FORMATION AND MECHANICAL STRENGTHS OF ALUMINUM-BASED SUPERSATURATED SOLID-SOLUTIONS

This paper deals with the recent data on the formation ranges, microstructure and mechanical properties of nonequilibrium supersaturated solid solution including fcc and amorphous phases in Al-Ln-TM (Ln = lanthanide metal, TM = transition metal) ternary system produced by rapid solidification. The tensile fracture strength (sigma-f) increases with increasing solute elements and the highest sigma-f is about 860 MPa for the fcc supersaturated solution and 1280 MPa for the amorphous phase. The compositional dependence of sigma-f for both phases is dominated by the bonding nature among the constituent elements and independent of their atomic size ratios and atomic arrangements.