METHODS AND PROCESS TO IMPROVE THE MECHANICAL PROPERTIES OF CAST ALUMINIUM ALLOYS AT AMBIENT TEMPERATURE AND AT ELEVATED TEMPERATURES

摘要

Micro-alloyed aluminium alloys containing complex sub-micro /or nano- sized strengthening phases are provided for use for example in the automotive industry. Existing commercial alloys are treated by adding at least one of the elements from Ni, Ag, Nb, Mo, Ce, La, Y and Sc at a level of more than 0.1wt.% but less than 0.5wt.% on top of the existing commercial alloy containing Si, Cu, Mg, Mn, Zn, and at least one type of sub-micron sized or even nano-sized TiB₂, TiC and AI₂O₃ solid particles at a level of more than 0.05wt.% but less than 0.5wt.% in the solidified castings.