| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
|
| Presentation Title |
Thermal Analysis for Characterizing Effects of Metallurgical Conditions in LDED Fabricated Ti-rich NiTi Shape Memory Alloys |
| Author(s) |
Foster Korsi Feni, Blake Miller, Reginald Hamilton |
| On-Site Speaker (Planned) |
Foster Korsi Feni |
| Abstract Scope |
Shape memory alloys undergo a diffusionless solid-to-solid state transformation to exhibit shape memory effect and superelasticity. Composition and microstructure highly influence these functional properties. Additive manufacturing is a burgeoning process that can control the microstructure and hence, the functional behavior of SMAs. Work has been reported on characterizing the shape memory properties of Ni-rich NiTi alloys fabricated by AM. However, little has been done for Ti-rich alloys. In addition, the complex thermal history and microstructure of parts manufactured from AM processes are expected to cause spatial variation in properties. This study used LDED to fabricate Ti-rich NiTi coupons with varying build sizes and orientations, thus, different thermal signatures. Differential scanning calorimetry (DSC) was employed to spatially characterize the transformation temperatures of specimens sectioned at different locations within builds. DSC results were also augmented to provide advanced metrics for insight into the thermoelastic nature of deposited parts. |