Uneven Precipitation Behavior during the Solutionizing Course of Al-Cu-Mn Alloys and Their Contribution to High Temperature Strength

Figure 3

Transmission electron micrographs of precipitated particles in A₁ (a), A₂ (e), and A₃ (i) alloys as-solutionized; representative EDS (b) and SAD (c) results of the T_Mn phase in the A1 alloy; EDS (d) and SAD (g) results of the AlCu₃Mn₂ phase and EDS (f) of the T_Mn phase in the A2 alloy, respectively, marked by Arrows 1 and 2 in (e); EDS results (h, j) of the particles AlCu₃Mn₂ and T_Mn in the A3 alloy, respectively, marked by Arrows 3 and 4 in (i)