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The influence of Cu substitution for Mn on martensitic transformation, superelasticity and associated elastocaloric effect in Ni44Mn45−xSn11Cux (x=0–4) magnetic shape memory alloys has been investigated. The transformation temperatures were tuned around room temperature by increasing the Cu content. Ni44Mn41Sn11Cu4 exhibits a giant adiabatic cooling of −8K at a small transformation strain of 1.3%,...
Elastocaloric effect for a Co50Ni20Ga30 single crystal has been investigated. A local adiabatic temperature change (ΔT) of −6K was observed on the removal of a uniaxial stress of 150MPa at 291K. Infrared thermography measurement reveal a correlated response of martensitic bands and temperature mapping. Both elastocaloric effect and superelasticity exhibit a good reversibility in the 100 times of cycling...
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