Effect of Ultrasonic Vibration Treatment on Microstructure and Properties of Semi-Solid SnSbCu11-6 Alloy

IF 4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2025-03-16 DOI:10.1007/s12540-025-01930-x

Xiaobin Luo, Lei Wang, Hongbo Lu, Jinzhi Peng, Yuanwei Jia, Yongkun Li, Rongfeng Zhou

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Abstract

SnSbCu11-6 alloy is a commercial material for plain bearings, and the size and distribution of phases in the microstructure determine the properties and application of the material. In this paper, SnSbCu11-6 alloy semi-solid slurry was prepared by ultrasonic vibration treatment (UVT) process. The effects of UVT termination temperature on microstructure size, distribution and properties were studied. The results show that UVT can significantly refine the SnSb phase and Cu₆Sn₅ phase and improve the distribution uniformity. The SnSb phase are tightly bound to the matrix α-Sn phase and exist semi-coherent interface matching in (111)_SnSb//(200)_α−Sn. On the contrary, the Cu₆Sn₅/α-Sn interface is clear and well-bonded but no orientation relationship exists. The average grain size of SnSb phase and the average length of Cu₆Sn₅ phase decreased first and then increased with the decrease of the termination temperature of UVT. The optimal termination temperature of the UVT is 260 ℃ near the precipitation temperature of SnSb phase, at which the average grain size of SnSb phase is 48.8 ± 8.8 μm and the average length of Cu₆Sn₅ phase is 10 ± 4.2 μm. The tensile strength and elongation are 70.3 MPa and 3.6%, respectively, which are 6.0% and 140% higher than that of liquid casting. It is likely attributed to the fine grain strengthening with the semi-coherent interface SnSb phase and microstructure homogenization. Moreover, the fracture mechanism indicates that the fine SnSb phase can effectively prevent crack propagation and significantly improve the plasticity of the alloy. This work can make a significant contribution to the preparation of high performance tin-based babbitt alloy.

Graphic Abstract

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超声振动处理对半固态SnSbCu11-6合金组织和性能的影响

SnSbCu11-6合金是一种用于滑动轴承的商用材料，微观组织中相的大小和分布决定了材料的性能和应用。采用超声振动处理（UVT）工艺制备了SnSbCu11-6合金半固态浆料。研究了UVT终止温度对材料微观结构尺寸、分布和性能的影响。结果表明：UVT能显著细化SnSb相和Cu6Sn5相，改善其分布均匀性；SnSb相与基体α-Sn相紧密结合，在（111）SnSb//(200)α−Sn中存在半相干界面匹配。相反，Cu6Sn5/α-Sn界面清晰且键合良好，但不存在取向关系。随着UVT终止温度的降低，SnSb相的平均晶粒尺寸和Cu6Sn5相的平均长度先减小后增大。UVT的最佳终止温度为260℃，接近SnSb相析出温度，此时SnSb相的平均晶粒尺寸为48.8±8.8 μm， Cu6Sn5相的平均长度为10±4.2 μm。抗拉强度和伸长率分别为70.3 MPa和3.6%，分别比液态铸造提高6.0%和140%。这可能是由半共格界面SnSb相的细晶粒强化和组织均匀化所致。断裂机理表明，细小的SnSb相可以有效地阻止裂纹扩展，显著提高合金的塑性。该工作对制备高性能锡基巴氏合金具有重要意义。图形抽象

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来源期刊

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.