Influence of aging treatments on the strength and localized corrosion resistance of aged Al–Zn–Mg–Cu alloy

Inhibitory Effect of Cerium Salts of Lower Carboxylic Acids on Al-Zn-Mg-Cu Alloy in NaCl Solution

“…Electrochemical, corrosion, and other properties of intermetallic particles present in Al-Zn-Mg-Cu aluminum alloys were analyzed. [6][7][8][9][10][11][12][13][14] In recent decades, researchers have paid great attention to the replacement of toxic and carcinogenic chromates, as corrosion inhibitors, and to the finding of environmentally friendly corrosion inhibitors for aluminum alloys. In the 1980s and 1990s, Hinton showed that lanthanide chlorides (La, Ce, Pr, etc.)…”

Effect of precipitates evolution on mechanical properties of Al 7050 alloy during secondary aging

“…The η precipitates (MgZn2) are non-coherent equilibrium phases with hexagonal structures and have low strengthening effects. High density η′ phases confer high strengths to this series of aluminum alloys during peak aging treatment [5,7,13,14]. After solution treatment and cold deformation, the tensile strength of Al 7050 alloy increased by more than 20% after peak aging [15].…”

“…Increased aging temperature and times resulted in coarsening of the precipitates and loss of strength [19,20]. However, other researches showed that the transformation of a large number of η′ precipitates into η precipitates also resulted in performance degradation [3,14]. Usually, the transition temperature from η′ to η precipitates occurs from 237 °C-247 °C [21].…”

The first-principles study of interfacial bonding strength and segregation behavior of alloyed elements at the η(MgZn2)/Al interface

“…10–13 The results show that the precipitation in the alloy substantially affects the characteristics of the alloy during aging treatment. 14–16 Li et al 17 employed various experimental techniques, like HRTEM, XRD, and EDX, to investigate the precipitation sequence of the η(MgZn 2 ) phase along low-angle grain boundaries in Al–Zn–Mg–Cu alloys subjected to aging at 135 °C for 5 min to 6 h. The findings reveal a precipitation sequence of super-saturated solid solution → vacancy-rich clusters → GP (GPI and GPII) → η′ precipitates → η precipitates. Notably, the nucleation and growth of the η′ phase and η phase play crucial roles in this sequence.…”