| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Functional and Energy Materials
|
| Presentation Title |
Selective Laser Melting of Co-Ni-Ga Shape Memory Alloys |
| Author(s) |
Philipp Krooss, Christian Lauhoff, Julia Richter, Florian Brenne, Thomas Niendorf |
| On-Site Speaker (Planned) |
Philipp Krooss |
| Abstract Scope |
Shape memory alloys (SMAs) are known for their their unique material properties. However, binary Ni Ti SMAs suffer from limited application temperature range. To overcome current limitations, high temperature SMAs, i.e. Ni-Ti-X (X= Zr, Hf), Ti-Ta-Al and Co-Ni-Ga, have been introduced.
Co-Ni-Ga polycrystals suffer from intergranular constraints. Thus, crystallographic orientation and grain boundary engineering play an important role in terms of functional reversibility. Whereas grain boundary triple junctions promote functional degradation, bamboo-like microstructures result in excellent reversibility. Additive manufacturing allows for direct microstructure design, i.e. realization of globular and columnar-grained structures as well as distinct crystallographic texture.
The present study focuses on selective laser melting of Co-Ni-Ga and compares differently processed microstructures. Detailed microstructure analysis using in-situ techniques and electron microscopy was conducted allowing for correlations between the phase transformation characteristics and microstructural features. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |