Reduction of Mechanical Anisotropy in Nitinol Thin Sheets

Nitinol sheets develop various crystallographic textures during the rolling process. The crystallographic texture results in orientation-dependent mechanical response variability, such as plateau stress, plateau strain and residual strain. These anisotropic mechanical responses may cause a non-uniformity of deformation in engineering components and increase a risk of structure failure and material damage, particularly for those products involving large crimping strain in medical device fabrication.