“…Nevertheless, the fabrication of high-strength metals generally involves long-term processing conducted under extreme conditions using special facilities. Accordingly, processing by HPT was extended recently as a powder consolidation technique in mechanical alloying for fabricating dissimilar metallic systems based on Al and Mg; for example, Al-Fe, [4] Al-Mg, [5] Al-Ni, [6] Al-Ti, [7] Al-W, [8,9] and Mg-Zn-Y. [10] Nevertheless, there are practical difficulties associated with powder processing because of the requirements of high temperatures [6,7,9,10] or the use of a two-step process of cold/hot compaction prior to HPT consolidation [8] and the consequent inherent damage that may be imparted to the HPT anvils because of the stacking of fine hard powders in the depressions on the anvil surfaces.…”