Publications by authors named "Ripeng Jiang"
Effect of low-intensity ultrasound on grain refinement and heterogeneous nucleation mechanism of 2219 Al alloy.
Ultrason Sonochem
June 2025
The ultrasonic cavitation and acoustic streaming have long been regarded as the dominant mechanisms for refining the solidification microstructure of Aluminum (Al) alloys. This work investigated the effects of low-intensity ultrasound on the solidification microstructure of 2219 Al alloy by setting an ultrasonic application angle of 15° and with the different depths (30 mm, 70 mm, and 110 mm). The experimental results show that low-intensity ultrasound can also achieve a significant refining effect on the microstructure.
View Article and Find Full Text PDFMicrostructural evolution and mechanical properties of TiB/2195 composites fabricated by ultrasonic-assisted in-situ casting.
Ultrason Sonochem
November 2022
Article Synopsis
- The size and distribution of particles in aluminum matrix composites significantly influence their mechanical properties.
- 2 wt.% TiB/2195 composites were created using ultrasonic-assisted in-situ casting, leading to improved microstructure and mechanical characteristics.
- Ultrasonic treatment (UT) effectively refined grains, minimized defects, and enhanced tensile and yield strength by substantial percentages compared to both the remelted matrix and untreated composites.
- The study further explored how the combination of UT and TiB particles contributed to the improved properties of the composites.
Effect of Ultrasonic-Assisted Casting on the Hydrogen and Lithium Content of Al-Li Alloy.
Materials (Basel)
January 2022
Dehydrogenation of the 2195 Al-Li alloy was accomplished using argon degassing, ultrasonic degassing, and vacuum degassing. The concentration of hydrogen, its microstructure, and its mechanical characteristics were all investigated. The hydrogen content in the 2195 Al-Li alloy is high.
View Article and Find Full Text PDFArticle Synopsis
- Ultrasonic sonotrodes are crucial for delivering power ultrasound in large-scale metallic casting but suffer from cavitation erosion that limits their effectiveness.
- Experiments on Al alloy cylindrical ingots revealed that cavitation erosion occurs at specific points on the sonotrodes when activated, while unpowered ones showed no erosion.
- A finite element model was created to visualize the acoustic pressure dynamics during solidification, confirming that significant interactions leading to cavitation erosion happen only at certain positions, paving the way for improved sonotrodes designed for enhanced resistance.