundaries induced by strain-induced boundary migration (SIBM). TiB<sub>2</sub> and large second-phase particles generate high-density geometrically necessary dislocations (GNBs) during hot deformation, which serve as nucleation sites for discontinuous dynamic recrystallization (DDRX). This enhances dynamic softening and improves formability.https://www.mdpi.com/1996-1944/17/7/1487compositeshot deformationconstitutive equationmicrostructure |
| spellingShingle | Jingcun Huang Zhilei Xiang Meng Li Leizhe Li Ziyong Chen Hot Deformation Behavior and Microstructural Evolution of a TiB<sub>2</sub>/Al-Zn-Mg-Cu-Zr Composite Materials composites hot deformation constitutive equation microstructure |
| title | Hot Deformation Behavior and Microstructural Evolution of a TiB<sub>2</sub>/Al-Zn-Mg-Cu-Zr Composite |
| title_full | Hot Deformation Behavior and Microstructural Evolution of a TiB<sub>2</sub>/Al-Zn-Mg-Cu-Zr Composite |
| title_fullStr | Hot Deformation Behavior and Microstructural Evolution of a TiB<sub>2</sub>/Al-Zn-Mg-Cu-Zr Composite |
| title_full_unstemmed | Hot Deformation Behavior and Microstructural Evolution of a TiB<sub>2</sub>/Al-Zn-Mg-Cu-Zr Composite |
| title_short | Hot Deformation Behavior and Microstructural Evolution of a TiB<sub>2</sub>/Al-Zn-Mg-Cu-Zr Composite |
| title_sort | hot deformation behavior and microstructural evolution of a tib sub 2 sub al zn mg cu zr composite |
| topic | composites hot deformation constitutive equation microstructure |
| url | https://www.mdpi.com/1996-1944/17/7/1487 |
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