Numerical Simulation of Ultrasonic Cavitation in Zn-Al Alloy and Study on Its Grain Refinement and Strengthening Mechanism
CHEN Haiyan1,*, WANG Chao1, PAN Meishi1, JI Xixi1, ZENG Yue1, AN Yibo1, ZOU Yancheng2
1 School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China 2 Huizhou Huiyang Guangjie Hardware Products Co., Ltd., Huizhou 516221, Guangdong, China
Abstract: In order to study the effect of ultrasonic on the microstructure and properties of ZnAl8 alloy, ultrasonic melting experiments with different po-wer were carried out in the molten pool of ZnAl8 alloy at 390 ℃. In combination with numerical analysis method to solve the KM-polytropic and Mettin equations, the growth law and cavitation effect of ultrasonic cavitation and bubble group in the molten pool of ZnAl8 alloy were studied.The results showed that when ultrasound was 700 W, the application of ultrasonic vibration in the solid-liquid coexistence zone at 390 ℃ effectively eliminated the dendritic structure,the pulse pressure generated by ultrasonic reached more than 200 MPa, the bubble wall temperature reached as high as 3 200 K, and the effective crushing and pre-precipitated α(Al) phase were carried out and the fragments became nucleation points of crystallization. After solidification, uniform α(Al) phase microstructures were obtained. The elongation after fracture of the as-cast alloy was 13.62%, and the tensile strength reached 232 MPa, in contrast to conventional melt casting techniques without ultrasonic, the plasticity and strength of the alloy were increased by 48% and 12%, respectively.
陈海燕, 王超, 潘美诗, 吉西西, 曾越, 安义博, 邹燕成. Zn-Al合金超声空化数值模拟和细晶强化机理研究[J]. 材料导报, 2023, 37(7): 21090048-6.
CHEN Haiyan, WANG Chao, PAN Meishi, JI Xixi, ZENG Yue, AN Yibo, ZOU Yancheng. Numerical Simulation of Ultrasonic Cavitation in Zn-Al Alloy and Study on Its Grain Refinement and Strengthening Mechanism. Materials Reports, 2023, 37(7): 21090048-6.
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2023, Vol. 37 
