Superelastic response of the FeNiCoAlTi single crystals under tension and compression
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© 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. The superelastic response of the Fe43.5Ni28Co17Al11.5Ti2.5 single crystalline shape memory alloy was investigated along the [1 0 0] orientation in both tension and compression. A fully recoverable superelastic loop was observed under both tension and compression within the temperature range of -80 to 0 °C. At higher temperatures, while up to 6% superelastic strain was attainable in tension, the superelasticity deteriorates quickly under compressive strains exceeding 2%. The asymmetric response is likely caused by different numbers of stress-activated martensite variants in tension and compression.
author list (cited authors)
Tseng, L. W., Ma, J. i., Karaman, I., Wang, S. J., & Chumlyakov, Y. I.