Method for preparing NiAl shape memory alloy film by cold rolling ultra-thin laminated alloy foil

Abstract

This invention discloses a method of preparing NiAl shape memory alloy thin film through cold rolling ultrathin lamination alloying. Good plasticity, easy deformed Al foil, Ni foils are materials, and foil thickness is defined according to atom constitution formula Ni1-XAlX. Metal foils are alternating laid, sandwich structure is got after big deformation cold rolling, it is repeated again and again, and finally components uniform alloy film is got after diffusion annealing alloying. The reactant ratio is 0.30íœxíœ0.40. The film components made by this method is easy control, crystal grain is small, fatigue life is high, area is large and cost is low.

Description

technical field

[0001] The invention relates to the field of shape-memory alloys, in particular to a method for preparing NiAl shape-memory alloy films by cold-rolling ultra-thin lamination alloying. The thin film prepared by the method has the advantages of simple production process, easy control of components and good mechanical properties. technical background

[0002] Most of the shape memory alloys used today are affected by their thermoelastic martensitic phase transition temperature, and their working temperatures are mostly lower than 100°C. There is particular interest and demand for high temperature shape memory alloys with higher phase transition temperatures. Therefore, the research and development of high-temperature shape memory alloys has considerable engineering application prospects, and will definitely help to upgrade automation and self-adaptive capabilities in the field of engineering technology in the next century.

[0003] At present, the high-tempera...

Images