Ultrasonic magnetic abrasive finishing of Al7075-T6 and A356.0-T6 using SiC-brush with CNT nano-lubricant
Yu Xiang, Cao Fenghong
Abstract
The efficiency of Magnetic Abrasive Finishing (MAF) relies on magnetic fields, abrasive particles, their motion, and the surface being processed. This study integrates ultrasonic vibrations with MAF using nano-sized abrasives (UAMAF) to achieve nanometer-scale surface finishing. A custom setup was developed for finishing tubular components using ultrasonic vibration-assisted MAF. The research investigated the impact of ultrasonic vibrations, finishing duration, and carbon nanotube (CNT) addition on the surface roughness of Al7075-T6 and A356.0-T6 alloy tubes. Results showed that ultrasonic vibrations significantly reduced surface roughness. Adding 0.6 wt% CNTs increased surface roughness variations by 7% and 10% for MAF and UAMAF, respectively. The higher material removal rate (MRR) observed in Al-7075-T6 indicates that UAMAF is more effective on harder materials. Optical microscopy confirmed a three-body abrasion mechanism.