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Orientation Dependent Compression Behavior Of Co35Ni35Al30 Single Crystals, Peizhen Li, Haluk E. Karaca, Yury I. Chumlyakov

Mechanical Engineering Faculty Publications

The shape memory effect (SME) and superelasticity (SE) behavior of homogenized Co₃₅Ni₃₅Al₃₀ single crystals were systematically characterized along the [100], [110] and [111] orientations under compression. The shape memory behavior of CoNiAl was found to be highly orientation and stress/temperature dependent. Maximum compressive recoverable strains were 3.98 % in [110], 3 % in [100] and 0.30 % in [111] orientations, respectively. The Co₃₅Ni₃₅Al₃₀ demonstrated a very high superelastic temperature window of more than 350 °C along the [100] and [110] orientations. Moreover, two-way shape memory effect with very low thermal …