| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Functional and Energy Materials
|
| Presentation Title |
Microstructure-property Correlations of LENS Processed NiTi |
| Author(s) |
Sujith Kumar S, Lakhindra Marandi, Mitun Das, Indrani Sen |
| On-Site Speaker (Planned) |
Indrani Sen |
| Abstract Scope |
NiTi based alloys having pseudo-elastic properties are popular candidates for different niche applications such as cardio-vascular stents and sensors. Additive manufacturing is a state-of-the-art technique to produce such complex shapes. Mechanical behavior including pseudo-elasticity of NiTi alloy, prepared by laser engineered net shaping (LENS) is investigated thoroughly in the present research. Laser energy densities of the manufacturing method are modified. Corresponding effects on microstructure and phase evolution of the NiTi are evaluated systematically. Subsequently, mechanical properties are assessed by implementing macro-, micro- and nano-indentations with load levels varying over five orders of magnitude and indenter tip geometry varying from sharp-Berkovich to blunt-spherical. Increasing laser energy density of manufacturing is noted to affect the phase evolution leading to improved hardness but reduced pseudo-elasticity. The study provides a scope to optimize the parameters of LENS to manufacture NiTi with the best combination of microstructure, porosity, phase stability as well as pseudoelasticity. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |