Dual-phase synergistically enhancing mechanical properties and thermal conductivity of hot-extruded Mg-8Gd-1Er-8Zn-1Mn alloy
The contradiction between mechanical properties and thermal conductivity of magnesium alloys is a roadblock for their widespread applications. In this study, we developed a hot-extruded Mg-8Gd-1Er-8Zn-1Mn alloy with high-strength and high-thermal-conductivity via dual-phase, W-phase and α-Mn, synerg...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2025-03-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956724001178 |
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| author | Xudong Li Wenbo Du Feng Lou Ning Ding Xian Du Shubo Li |
| author_facet | Xudong Li Wenbo Du Feng Lou Ning Ding Xian Du Shubo Li |
| author_sort | Xudong Li |
| collection | DOAJ |
| description | The contradiction between mechanical properties and thermal conductivity of magnesium alloys is a roadblock for their widespread applications. In this study, we developed a hot-extruded Mg-8Gd-1Er-8Zn-1Mn alloy with high-strength and high-thermal-conductivity via dual-phase, W-phase and α-Mn, synergistically strengthening. The alloy extruded at 300 °C exhibited the yield strength and elongation of 372 MPa and 12%, respectively, it simultaneously demonstrated a high thermal conductivity of 134.3W/(m·K). After extrusion, the original coarse W-phase in the alloy was broken into near-spheroidal particles, which reduced the probability of electron scattering. In addition, a large number of solute atoms dynamically precipitated in the form of nanoscale rod-like W-phase and α-Mn, making α-Mg matrix revert to a nearly periodic arrangement state. The high yield strength of the alloy is predominantly determined by grain boundary strengthening as well as W-phase and α-Mn dual-phase strengthening. Notably, the strategy of dual-phase strengthening provides a valuable approach for developing structure-function integrated Mg alloys. |
| format | Article |
| id | doaj-art-ae277139a49b40bcb15772ff9f8dd0b2 |
| institution | DOAJ |
| issn | 2213-9567 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-ae277139a49b40bcb15772ff9f8dd0b22025-08-20T03:17:51ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672025-03-011331176118610.1016/j.jma.2024.03.026Dual-phase synergistically enhancing mechanical properties and thermal conductivity of hot-extruded Mg-8Gd-1Er-8Zn-1Mn alloyXudong Li0Wenbo Du1Feng Lou2Ning Ding3Xian Du4Shubo Li5College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, ChinaCorresponding author.; College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, ChinaCollege of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, ChinaCollege of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, ChinaCollege of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, ChinaCollege of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, ChinaThe contradiction between mechanical properties and thermal conductivity of magnesium alloys is a roadblock for their widespread applications. In this study, we developed a hot-extruded Mg-8Gd-1Er-8Zn-1Mn alloy with high-strength and high-thermal-conductivity via dual-phase, W-phase and α-Mn, synergistically strengthening. The alloy extruded at 300 °C exhibited the yield strength and elongation of 372 MPa and 12%, respectively, it simultaneously demonstrated a high thermal conductivity of 134.3W/(m·K). After extrusion, the original coarse W-phase in the alloy was broken into near-spheroidal particles, which reduced the probability of electron scattering. In addition, a large number of solute atoms dynamically precipitated in the form of nanoscale rod-like W-phase and α-Mn, making α-Mg matrix revert to a nearly periodic arrangement state. The high yield strength of the alloy is predominantly determined by grain boundary strengthening as well as W-phase and α-Mn dual-phase strengthening. Notably, the strategy of dual-phase strengthening provides a valuable approach for developing structure-function integrated Mg alloys.http://www.sciencedirect.com/science/article/pii/S2213956724001178Mg-RE-Zn alloyW-phaseα-MnThermal conductivityStrength |
| spellingShingle | Xudong Li Wenbo Du Feng Lou Ning Ding Xian Du Shubo Li Dual-phase synergistically enhancing mechanical properties and thermal conductivity of hot-extruded Mg-8Gd-1Er-8Zn-1Mn alloy Journal of Magnesium and Alloys Mg-RE-Zn alloy W-phase α-Mn Thermal conductivity Strength |
| title | Dual-phase synergistically enhancing mechanical properties and thermal conductivity of hot-extruded Mg-8Gd-1Er-8Zn-1Mn alloy |
| title_full | Dual-phase synergistically enhancing mechanical properties and thermal conductivity of hot-extruded Mg-8Gd-1Er-8Zn-1Mn alloy |
| title_fullStr | Dual-phase synergistically enhancing mechanical properties and thermal conductivity of hot-extruded Mg-8Gd-1Er-8Zn-1Mn alloy |
| title_full_unstemmed | Dual-phase synergistically enhancing mechanical properties and thermal conductivity of hot-extruded Mg-8Gd-1Er-8Zn-1Mn alloy |
| title_short | Dual-phase synergistically enhancing mechanical properties and thermal conductivity of hot-extruded Mg-8Gd-1Er-8Zn-1Mn alloy |
| title_sort | dual phase synergistically enhancing mechanical properties and thermal conductivity of hot extruded mg 8gd 1er 8zn 1mn alloy |
| topic | Mg-RE-Zn alloy W-phase α-Mn Thermal conductivity Strength |
| url | http://www.sciencedirect.com/science/article/pii/S2213956724001178 |
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