Cryogenic Superelasticity and Concomitant Elastocaloric Effect

Elastocaloric effect in Cu - Zn

This work aims to study the elastocaloric effect in a Cu-Al-Zn shape memory alloy sample. The elastocaloric effect refers to the reversible thermal response (isothermal entropy change, or adiabatic temperature change) of a body when subjected to a uniaxial stress. To measure the entropy change of the martensitic transformation, differential scanning calorimetry technique has been used. The calo...

Magnetic superelasticity and inverse magnetocaloric effect in Ni-Mn-In

Applying a magnetic field to a ferromagnetic Ni50Mn34In16 alloy in the martensitic state induces a structural phase transition to the austenitic state. This is accompanied by a strain which recovers on removing the magnetic field, giving the system a magnetically superelastic character. A further property of this alloy is that it also shows the inverse magnetocaloric effect. The magnetic supere...

Shape memory effect and superelasticity in a strain glass alloy.

The shape memory effect and superelasticity are usually found in alloys exhibiting spontaneous martensitic transformation. Thus it is hard to imagine that such interesting effects can appear in a system without a martensitic transformation. In this Letter we show shape memory and the superelasticity effect in a nonmartensitic Ti48.5Ni51.5 alloy, which has no martensitic transformation but under...

Effect of Aging Treatment on Superelasticity of a Ti48.8Ni50.8V0.4 Alloy

Elastocaloric cooling potential of NiTi

24 Solid state elastocaloric cooling, the endothermic reversible martensitic phase transformation in shape 25 memory alloys, has the potential to replace vapor compression refrigeration. NiTi, Ni2FeGa, and CoNiAl 26 shape memory alloys were experimentally investigated to measure the magnitude of temperature 27 change using thermography during uniaxial tensile experiments. Consecutive tensile cy...