porous superelastic NiTi shape memory alloy (SMA), fabricated by capsule-free hot isostatic
pressing, under cyclic compression strain; and a systematical comparison was made with
that of the dense NiTi SMA. The results show that the porous NiTi SMA has very good
deformation recovery ability, in terms of a linear superelasticity as high as 4%. Under a high-
cyclic strain level applied, the irrecoverable pore deformation occurs, which results in …