초록 ▼

The invention offers an aluminum alloy that not only has high hardness accompanied by balanced ductility but also has high toughness and superior processability. The invention also offers a method for manufacturing an aluminum-alloy member that not only has high hardness accompanied by balanced duct

The invention offers an aluminum alloy that not only has high hardness accompanied by balanced ductility but also has high toughness and superior processability. The invention also offers a method for manufacturing an aluminum-alloy member that not only has high hardness accompanied by balanced ductility but also has high toughness and superior processability. The aluminum alloy comprises (1) not less than 0.1 wt. % and not more than 8 wt. % Constituent A comprising one or more kinds of elements selected from the group consisting of titanium, vanadium, hafnium, and zirconium, (2) not less than 0.1 wt. % and not more than 20 wt. % Constituent B comprising one or more kinds of elements selected from the group consisting of lanthanum, cerium, praseodymium, neodymium, mischmetal, calcium, strontium, and barium, and (3) not less than 0.1 wt. % and not more than 20 wt. % Constituent C comprising one or more kinds of elements selected from the group consisting of magnesium and lithium.

대표청구항 ▼

1. An aluminum alloy comprising:(1) not less than 1 wt. % and not more than 6 wt. % Constituent A comprising one or more elements selected from the group consisting of titanium, vanadium, hafnium, and zirconium, (2) not less than 3 wt. % and not more than 13.5 wt. % Constituent B comprising one or m

1. An aluminum alloy comprising:(1) not less than 1 wt. % and not more than 6 wt. % Constituent A comprising one or more elements selected from the group consisting of titanium, vanadium, hafnium, and zirconium, (2) not less than 3 wt. % and not more than 13.5 wt. % Constituent B comprising one or more elements selected from the group consisting of lanthanum, cerium, praseodymium, neodynium, mischmetal, calcium, strontium, and barioum, and (3) not less than 2 wt. % and not more than 18 wt. % Constituent C comprising one or more elements selected from the group consisting of magnesium and lithium, wherein: the aluminum alloy has been fabricated by initially forming a preform containing Constituents A, B and C, and heating the preform up to a temperature not lower than 200.degree. C. and not higher than 600.degree. C. at a temperature rising rate of not less than 2.degree. C./sec and not more than 200.degree. C./sec; the step of producing the preform includes a step of forming rapidly solidified powders of the aluminum alloy; the aluminum alloy contains aluminum crystals and intermetallic compounds, the aluminum crystals have an average grain diameter of 1,000 nm or less, and the intermetallic compound has an average grain diameter of 500 nm or less; and the aluminum alloy has a hardness HRB not less than 50 and not more than 100, a critical upsetting ratio of 70% or more at temperatures not lower than 200.degree. C. and an elongation of 10% or more at 20.degree. C.