June 28, 2015 to July 2, 2015
JW Marriott Starr Pass Resort
Etc/GMT-7 timezone

Apparatus and method for low-temperature training of shape memory alloys

Jun 29, 2015, 11:45 AM
Tucson Ballroom CD

Tucson Ballroom CD

Contributed Oral Presentation ICMC-14 - Cryogenic Materials Testing and Methods M1OrB - Cryogenic Materials I: Testing and Methods


Adam Swanger (NASA Kennedy Space Center)


An apparatus and method for the low-temperature mechanical training of shape memory alloys has been developed. The shape memory alloy (SMA) materials are prototypes being developed for novel thermal management systems in future cryogenic applications. Alloys providing two-way actuation at cryogenic temperatures are the chief target. The mechanical training regime was focused on the controlled movement of rectangular strips, with S-bend configurations, at temperatures as low as 30 K. The custom holding fixture included temperature sensors and a low heat-leak linear actuator with a magnetic coupling. The fixture was mounted to a Gifford-McMahon cryocooler providing up to 35 W of cooling power at 20 K and housed within a custom vacuum chamber. Operations included both training cycles and verification of shape memory movement. The system design and operation are discussed. Results of the training for select prototype alloys are presented.

Primary author

Adam Swanger (NASA Kennedy Space Center)


James Fesmire (NASA) Martha Williams (NASA Kennedy Space Center) Steven Trigwell (Sierra Lobo ESC) Tracy Gibson (Vencore ESC)

Presentation materials