Transactions of Materials and Heat Treatment

Title：Influence of ultrasonic vibration power on microstructure, microhardness and corrosion resistance property for 2024 aluminum alloy

Authors： Zhang Lijie1 2 Yan Hong1 2

Unit：

KeyWords：

ClassificationCode：TG292

year,vol(issue):pagenumber：2021,46(9):138-144

Abstract：

The influences of different ultrasonic powers, such as 0, 700, 1400 and 2800 W on microstructure, microhardness and corrosion resistance property of 2024 aluminum alloy were studied. The results show that the microstructure, microhardness and corrosion resistance property of 2024 aluminum alloy are improved after ultrasonic treatment. The reason is that the cavitation produced by ultrasonic wave in the melt has a strong effect on the solid particles in the melt to break the primary dendrite and promote the nucleation resulting in the refinement of grain and the optimization of microhardness which is from 98.9 HV to 120.5 HV and the corrosion resistance property of the alloy. The results of weighthessness and hydrogen evolution tests show that compared with the untreated alloy, after the alloy is subjected to ultrasonic vibration treatment of 2800 W, the weighthessness corrosion rate of alloy is reduced from 0.49 mL·(cm2·h)-1 to 0.25 mg·(cm2·h)-1, a decrease of about 49.0%, and the hydrogen evolution corrosion rate is reduced from 0.44 ml(cm2·h)-1 to 0.21 ml·(cm2·h)-1, a decrease of about 52.3%.

Funds：

江西省自然科学基金资助项目（20181BAB206026）

张立杰（1996-），男，硕士研究生 E-mail：185219754@qq.com 通信作者：闫洪（1962-），男，博士，教授 E-mail：yanhong_wh@163.com

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