About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing of Metals: Applications of Solidification Fundamentals
|
Presentation Title |
Probing Surface Structures in Metal Powders Produced by Abrasion and Rapid Solidification |
Author(s) |
Harish Singh Singh Dhami, Puli Saikiran, Koushik Viswanathan |
On-Site Speaker (Planned) |
Harish Singh Singh Dhami |
Abstract Scope |
Metal powder particles show a range of interesting surface structures that are quite reminiscent of those seen in conventional casting. Given their central importance for manufacturing processes such as metal 3D printing and powder metallurgy, understanding their evolution during rapid solidification has remained an area of active interest. This work attempts to understand the dynamic evolution of surface morphologies on spherical metal particles produced via an abrasion process. In order to surmount the technical challenges posed by high cooling rates (10^5 K/s) and very small time/length scales, we use a controllable low-melting organic substitute to mimic the process. Containerless solidification conditions were set up using acoustic levitation techniques and controlled thermal environment, to study the solidification dynamics of a single levitated drop using in situ imaging and tracking techniques. Complementary analytical and numerical calculations are also presented in the context of transitions between different surface morphologies. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Powder Materials, Solidification |