A Study on the Effect of Ultrasonic Treatment on the Microstructure of Sn-30 wt.% Bi Alloy
1
School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
2
Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Beijing 100084, China
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(10), 1870; https://doi.org/10.3390/ma11101870
Received: 24 August 2018
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Revised: 21 September 2018
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Accepted: 22 September 2018
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Published: 1 October 2018
(This article belongs to the Special Issue Advanced Technology for Materials Synthesis and Processing)
The effect of ultrasonic treatment on the microstructure of Sn-30 wt.% Bi alloy was studied at different temperatures. Results showed that the ultrasonic treatment could effectively refine the microstructure of Sn-30 wt.% Bi alloy at a temperature range between the liquidus and solidus. Application of the ultrasound could fragment the primary Sn dendrites during solidification due to a mixed effect of ultrasonic cavitation and acoustic streaming. The divorced eutectic formed when the ultrasonic treatment was applied for the whole duration of the solidification. The eutectic phase grew and surrounded the primary Sn dendrite, and pure Bi phase grew in between the Sn dendritic fragments. The mechanism of the fragmentation of dendrites and the divorced eutectic structure by ultrasonic treatment was discussed.
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MDPI and ACS Style
Wang, S.; Kang, J.; Zhang, X.; Guo, Z. A Study on the Effect of Ultrasonic Treatment on the Microstructure of Sn-30 wt.% Bi Alloy. Materials 2018, 11, 1870. https://doi.org/10.3390/ma11101870
AMA Style
Wang S, Kang J, Zhang X, Guo Z. A Study on the Effect of Ultrasonic Treatment on the Microstructure of Sn-30 wt.% Bi Alloy. Materials. 2018; 11(10):1870. https://doi.org/10.3390/ma11101870
Chicago/Turabian StyleWang, Shuo, Jinwu Kang, Xiaopeng Zhang, and Zhipeng Guo. 2018. "A Study on the Effect of Ultrasonic Treatment on the Microstructure of Sn-30 wt.% Bi Alloy" Materials 11, no. 10: 1870. https://doi.org/10.3390/ma11101870
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