|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Applications of Solidification Fundamentals
||Microstructure Characteristics of A356 Nanocomposites Manufactured via Ultrasonic Cavitation Processing under Controlled Solidification Conditions
||Yang Xuan, Laurentiu Nastac
|On-Site Speaker (Planned)
Adding nanoparticles into aluminum alloy can fabricate nanocomposites with good mechanical properties. Recent studies performed at the Solidification Laboratory, The University of Alabama, showed that the use of ultrasonic cavitation during solidification can significantly refine the microstructure of A356 anocomposites. This is because during the fabrication of nanocomposite castings, ultrasonic cavitation processing can produce strong convection and shock waves, which promote both the dendrite fragmentation and the increase of the nuclei in the melt. In the present work, the relationship between the nanocomposite microstructure and the cooling rate during solidification has been studied in detail. A356 alloy and Al<SUB>2</SUB>O<SUB>3</SUB> /SiC nanoparticles were used as the matrix alloy and the reinforcements, respectively. Ultrasonic cavitation was applied during the solidification process. Two-zone induction furnace was applied to control the temperature gradients during solidification at a desired value. The microstructure of the cast nanocomposites has been investigated in detail by OM and SEM-EDS.
||Planned: Supplemental Proceedings volume