Patent ID: 6056835
Filing Date: 2000-05-02
Classification: C22C,C22F,Y10S

Abstract:
A superplastic aluminum alloy comprising from 4 to 15% by weight of Mg, from 0.1 to 1.0% by weight of one or more elements selected from the group consisting of misch metal, Zr, V, W, Ti, Nb, Ca, Co, Mo and Ta, and the balance being Al and unavoidable impurities, wherein the alloy (i) contains 0.1 to 4.0% by volume of dispersed spheroidal precipitates of intermetallic compounds having a particle size of 10 to 200 nm, and (ii) has a grain structure wherein the mean grain size is from 0.1 to 10 .mu.m, and from 10 to 50% of the grain boundaries have a misorientation of less than 15.degree..