ALUMINUM ALLOY WITH HIGH TOUGHNESS AND HIGH HEAT RESISTANCE, AND ITS MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy, capable of industrial production and combining toughness higher than heretofore with heat resistance also higher than heretofore, and its manufacture. SOLUTION: The metallic structure, after heating treatment for an aluminum (Al)-base supersaturated solid solution in which a transition metal element and a rare earth element are allowed to enter into solid solution, is a modulated structure in which an intermetallic compound 1 is precipitated into network state in a matrix composed of aluminum(Al) 2. The intermetallic compound 1 precipitated in the aluminum(Al) matrix is in a network state of 10 to 500 nm width (δ), and the spacing (λ) between nets of the network is regulated to 10 to 100 nm.