Zhou Wei, Li Junwen, Bian Yining, Han Xiaoming, Jiang Jufu, Guan Renguo
Key Laboratory of Near-Net Forming of Light Metals of Liaoning Province, Dalian Jiaotong University, Dalian 116028, China; Engineering Research Center of Continuous Extrusion, Ministry of Education, Dalian Jiaotong University, Dalian 116028, China; College of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China.
Key Laboratory of Near-Net Forming of Light Metals of Liaoning Province, Dalian Jiaotong University, Dalian 116028, China; College of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China.
Ultrason Sonochem. 2024 Oct;109:107006. doi: 10.1016/j.ultsonch.2024.107006. Epub 2024 Jul 30.
In this study, the variations in hydrogen content and oxide content in alloys under 0 W, 500 W, 1000 W, 1500 W, 2000 W, 2500 W, 3000 W, and at 20 kHz, 30 kHz, 40 kHz were investigated. Hydrogen content was assessed using porosity and computed tomography, while oxygen content in the alloy was measured using element analyzer and elemental scanning. Compared to other conditions, the melt had the lowest hydrogen and oxide contents at a frequency of 20 kHz and an ultrasonic power of 2500 W, with values of 0.099 cm/100 g and 0.0015 %, respectively. Experimental observations also indicate that the variations in hydrogen content and oxide content in the alloy during ultrasonic treatment are almost similar. In most cases, lower hydrogen content corresponds to lower oxide content in the same alloy. This is because hydrogen bubbles and oxides become a single entity. At the same time, ultrasonic purification increases the tensile strength of the alloy to 200.1 MPa and the elongation rate to 0.72 %. This study primarily investigates the relationship between hydrogen bubbles and oxides in aluminum melt under different ultrasonic frequencies and power levels, providing significant reference for the purification of various fluids under ultrasonic fields.
在本研究中，对合金在0W、500W、1000W、1500W、2000W、2500W、3000W以及20kHz、30kHz、40kHz条件下氢含量和氧化物含量的变化进行了研究。氢含量通过孔隙率和计算机断层扫描进行评估，而合金中的氧含量则使用元素分析仪和元素扫描进行测量。与其他条件相比，熔体在20kHz频率和2500W超声功率下具有最低的氢和氧化物含量，其值分别为0.099cm/100g和0.0015%。实验观察还表明，超声处理过程中合金中氢含量和氧化物含量的变化几乎相似。在大多数情况下，同一合金中较低的氢含量对应较低的氧化物含量。这是因为氢气泡和氧化物形成了一个单一的实体。同时，超声净化使合金的抗拉强度提高到200.1MPa，伸长率提高到0.72%。本研究主要探讨了不同超声频率和功率水平下铝熔体中氢气泡与氧化物之间的关系，为超声场下各种流体的净化提供了重要参考。
