低频电磁铸造改善AZ91D镁合金方坯组织和力学性能的不均匀性

IF 3.3 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Biaobiao Liu, Lei Song, Hongxia Wang, Jian Wang, Quanfu Zhang, Naidong Ren, Lifei Wang, Weili Cheng, Hua Hou, Kwang Seon Shin
{"title":"低频电磁铸造改善AZ91D镁合金方坯组织和力学性能的不均匀性","authors":"Biaobiao Liu,&nbsp;Lei Song,&nbsp;Hongxia Wang,&nbsp;Jian Wang,&nbsp;Quanfu Zhang,&nbsp;Naidong Ren,&nbsp;Lifei Wang,&nbsp;Weili Cheng,&nbsp;Hua Hou,&nbsp;Kwang Seon Shin","doi":"10.1007/s12540-024-01823-5","DOIUrl":null,"url":null,"abstract":"<div><p>The effects of low-frequency electromagnetic field on the homogeneity of microstructure and mechanical properties of Φ530 mm AZ91D magnesium alloy were investigated. Given the Lorentz force, velocity variations and temperature distribution under different electromagnetic conditions, the grain refinement mechanism and improving microstructure uniformity by low-frequency electromagnetic field were discussed in detail. Results show that the grain sizes decreased from 224.91–355.29 μm (direct-chill (DC) casting) to 203.91–235.56 μm at the frequency of 17 Hz, and the thick dendrites disappeared. The low-frequency electromagnetic field can increase the nucleation driving force of α-Mg and reduce the critical nucleus radius, thereby enhancing the nucleation rate. Additionally, forced convection could reintroduce fractured dendrites into the melt, thereby promoting heterogeneous nucleation. The precipitation of the β-Mg<sub>17</sub>Al<sub>12</sub> was promoted as a result of the low-frequency electromagnetic field accelerating the cooling rate of the melt. Al<sup>3+</sup> moved in a helical trajectory towards the edge of the ingot under the influence of the magnetic field, resulting in a significantly higher content of the β-Mg<sub>17</sub>Al<sub>12</sub> at R/2 and the edge of the ingot. In addition, the application of a low-frequency electromagnetic field enhanced the mechanical properties of the alloy while diminishing the performance disparity between different regions of the casting.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":703,"journal":{"name":"Metals and Materials International","volume":"31 5","pages":"1479 - 1495"},"PeriodicalIF":3.3000,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Improved Microstructural and Mechanical Properties Inhomogeneity of a Large-Scale AZ91D Magnesium Alloy Billet by Low-Frequency Electromagnetic Casting\",\"authors\":\"Biaobiao Liu,&nbsp;Lei Song,&nbsp;Hongxia Wang,&nbsp;Jian Wang,&nbsp;Quanfu Zhang,&nbsp;Naidong Ren,&nbsp;Lifei Wang,&nbsp;Weili Cheng,&nbsp;Hua Hou,&nbsp;Kwang Seon Shin\",\"doi\":\"10.1007/s12540-024-01823-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The effects of low-frequency electromagnetic field on the homogeneity of microstructure and mechanical properties of Φ530 mm AZ91D magnesium alloy were investigated. Given the Lorentz force, velocity variations and temperature distribution under different electromagnetic conditions, the grain refinement mechanism and improving microstructure uniformity by low-frequency electromagnetic field were discussed in detail. Results show that the grain sizes decreased from 224.91–355.29 μm (direct-chill (DC) casting) to 203.91–235.56 μm at the frequency of 17 Hz, and the thick dendrites disappeared. The low-frequency electromagnetic field can increase the nucleation driving force of α-Mg and reduce the critical nucleus radius, thereby enhancing the nucleation rate. Additionally, forced convection could reintroduce fractured dendrites into the melt, thereby promoting heterogeneous nucleation. The precipitation of the β-Mg<sub>17</sub>Al<sub>12</sub> was promoted as a result of the low-frequency electromagnetic field accelerating the cooling rate of the melt. Al<sup>3+</sup> moved in a helical trajectory towards the edge of the ingot under the influence of the magnetic field, resulting in a significantly higher content of the β-Mg<sub>17</sub>Al<sub>12</sub> at R/2 and the edge of the ingot. In addition, the application of a low-frequency electromagnetic field enhanced the mechanical properties of the alloy while diminishing the performance disparity between different regions of the casting.</p><h3>Graphical Abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":703,\"journal\":{\"name\":\"Metals and Materials International\",\"volume\":\"31 5\",\"pages\":\"1479 - 1495\"},\"PeriodicalIF\":3.3000,\"publicationDate\":\"2024-10-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Metals and Materials International\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s12540-024-01823-5\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Metals and Materials International","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s12540-024-01823-5","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

摘要

研究了低频电磁场对Φ530 mm AZ91D镁合金组织均匀性和力学性能的影响。考虑不同电磁条件下的洛伦兹力、速度变化和温度分布,详细讨论了低频电磁场细化晶粒的机理和提高组织均匀性的方法。结果表明:在17 Hz频率下,直接冷铸的晶粒尺寸从224.91 ~ 355.29 μm减小到203.91 ~ 235.56 μm,粗枝晶消失;低频电磁场可以增大α-Mg的成核驱动力,降低临界核半径,从而提高成核速率。此外,强制对流可以将断裂的枝晶重新引入熔体,从而促进非均质成核。低频电磁场加速了熔体的冷却速度,促进了β-Mg17Al12的析出。在磁场的影响下,Al3+沿螺旋轨迹向铸锭边缘移动,导致R/2和铸锭边缘处β-Mg17Al12含量显著升高。此外,低频电磁场的应用提高了合金的力学性能,同时减小了铸件不同区域之间的性能差异。图形抽象
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Improved Microstructural and Mechanical Properties Inhomogeneity of a Large-Scale AZ91D Magnesium Alloy Billet by Low-Frequency Electromagnetic Casting

The effects of low-frequency electromagnetic field on the homogeneity of microstructure and mechanical properties of Φ530 mm AZ91D magnesium alloy were investigated. Given the Lorentz force, velocity variations and temperature distribution under different electromagnetic conditions, the grain refinement mechanism and improving microstructure uniformity by low-frequency electromagnetic field were discussed in detail. Results show that the grain sizes decreased from 224.91–355.29 μm (direct-chill (DC) casting) to 203.91–235.56 μm at the frequency of 17 Hz, and the thick dendrites disappeared. The low-frequency electromagnetic field can increase the nucleation driving force of α-Mg and reduce the critical nucleus radius, thereby enhancing the nucleation rate. Additionally, forced convection could reintroduce fractured dendrites into the melt, thereby promoting heterogeneous nucleation. The precipitation of the β-Mg17Al12 was promoted as a result of the low-frequency electromagnetic field accelerating the cooling rate of the melt. Al3+ moved in a helical trajectory towards the edge of the ingot under the influence of the magnetic field, resulting in a significantly higher content of the β-Mg17Al12 at R/2 and the edge of the ingot. In addition, the application of a low-frequency electromagnetic field enhanced the mechanical properties of the alloy while diminishing the performance disparity between different regions of the casting.

Graphical Abstract

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Metals and Materials International
Metals and Materials International 工程技术-材料科学:综合
CiteScore
7.10
自引率
8.60%
发文量
197
审稿时长
3.7 months
期刊介绍: Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信