|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||I-10: Modification of Intermetallic Compounds in Aluminum Alloys by Using Ultrasonic Vibrations
||Tomohiro Ishii, Sergey Komarov
|On-Site Speaker (Planned)
Although effects of ultrasonic vibrations on aluminum alloy structure have been the subject of many studies, there is still conflicting data regarding influence of ultrasonic on intermetallic compounds. The available literature reveals that ultrasonic can cause both their refinement and coarsening. This study examines combined effects of ultrasonic cavitation, acoustic streaming and temperature on behaviour of various intermetallic compounds. In experiments, 1 kg of aluminum alloy was melted, and then ultrasonic vibrations were introduced into the melt within a certain temperature range for fixed time. Then, the melt was poured into various moulds to provide well-controlled cooling and solidifying conditions. Intermetallic compounds were characterized for their chemical composition, morphology, size and mechanical properties. Water model experiments and numerical simulation were performed to elucidate the behaviour of intermetallic compounds in the melt. The ultrasonic effects are discussed with emphasis on heat and mass transfer during nucleation and growth of intermetallic compounds.
||Planned: Light Metals