|Title：||Effect of ultrasonic field treatment on degassing of 2024 alloy|
|Author：||*Zheng Jia1, 2, Bing Yu1, Qing Lan1,2, Tong Wang2, Li Fu1, 2, Yu-lin Ma1, Qi-chi Le2 and Jian-zhong Cui2|
|Address：||1. College of Mechanical Engineering, Shenyang University, Shenyang 110044, China; 2. Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China|
|Key words：||ultrasonic degassing; C2Cl6 degasser; hydrogen content; tensile properties|
The 2024 aluminum alloy was prepared with different ultrasonic processes. Effects of ultrasonic treatment parameters including ultrasonic power, treatment time, treatment temperature, and frequency resonance, as well as C2Cl6 degasser on degassing of the 2024 aluminum alloy were investigated. Results indicate that increasing ultrasonic power at the same ultrasonic treatment time can improve the degassing effect. The optimum degassing efficiency can be obtained under the resonant ultrasound condition. With the combination of 1% C2Cl6 addition and 150 W ultrasonic treatment for 40 s, the hydrogen content of the alloy is decreased by 52.9%. At the same time, the tensile strength and elongation are increased by 28.3% and 92.3%, respectively, and the yield strength is slightly increased by 6.7%. The degassing mechanism is also discussed.