About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Characterization of Minerals, Metals and Materials
|
Presentation Title |
Understanding Wall Stresses in Powder Die Compaction by Novel Experiments and Coordinated Modeling |
Author(s) |
Daniel C. Bufford, Dan S. Bolintineanu, Joel T. Clemmer, William W. Erikson, Stewart A. Silling, Stwewart Youngblood |
On-Site Speaker (Planned) |
Daniel C. Bufford |
Abstract Scope |
Die compaction of powders finds use in various fields from powder metallurgy to pharmaceuticals. Stresses between the powder and die walls may fracture the powder compact or damage the die itself. An incomplete understanding of the structure-property relationships that govern interactions among particles and the die means that many compaction processes are developed empirically through trial-and-error. Here we discuss efforts to understand and predict powder compaction behavior starting from properties of powder materials including metals, organics, and salts. We experimentally resolve stress profiles between the powder and die along the length of the compact in real time during compaction, through loading, constant load hold, unloading, and post-unload relaxation steps. Coordinated particle-scale modeling enables a better understanding of particle interactions that give rise to these stress transmission behaviors. This approach provides steps towards an ability to predict the results of die compaction based on material properties rather than empirical testing. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Mechanical Properties, Powder Materials |