高梯度磁场定向凝固过程中Cu-73.4 wt% Ag合金溶质迁移及显微组织演变

IF 3.5 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Jinmei Sun, Baoze Zhang, Tie Liu, Tianru Zhou, Noriyuki Hirota, Qiang Wang
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引用次数: 0

摘要

在金属材料制备过程中,溶质迁移对金属材料的微观结构有重要影响。在洛伦兹力、磁力等作用的基础上,强磁场在控制合金凝固方面具有巨大的潜力。本文对Cu-73.4 wt% Ag合金在不同梯度磁场下进行了定向凝固实验。研究了梯度磁场对合金定向凝固过程中溶质迁移和组织演变的影响。在没有磁场的情况下,合金呈现出排列整齐的枝晶组织。在均匀磁场作用下,枝晶组织转变为共晶组织。在梯度磁场作用下,合金再次呈现枝晶组织,但取向较差。从排列的枝晶到共晶再到排列不良的枝晶形貌的转变可以归结为洛伦兹力和磁力对Cu溶质在固液界面迁移的共同作用。研究结果为利用高梯度磁场调控合金组织提供了新的思路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Solute migration and microstructure evolution of the hypereutectic Cu-73.4 wt% Ag alloy during directional solidification under high-gradient magnetic fields

During preparation of metallic material, solute migration has a significant effect on the microstructure. High magnetic field has an enormous potential on controlling alloy solidification on the basis of Lorentz force, magnetic force, etc. In this work, directional solidification experiments of a Cu-73.4 wt% Ag alloy have been conducted under different gradient magnetic fields. The effects of gradient magnetic fields on the solute migration and microstructure evolution of the alloys during the directional solidification process have been investigated. Without magnetic field, the alloy showed an aligned dendritic microstructure. Under a uniform magnetic field, the dendritic microstructure transformed to a eutectic morphology. Under a gradient magnetic field, the alloy exhibited again the dendritic microstructure, but with poor alignment. The transformation of the microstructure from aligned dendritic to eutectic to poor aligned dendritic morphology can be attributed to the combining effects of the Lorentz force and magnetic force on the migration of Cu solute at the solid/liquid interface. The results of this work provide a new insight to regulating the microstructure of alloys using high gradient magnetic fields.

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来源期刊
Journal of Materials Science
Journal of Materials Science 工程技术-材料科学:综合
CiteScore
7.90
自引率
4.40%
发文量
1297
审稿时长
2.4 months
期刊介绍: The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.
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