About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
A CALPHAD Model of Dendritic Growth for the Design of Printable Industrial Alloys |
Author(s) |
Christopher A. Hareland, Peter W. Voorhees |
On-Site Speaker (Planned) |
Christopher A. Hareland |
Abstract Scope |
The properties of components made via additive manufacturing (AM) are largely controlled by the microstructures that form during solidification. The morphologies (i.e., planar or dendritic) of these structures can be estimated using a model for the so-called “columnar-to-equiaxed transition” (CET), in which columnar grains growing epitaxially from the substrate are overgrown by equiaxed grains nucleating in the melt pool. The large interfacial velocities observed during AM processes can lead to significant deviations from local equilibrium at the solid-liquid interface, so models including non-equilibrium kinetic effects are required. Herein, we use a CALPHAD-coupled model of non-equilibrium dendritic growth, which provides a full treatment of both the multicomponent thermodynamics and rapid solidification kinetics in concentrated multicomponent alloys, in a model for the CET to construct “microstructure selection maps” for the AM of industrial alloys. Comparisons with existing theories and applications to the design of various industrial alloys for AM will be discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, ICME, Solidification |