About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
Augmenting Standard Thermal Analysis to Evaluate Thermoelastic Reversibility in Additively Manufactured Ti-Rich Classes of NiTi Shape Memory Alloys |
| Author(s) |
Foster Korsi Feni, Blake Miller, Reginald F. Hamilton |
| On-Site Speaker (Planned) |
Foster Korsi Feni |
| Abstract Scope |
Fundamental thermal analysis is crucial for designing shape memory alloys for advanced manufacturing technologies. Transformation temperatures are key design parameters for determining operational temperature requirements. However, widespread application is hindered by functional fatigue and unpredictable structure-property relationships. Research and development efforts primarily focus on Shape Memory Effect (SME) and Superelasticity (SE) behaviors. This study introduces a novel thermal analysis approach using Differential Scanning Calorimetry (DSC) to characterize thermoelastic reversibility in thermal-induced martensitic transformation. The approach defines "thermoelastic character" as the equivalence of forward (austenite → martensite) and reverse transformation pathways, presenting it as a metric for correlating structure with SE and SME properties. The study is performed on a Ti-rich NiTi alloy fabricated using laser-directed energy deposition, assessing thermoelastic character through the equivalency of transformation peaks, latent heat, and transformation interval. The aim is to expand DSC-based analysis beyond transformation temperatures to inform SMA design strategies against functional fatigue. |