强磁场下金属凝固过程中的溶质迁移行为及组织演变  

Solute Migration Behavior and Microstructure Evolution During Metal Solidification under High Magnetic Field

作　　者：周天儒 刘铁 阎金戈 孙金妹 袁双 王强 ZHOU Tianru;LIU Tie;YAN Jinge;SUN Jinmei;YUAN Shuang;WANG Qiang(Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education),Northeastern University,Shenyang 110819,China;School of Metallurgy,Northeastern University,Shenyang 110819,China;School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110819 [2]东北大学冶金学院,辽宁沈阳110819 [3]东北大学材料科学与工程学院,辽宁沈阳110819

出　　处：《铸造技术》2022年第8期573-584,I0030,共13页Foundry Technology

基　　金：国家自然科学基金(51690161);凝固技术国家重点实验室开放课题(SKLSP202101)。

摘　　要：凝固过程是金属材料加工制备中的重要步骤,对金属材料最终的性能起决定作用。熔体流动、溶质迁移、固/液界面形貌演变等是凝固过程中的重要现象,其中合金熔体凝固过程中的溶质迁移行为决定了晶体生长情况和凝固组织的形成。有效地调控溶质迁移,可以改变固/液界面形貌,重塑凝固组织结构。本文综述了强磁场下金属凝固过程中溶质迁移及组织演变,分析了强磁场各种效果的作用机制,介绍了强磁场控制溶质迁移行为及凝固组织演变的具体效果,并提出了功能材料制备的发展方向。The solidification process is an important step in preparation of metal materials and plays a decisive role in the final properties of metal materials.Melt flow,solute migration and the evolution of solid-liquid interface morphology are important phenomena in the solidification process.The solute migration behavior in the solidification process of alloy melt determines the crystal growth and the formation of solidification structure.Effectively regulating solute migration can change the morphology of solid/liquid interface and reshape the solidification structure.In this paper,the solute migration and microstructure evolution during metal solidification under strong magnetic field is reviewed,the action mechanism of various effects of strong magnetic field is analyzed,the specific effects of strong magnetic field on solute migration behavior and microstructure evolution is introduced,and the development direction of functional material preparation is also proposed.

关 键 词：强磁场 梯度磁场 溶质迁移 凝固组织 成分过冷 

分 类 号：TG111.4[金属学及工艺—物理冶金] TG111.6[金属学及工艺—金属学]