Abstract:
A process for preparing an aluminum alloy which can be produced on a commercial scale and has higher strength and toughness than the conventional aluminum alloys. The alloy comprises an alpha -aluminum phase comprising grains having an average diameter of 60 to 1000 nm and a phase of two or more intermetallic compounds comprising grains having an average diameter of 20 to 2000 nm, and the grains of the intermetallic compound are dispersed so that the connection between the intermetallic compound grains is intermittent.
Abstract:
An aluminum-alloy, which is wear-resistant and does not wear greatly the opposed cast iron or steel, and which can be warm worked, is provided by the following composition and structure. Composition: AlaSibMcXdTe (M is at least one element selected from the group consisting of Fe, Co and Ni; X is at least one element selected from the group consisting of Y, Ce, La and Mm (misch metal); Y is at least one element selected from the group consisting of Mn, Cr, V, Ti, Mo, Zr, W, Ta and Hf; a=50 - 85 atomic %, b=10 - 49 atomic %, c=0.5 - 10 atomic %, d=0.5 - 10 atomic %, e=0 - 10 atomic %, and a+b+c+d+e=100 atomic %).Structure: super-saturated face-centered cubic crystals and fine Si precipitates.
Abstract:
A high-strength rolled sheet of an aluminum alloy having a composition represented by the general formula Al ba iNi a X b , Al bai Ni a X b M c or Alb a iNi a X b M c Q d wherein X represents at least one element selected from among La, Ce, Mm, Ti and Zr; M represents at least one element selected from among V, Cr, Mn, Fe, Co, Y, Nb, Mo, Hf, Ta and W; Q represents at least one element selected from among Mg, Si, Cu and Zn; and a, b, c and d are, in atomic percentages, 2 ≦ a 10, 0.1 ≦ b 3, 0.1 ≦ c 2 2 and 0.01 ≦ d 2, wherein intermetallic compounds crystallized therefrom have a maximum particle size of 10 µm or less. The rolled sheet can be easily produced by subjecting a melt of an alloy having the above-described composition to rolling simultaneously with cooling and solidification to provide a rolled sheet and has high strength and rigidity and excellent heat resistance and ductility.