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 [100] orientation and 2.5% along the ...

Molecular dynamics simulations are performed to study the atomistic mechanisms governing the pseudoelasticity and shape memory in nickel–titanium (NiTi) nanostructures. For a h110i – oriented nanopillar subjected to compressive loading–unloading, we observe either a pseudoelastic or shape memory response, depending on the applied strain and temperature that control the reversibility of phase tr...

This study evaluated the influence of heat treatment and thermomechanical training on microstructural evolution mechanical characteristics conventional additive-manufactured FeMnSi-based shape memory alloys. The samples were produced by casting rolling. manufactured using laser powder bed fusion (L-PBF) technique. Both specimens subjected to same training. involved solution annealing at 1050 °C...

We present for the first time pseudoelasticity and shape memory results on Co–Ni–Al single crystals in tension. The experimental transformation strains approached 6% in tension in the [115] orientation. Despite the considerable volume change (0.0447), the transformation exhibits remarkable pseudoelasticity and shape memory recoverability in tension. A theoretical treatment is presented to expla...

In order to describe the deformation properties due to the martensitic transformation and the R-phase transformation of TiNi shape memory alloy, a thermomechanical constitutive equation considering the volume fractions of induced phases associated with both transformations is developed. The proposed constitutive equation expresses well the properties of the shape memory effect, pseudoelasticity...

In the current study, a broad experimental program was designed and conducted to investigate effect of aging conditions (i.e., temperature time) on thermomechanical properties (0.1% yield stress, pseudoelasticity, recovery stress) an FeMnSi-based shape memory alloy (FeMnSi-SMA) with chemical composition Fe–17Mn–5Si–10Cr–4Ni-1(V, C) (wt.%). addition, transmission electron microscopy (TEM) used s...