| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Light Metal and Composites Technology
|
| Presentation Title |
Functional Relationships between Treatment Time, Microstructure and Mechanical Properties of Ultrasonically Cast Metal Matrix Nanocomposites |
| Author(s) |
Tanaji Paul, Cheng Zhang, Benjamin Boesl, Arvind Agarwal |
| On-Site Speaker (Planned) |
Tanaji Paul |
| Abstract Scope |
Establishment of a quantitative understanding of the effect of ultrasonic treatment variables is essential for the development of process maps for metal matrix composite manufacturing. This paper presents novel mathematical correlations to predict grain refinement and hardening in SiC nanoparticle reinforced Al matrix composites as a function of ultrasonic treatment time. Excellent grain refinement efficiency of 62.8% was achieved by ultrasonication for 90s. This was due to an increase in number of heterogeneous nucleation sites from the synergistic effect of ultrasonic treatment induced microbubbles and SiC deagglomeration. The resulting volumetric nucleation density manifests slow exponential increase with ultrasonication time. Relationships of hardening with time were established by separating grain refinement and SiC dispersion contributions towards hardness. Ultrasonication induced SiC dispersion decreased the interparticle distance with resultant exponential hardening with time. These functional relationships constitute a major advancement towards metal matrix composite manufacturing technology. |