|About this Abstract
||MS&T23: Materials Science & Technology
||Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
||Ultrasonic Vibration Acoustic Softening Effect on AISI 1018 Low-Carbon Steel
||Thomas Kang, Xun Liu
|On-Site Speaker (Planned)
Ultrasonic vibration during plastic deformation reduces the flow stress of the material due to the acoustic softening effect. The drop in flow stress has been used to improve metal forming processes such as wire drawing, incremental sheet forming, and friction stir welding, however, the underlying physical principals are still not well understood. Acoustic softening is explained by the enhanced movement of dislocations and increased dislocation annihilation in literature. Studies have been conducted on various metals and yielded different results based on material systems, relative direction of deformation and ultrasonic vibration, as well as ultrasonic amplitude/frequency. In our study, the ultrasonic vibrations are applied parallel to the tensile axis on micro-dogbone samples to ensure uniform ultrasonic amplitude throughout the sample. Dependance of acoustic softening with varying ultrasonic vibration parameters are studied on AISI 1018 low-carbon steel.