Aluminium alloy for producing ultrafine-grained powder having improved mechanical and microstructural properties

摘要

Aluminium alloys for producing ultrafine-grained powder having improved mechanical and microstructural properties are based on the systems Al/Cu, Al/Ni, Al/Cu/Mg or Al/Fe with additions of Fe, Co, Ni, Y, Ce, Mo, Cu, Cs, Rb, Sr, Zr, Ti or B, which form phases - in particular intermetallic compounds - which, due to a very high cooling rate (order of magnitude 106 DEG C/second) are used for precipitation hardening and/or dispersion hardening of the matrix. Using powders of a particle diameter of 20 mu m on average, Vickers hardnesses of 185 ... 260 ... 360 units are achieved, depending on the alloy.