Abstract: A method of casting an article includes forming a melt comprising copper, introducing manganese into the melt to produce a copper-manganese alloy, and casting the copper-manganese alloy in a mold to form the article. The carbon and oxygen contents of the copper-manganese alloy are controlled in order to control the formation of graphite, manganese carbide, and/or manganese oxide particles within the article. Copper-manganese alloys containing carbon are also provided, as well as articles made therefrom in cast or wrought form.

Abstract: A method of casting an article includes forming a melt comprising copper, introducing manganese into the melt to produce a copper-manganese alloy, and casting the copper-manganese alloy in a mold to form the article. The carbon and oxygen contents of the copper-manganese alloy are controlled in order to control the formation of graphite, manganese carbide, and/or manganese oxide particles within the article. Copper-manganese alloys containing carbon are also provided, as well as articles made therefrom in cast or wrought form.

Abstract: A method of casting an article includes forming a melt comprising copper, introducing manganese into the melt to produce a copper-manganese alloy, and casting the copper-manganese alloy in a mold to form the article. The carbon and oxygen contents of the copper-manganese alloy are controlled in order to control the formation of graphite, manganese carbide, and/or manganese oxide particles within the article. Copper-manganese alloys containing carbon are also provided, as well as articles made therefrom in cast or wrought form.

Abstract: A method of casting an article includes forming a melt comprising copper, introducing manganese into the melt to produce a copper-manganese alloy, and casting the copper-manganese alloy in a mold to form the article. The carbon and oxygen contents of the copper-manganese alloy are controlled in order to control the formation of graphite, manganese carbide, and/or manganese oxide particles within the article. Copper-manganese alloys containing carbon are also provided, as well as articles made therefrom in cast or wrought form.

Abstract: A ternary alloy wherein copper, manganese, and a ternary element are melted together and cast into an article and the article is subjected to an age-hardening treatment. A process for producing an age-hardened copper-manganese-nickel alloy, the process including melting a composition comprising copper, manganese and nickel; pouring the molten composition comprising copper, manganese, and nickel to form a casting with a composition comprising copper, manganese, and nickel, and aging the casting so produced. An article containing copper, manganese, and a ternary element, in a cast form and the cast form has subsequently undergone age-hardening treatment. A ternary alloy comprising copper, manganese, and a ternary element melted together and solidified into a casting, wherein the microstructure of the casting produced shows substantially low microporosity attributable to dendritic solidification.