Effect of Rotating Magnetic Field on the Microstructure and Shear Property of Al/Steel Bimetallic Composite by Compound Casting

IF 3.9 2区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING Acta Metallurgica Sinica-English Letters Pub Date : 2025-01-03 DOI:10.1007/s40195-024-01802-0

Weize Lv, Guowei Zhang, Heqian Song, Dan Zhang, Shiyuan Liu, Hong Xu

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Abstract

Al/steel bimetallic composites were prepared by compound casting, and the effects of the rotating magnetic field on the interfacial microstructure and shear property of bimetallic composite was investigated. The application of rotating magnetic field refined the grain structure of the Al alloy matrix, changed the eutectic Si morphology from coarse lath to needle-like. The rotating magnetic field improved the temperature field and solute distribution of the Al alloy melt, enriched a layer of Si at the interface, and suppressed the growth of intermetallic compounds, the thickness of the interface layer decreased from 44.9 μm to 22.8 μm. The interfacial intermetallic compounds consisted of η-Al₅Fe₂, θ-Al₁₃Fe₄, τ₆-Al_4.5FeSi, τ₅-Al₈Fe₂Si and τ₃-Al₂FeSi, and the addition of the rotating magnetic field did not change phase composition. The rotating magnetic field improved the stress distribution within the interfacial intermetallic compounds, the presence of high-angle grain boundaries retarded crack extension, and the shear strength was enhanced from 31.27 ± 3 MPa to 52.70 ± 4 MPa. This work provides a feasible method for preparing Al/steel bimetallic composite with good bonding property.

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旋转磁场对复合铸造铝/钢双金属复合材料组织和抗剪性能的影响

采用复合铸造法制备了Al/钢双金属复合材料，研究了旋转磁场对复合材料界面组织和剪切性能的影响。旋转磁场的作用细化了铝合金基体的晶粒结构，使共晶Si形貌由粗条状变为针状。旋转磁场改善了Al合金熔体的温度场和溶质分布，在界面处富集了一层Si，抑制了金属间化合物的生长，界面层厚度从44.9 μm减小到22.8 μm。界面金属间化合物由η-Al5Fe2、θ-Al13Fe4、τ6-Al4.5FeSi、τ5-Al8Fe2Si和τ3-Al2FeSi组成，旋转磁场的加入没有改变相组成。旋转磁场改善了界面金属间化合物内部的应力分布，高角度晶界的存在延缓了裂纹扩展，抗剪强度由31.27±3 MPa提高到52.70±4 MPa。为制备具有良好结合性能的铝/钢双金属复合材料提供了一种可行的方法。

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来源期刊

Acta Metallurgica Sinica-English Letters METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

6.60

自引率

14.30%

发文量

122

审稿时长

2 months

期刊介绍： This international journal presents compact reports of significant, original and timely research reflecting progress in metallurgy, materials science and engineering, including materials physics, physical metallurgy, and process metallurgy.