Fine crystallite high-function metal alloy member and method for manufacturing same

A fine crystallite high-function metal alloy member, wherein a metal alloy including a high-purity metal alloy whose crystal lattice is a face-centered cubic lattice, a body-centered cubic lattice, or a close-packed hexagonal lattice is made to contain therein 5 to 30000 ppm of gadolinium (Gd), and the crystallite thereof is made fine with the size in the level of nanometers (10−9 m to 10−6 m) and micrometers (10−6 m to 10−3 m).

A method for producing a fine crystallite high-function metal alloy member, wherein the method comprises:

• adding 5 to 30000 ppm of gadolinium (Gd) to a metal alloy including a high-purity metal alloy whose crystal lattice is a face-centered cubic lattice, a body-centered cubic lattice, or a close-packed hexagonal lattice;
• and
• cast-molding an obtained material to make a crystallite thereof fine with the size in the level of nanometers (10−9 m to 10−6 m) and micrometers (10−6 m to 10−3 m).