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Dr. Mark Masters
Department of Physics
Indiana University – Purdue University Fort Wayne
Four commercial grades of Nitinol wire were tested in a uniaxial test rig at slow and fast cyclic actuation rates in order to understand strain evolution during near-isobaric conditions. A thin wire diameter of 0.010” was selected in order to enable enhanced heat transfer and thus response time during high thermal testing. Strain evolution is compared through 100 actuation cycles in equiatomic NiTinol, Ni-Ti-Cr, and Ni-Ti-Co. We observe improvement in cyclic actuation stability with diminishing grain size, strengthening precipitate dispersions, and ternary alloy additions. Future work will be discussed towards informing processing conditions for high and stable work output in wire-based low and medium temperature applications.
Physical Sciences and Mathematics | Physics
Lockwood, Chase, "High Rate Testing of NiTinol Actuator Wire" (2015). 2015 IPFW Student Research and Creative Endeavor Symposium. 47.