About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
Passively Deployable Shape Memory Alloy Heat Pipes for Small Satellite Thermal Management |
| Author(s) |
Mique Gonzales, Damian Williams, Foster Feni, Alexander Rattner, Reginald Hamilton |
| On-Site Speaker (Planned) |
Mique Gonzales |
| Abstract Scope |
Shape Memory Alloys (SMAs) are multifunctional adaptive material systems which are promising for passively-deployable, thermal-management solutions on small satellites. SMAs exhibit a shape memory effect (SME) response whereby heating induces mechanical recovery. Heat from thermal loads (carried by radiator working fluids) is transferred to SMA heat pipes which activates the thermal recovery multifunctionality of NiTi as passive, self-deploying radiators. In this work, Ti-rich feedstock compositions are employed for Powder Bed Fusion (PBF) Additive Manufacturing which meet operating temperature requirements. Digital image correlation is employed to probe varied length scales for characterizing multiscale reversibility of the evolving strain contours; reflective of “signatures” of the transformation. Bending experimentation is investigated to evaluate candidate materials for their suitability in the end application. Stress-strain and full-field key descriptors are defined and leveraged to assess performance which requires optimal shape memory behavior including recoverability and strain transformation over the material’s volume. |