Effect of trace rare earth element Er on Al-Zn-Mg alloy

Grain Refinement of the Al-Cu-Mg-Ag Alloy with Er and Sc Additions

“…The dispersed Al 3 Er phase acts as the site for heterogeneous nucleation of g(MgZn2) phase and enhances the mechanical properties. Fu and Yang [23][24][25] have studied the high pure aluminum and the Al-Mg alloy with addition of Er and found the existence of Al 3 Er phase. The study carried out by Nie revealed that the addition of Er in Al-4Cu alloy mainly forms a Al 8 Cu 4 Er phase.…”

Alloying behavior of erbium in an Al–Cu–Mg alloy

“…Based on the research by Karnesky et al [13], Er seized the position of Sc up to at least 30% in crystal lattice of near-stoichiometric Al 3 (Sc 1−x Er x ) precipitates with the L1 2 structure in Al-0.06Sc-0.02Er (at.%) alloy, suggesting Er can replace the more expensive Sc in the precipitates. Many investigations also found the Al 3 Er phase present in Al-5Mg-1Er alloy [17], Al-4.5Mg-0.7Mn-0.1Zr-0.6Er alloy [18], 5083 alloy [19] and A1-6Zn-2Mg-0.4Er alloy [20]. Mao et al [21] demonstrated that both Al 3 Er phase and ternary AlCuEr phase were present in Al-5.91Zn-1.81Mg-1.78Cu-0.22Er alloy.…”

“…Extensive research has established that nanoscale Al 3 Er is a promising precipitate capable of precipitation strengthening and also can inhibit recrystallization [18,20]. The fine secondary Al 3 Er particles, precipitated from the supersaturation, anchor the dislocations strongly retarding the motion of the dislocations and improve the shear stress necessary for the dislocations to slide [20].…”

“…The fine secondary Al 3 Er particles, precipitated from the supersaturation, anchor the dislocations strongly retarding the motion of the dislocations and improve the shear stress necessary for the dislocations to slide [20].…”

Thermal Stability of Cryomilled Al-Mg-Er Powders

“…Less costly trialuminide phase forming alternatives to Sc include lanthanide elements such as Er ($540/100 g [7]). Additions of Er (<1 wt.%) to wrought AlMg series alloys have been investigated [8][9][10][11]. Similar to Sc effects, Er addition retards the recrystallization of deformed structures in Al-Mg alloys.…”