Fabrication of Electrodeposited Permalloys with High Strength and High Ductility

Abstract

The best electrodeposition conditions for fabricating artifact–free and ductile bulk nanocrystalline (nc) Ni–Fe alloys were investigated by evaluating the orientation indices of thin–film samples. Bulk nc Ni–Fe alloys electrodeposited under optimum conditions exhibited a high ultimate tensile strength of 1.9 GPa and a high tensile ductility of 9.1–12.2%. These alloys also showed a high Fe content of 25–29 mass%, achieving a permalloy composition. This study suggests that we succeeded in overcoming the trade–off between Fe content and elongations observed for previous electrodeposited Ni–Fe alloys.