The objective of this joint activity between Kennedy Space Center (KSC) and Glenn Research Center (GRC) is to develop and evaluate the applicability of 2-way SMAs in proof-of-concept, low-temperature adaptive autonomous systems. As part of this low technology readiness (TRL) activity, we will develop and train low-temperature novel, 2-way shape memory alloys (SMAs) with actuation temperatures ranging from 0°C to -150 °C. These experimental alloys will also be preliminary tested to evaluate their performance parameters and transformation (actuation) temperatures in low- temperature or cryogenic adaptive proof-of-concept systems. The challenge will be in the development, design, and training of the alloys for 2-way actuation at those temperatures.
The feasibility of using SMAs to provide switchable thermal systems has been previously demonstrated by taking advantage of the 1- or 2-way actuation properties of SMAs, allowing a system to switch between a thermally insulative to a conductive state by actuation of the SMA at a preset temperature. However, the alloys designed or commercially available and tested to date had actuation temperatures above room temperature (65–95 °C). Technology needs still exists for autonomous actuation at cryogenic temperatures. The GRC portion of the research work is being leveraged to address such technology gaps in low-temperature SMA compositions and covers a broad chemistry of binary, ternary and quaternary alloys with temperature-induced actuation capabilities below 0 °C. Experimental alloys with elemental constituents encompassing Fe, Co, Cr, Hf, Cu and Zr added to the base NiTi alloy are explored and downselected. The new alloys are cryogenic trained for 2-way actuation for potential utilization in novel designs developed by KSC.More »
Significant benefit will be gained in expanding the knowledge base and novel innovation at multiple NASA centers in low-temperature SMA technologies. KSC's efforts focus on SMA Adaptive Materials Systems Concepts and Designs and GRC's efforts focus on Novel Low-temperature Alloy Designs. 2-way cryogenic temperature SMAs open new areas of applications in space and commercial aerospace (e.g. adaptive umbilical connectors (thermal and mechanical) which use surrounding environments to add multi-functionality). It is expected systems like this would allow for more robust operations in cryogenic storage and transfer systems and in-situ resource utilization for space exploration. It is expected technology success could result in game changing results for use of low temperature SMAs in adaptive, smart thermal/mechanical systems.
Aligns with the following NASA Strategic Initiatives:
-Strategic Space Technology Investment Plan (SSTIP) Strategic Goal 3: technology investment framework under core technology investment and adjacent technologies, light weight structures and autonomous control, and surface systems.
- NASA Roadmap technologies areas (TA) alignment TA184.108.40.206 Environment; TA220.127.116.11 Lightweight Concepts, Shape Morphing Materials; TA18.104.22.168 Innovative, Multi-functional Concepts, Adaptive/smart Structures; TA14.2.1 Cryogenic Systems; TA22.214.171.124 In-Space Propulsion, Liquid Cryogenic; TA2:2.4.2 Propellant Storage & Transfer; and TA13:1.1 Distribution, Storage and Conservation of Fluids.
-NASA Space Technology Grand Challenges – Space Colonization
Development of this technology also aligns with the Office of Science and Technology Policy (OSTP) focus area: Development of New Foundational Technologies to Reduce Future Costs Across NASA, Expand Opportunities, and Grow the American Economy.
Advancing development and NASA intellectual property in the area of multifunctional materials for cryogenic thermal control, autonomous systems, and technologies for umbilical and surface systems can result in technology transfer and benefits to the commercial space industry.More »
|Organizations Performing Work||Role||Type||Location|
|Kennedy Space Center (KSC)||Lead Organization||NASA Center||Kennedy Space Center, FL|
|The University of Florida||Academic|
|University of Central Florida||Academic||Orlando, FL|
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