| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Solid-State Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Phase Transformation Modeling of Functionally Graded Materials Made by Direct Energy Deposition |
| Author(s) |
Noah A. Sargent, Wei Xiong, Richard Otis |
| On-Site Speaker (Planned) |
Noah A. Sargent |
| Abstract Scope |
Directed Energy Deposition is a powder-based additive manufacturing technique with the advantage of fabricating Functionally Graded Materials (FGMs) through a dynamic variation of composition in consecutive layers along the building direction. FGMs have gained attention for their potential to enhance the performance of components that require a combination of material properties not available in traditional monolithic alloys. Despite the promise of incorporating multifunctional material properties, precipitation of brittle intermetallic phases and microsegregation often lead to undesirable properties. This work aims to address these issues by using the CALPHAD-based ICME (CALPHAD: CALculation of PHAse Diagrams, ICME: Integrated Computational Materials Engineering) method to model solidification, solid-state phase transformations, microsegregation, stacking fault energy, and Martensite start temperature in an FGM from Stainless Steel 316 to High Strength Low Alloy steel. Model-predictions will be compared with experimental results to assess the accuracy of the model developed in this work. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
ICME, Additive Manufacturing, Phase Transformations |