Patent ID: 6149737
Filing Date: 2000-11-21
Classification: C22C

Abstract:
A high-strength high-toughness aluminum alloy comprising a first phase of .alpha.-aluminum crystal grains having a mean crystal grain size within the range of 60 to 1000 nm and a second phase comprising first and second intermetallic compounds that respectively have respectively different compositions, wherein said first intermetallic compound consists of first crystal grains having crystal grain sizes in a range from 20 to 900 nm, said second intermetallic compound consists of second crystal grains having crystal grain sizes in a range from 400 to 2000 nm, said first crystal grains are present in interiors of said .alpha.-aluminum crystal grains, said second crystal grains are distributed along a crystal grain boundary of said .alpha.-aluminum crystal grains, and said first and second crystal grains of said intermetallic compounds are dispersed relative to each other so as to establish a non-continuous intermittent linkage between said crystal grains of said intermetallic compounds.