Enhanced Particle Dispersion in Aluminum Melts Using Multi-source Ultrasonic Vibration: Simulation and Experiments

IF 2.6 3区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING
Yeliang Zhu, Xiaogang Fang, Shulin Lv, Shusen Wu, Shifeng Luo, Siliang Yan, Jiguang Liu, Youwen Yang, Yiqing Chen
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Abstract

Due to severe acoustic attenuation, the effectiveness of single-source ultrasonic vibration (SUV) in dispersing reinforcement particles within Al matrix composites is limited, particularly when dealing with high weight fractions. In this study, a short-spacing multi-source ultrasonic vibration (MUV) technique, specifically quad-source ultrasonic vibration (QUV), was introduced to prepare SiCp/A356 composites with a high weight fraction of 15wt.% SiC particles. The characteristic of acoustic streaming and the dispersion of particles were systematically investigated through numerical simulations and physical experiments. The results reveal that QUV mitigates acoustic attenuation and expands the potential cavitation region (exceeding the cavitation threshold of 1.1 MPa) compared to single-source ultrasonic vibration (SUV). The synergistic effect of multiple ultrasonic waves not only elevates cavitation intensity but also enriches the structures of acoustic streaming, significantly reducing agglomeration and improving the dispersion of SiC particles within the Al matrix. Without ultrasonic treatment, only a small proportion of SiC particles are embedded in the Al matrix, with an SSiC/St ratio of merely 2.23%. However, as the number of ultrasonic sources increases, the agglomeration of SiC particles was relieved, and the resultant holes diminish. Remarkably, under QUV treatment, the holes in the composites virtually disappear, and the SSiC/St ratio increases to 9.82%. Additionally, the composites exhibit superior mechanical properties, with a tensile strength of 200 MPa and an elongation of 7.0%, which are 10.5% and 38.5% higher than those achieved using SUV, respectively.

Abstract Image

利用多源超声波振动增强铝熔体中的颗粒分散:模拟与实验
由于声衰减严重,单源超声振动(SUV)在铝基复合材料中分散增强粒子的效果有限,尤其是在处理高重量分数时。在本研究中,引入了一种短间距多源超声振动(MUV)技术,特别是四源超声振动(QUV),用于制备 SiCp/A356 复合材料,其中 SiC 颗粒的重量分数高达 15wt.%。通过数值模拟和物理实验系统地研究了声流特性和颗粒的分散性。结果表明,与单源超声振动(SUV)相比,QUV 可减轻声衰减并扩大潜在空化区域(超过 1.1 MPa 的空化阈值)。多个超声波的协同效应不仅提高了空化强度,还丰富了声流结构,显著减少了团聚,改善了碳化硅颗粒在铝基体中的分散。在未进行超声波处理的情况下,只有一小部分 SiC 颗粒嵌入铝基体中,SSiC/St 比率仅为 2.23%。然而,随着超声源数量的增加,SiC 颗粒的聚集现象得到缓解,由此产生的孔洞也随之减少。值得注意的是,在 QUV 处理过程中,复合材料中的孔洞几乎消失,SSiC/St 比率增加到 9.82%。此外,复合材料还具有优异的机械性能,抗拉强度达到 200 兆帕,伸长率为 7.0%,分别比使用 SUV 时提高了 10.5%和 38.5%。
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来源期刊
International Journal of Metalcasting
International Journal of Metalcasting 工程技术-冶金工程
CiteScore
4.20
自引率
42.30%
发文量
174
审稿时长
>12 weeks
期刊介绍: The International Journal of Metalcasting is dedicated to leading the transfer of research and technology for the global metalcasting industry. The quarterly publication keeps the latest developments in metalcasting research and technology in front of the scientific leaders in our global industry throughout the year. All papers published in the the journal are approved after a rigorous peer review process. The editorial peer review board represents three international metalcasting groups: academia (metalcasting professors), science and research (personnel from national labs, research and scientific institutions), and industry (leading technical personnel from metalcasting facilities).
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