| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Applications of Solidification Fundamentals
|
| Presentation Title |
The Effects of Non-equilibrium Interfaces and Partial Solute Drag on Morphological Stability |
| Author(s) |
Christopher A. Hareland, Gildas Guillemot, Charles-André Gandin, Peter W. Voorhees |
| On-Site Speaker (Planned) |
Christopher A. Hareland |
| Abstract Scope |
The properties of additively manufactured (AM) components are controlled by the solidification structures that form during processing. The morphologies (i.e., planar or dendritic) and length scales for the growth of these structures can be estimated by examining the stability of a planar solid-liquid interface. Due to the large interfacial velocities, AM processes can lead to significant deviations from local equilibrium at the solid-liquid interface, and novel phenomena such as oscillatory instabilities and banding have been previously observed. Herein, an interfacial stability analysis for a concentrated multicomponent alloy in a system with a planar interface that accounts for the effects of interfacial non-equilibrium, latent heat, and partial solute drag is discussed. The effects of interfacial non-equilibrium are described with a set of interfacial response functions developed for non-equilibrium phase transformations in concentrated multicomponent alloys. Comparisons with existing theories and applications of the results to multicomponent dendritic growth will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Phase Transformations, Thin Films and Interfaces |