Single crystal shape memory alloy devices and methods

摘要: Devices and methods of making devices having one or more components made single crystal shape memory alloy capable large recoverable distortions, defined herein as “hyperelastic” SMA. Recoverable Strains are 9 percent, in special circumstances 22 percent. Hyperelastic SMAs exhibit no creep gradual change during repeated cycling because there boundaries. properties inherent the formed: cold work heat treatment is necessary. Alloy Cu—Al—X where X may be Ni, Fe, Co, Mn. Single crystals pulled from melt Stepanov method quenched by rapid cooling to prevent selective precipitation individual elemental components. Conventional finishing used: milling, turning, electro-discharge machining, abrasion. Fields application include aerospace, military, automotive, medical devices, microelectronics, consumer products.