Xudong Li, Wenbo Du, Feng Lou, Ning Ding, Xian Du, Shubo Li
{"title":"双相协同增强热挤压 Mg-8Gd-1Er-8Zn-1Mn 合金的机械性能和导热性能","authors":"Xudong Li, Wenbo Du, Feng Lou, Ning Ding, Xian Du, Shubo Li","doi":"10.1016/j.jma.2024.03.026","DOIUrl":null,"url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"13 3","pages":"Pages 1176-1186"},"PeriodicalIF":15.8000,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dual-phase synergistically enhancing mechanical properties and thermal conductivity of hot-extruded Mg-8Gd-1Er-8Zn-1Mn alloy\",\"authors\":\"Xudong Li, Wenbo Du, Feng Lou, Ning Ding, Xian Du, Shubo Li\",\"doi\":\"10.1016/j.jma.2024.03.026\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>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.</div></div>\",\"PeriodicalId\":16214,\"journal\":{\"name\":\"Journal of Magnesium and Alloys\",\"volume\":\"13 3\",\"pages\":\"Pages 1176-1186\"},\"PeriodicalIF\":15.8000,\"publicationDate\":\"2025-03-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Magnesium and Alloys\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2213956724001178\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"METALLURGY & METALLURGICAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Magnesium and Alloys","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2213956724001178","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
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, 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.
期刊介绍:
The Journal of Magnesium and Alloys serves as a global platform for both theoretical and experimental studies in magnesium science and engineering. It welcomes submissions investigating various scientific and engineering factors impacting the metallurgy, processing, microstructure, properties, and applications of magnesium and alloys. The journal covers all aspects of magnesium and alloy research, including raw materials, alloy casting, extrusion and deformation, corrosion and surface treatment, joining and machining, simulation and modeling, microstructure evolution and mechanical properties, new alloy development, magnesium-based composites, bio-materials and energy materials, applications, and recycling.