论文部分内容阅读
A common feature of precipitation hardenable aluminium alloys is that their microstructures contain a uniform distribution of plate-or lath-shaped precipitates of intermediate or equilibrium phases, which form parallel to low-index planes of the aluminium matrix phase.These precipitate phases include {100}α plates of θphase in binary A1-Cu alloys, {111}α plates of T1 phase in Li-modified Al-Cu alloys and Ω phase in A1-Cu alloys microalloyed with Mg and Ag.All are key strengthening phases in high strength and ultra-high strength aluminium alloys.