Compressive response of a single crystalline CoNiAl shape memory alloy
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The effects of crystallographic orientation and temperature on pseudoelasticity and recoverable strain levels under constant stress are revealed for the Co-31at.%Ni-27at.%Al alloy single crystals under compression. The single crystals demonstrate a perfect pseudoelasticity at temperatures as high as 170 C, recoverable transformation strains of 4% along the  orientation and 2.5% along the  orientation, small stress hysteresis (<40 MPa) and high strength level against dislocation formation. 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.