What is it about?
Superelastic behavior at nano-scale has been studied along cycling in Cu-Al-Ni shape memory alloy micropillars. Arrays of square micropillars were produced by focused ion beam milling, on slides of [001] oriented Cu-Al-Ni single crystals. Superelastic behavior of micropillars, due to the stress-induced martensitic transformation, has been studied by nano-compression tests during thousand cycles, and its evolution has been followed along cycling. Each pillar has undergone more than thousand cycles without any detrimental evolution. Moreover we demonstrate that after thousand cycles they exhibit a perfectly reproducible and completely recoverable superelastic behavior.
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Why is it important?
This is the first time that superelasticity at nano scale is reported for thousand of cycles.
Perspectives
This paper open the door for superelastic devices working as actuators at micro-nano scale.
Professor Jose M. San Juan
Universidad del Pais Vasco
Read the Original
This page is a summary of: Long-term superelastic cycling at nano-scale in Cu-Al-Ni shape memory alloy micropillars, Applied Physics Letters, January 2014, American Institute of Physics,
DOI: 10.1063/1.4860951.
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