| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Innovative Powder/Wire Processing of Multifunctional Materials
|
| Presentation Title |
Advanced Thermal Analysis to Study the Degree of Solid-State Thermoelastic Phase Transformation of Ti-rich Laser Directed Energy Deposition (LDED)-based NiTi Alloys |
| Author(s) |
Arnab Chatterjee, Reginald Felix Hamilton |
| On-Site Speaker (Planned) |
Arnab Chatterjee |
| Abstract Scope |
Shape Memory Alloys (SMAs) undergo a solid-state phase transformation under the application of stress or temperature. A criterion for optimal shape memory behavior is a reversible phase transformation, commonly referred to as thermoelastic. The variables that control the degree of thermoelasticity can be determined from analysis of Differential scanning calorimetry. We used metallic powders to fabricate three standard Titanium-rich LDED based AM builds that are differentiated by the orientation of their tool path with respect to the build direction. Here, we present an experimental and theoretical analysis to qualitatively and quantitatively investigate the extent to which LDED based Ti-rich NiTi SMAs exhibit thermoelastic transformations. This work establishes a framework and an approach to characterize the degree of underlying phase reversibility of SMAs and evaluate the contributing energetics. This understanding has been used to determine the build plan that shows optimal thermoelastic reversibility. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Phase Transformations, Modeling and Simulation |