Recent advances in ageing of 7xxx series aluminum alloys: A physical metallurgy perspective

Effects of retrogression and reaging heat treatment on the microstructure, exfoliation corrosion, electrical conductivity, and mechanical properties of AA7050

“…In the RRA process, the material is heat treated in short periods and at low temperature and then aged under the same conditions as T6 (120°C/24 hr). With RRA heat treatment, the material is resistant to corrosion while maintaining its mechanical strength . The strength value of the 7050 aluminium alloy treated with RRA can reach up to T6 treatment …”

Study on quenching sensitivity of 7097 aluminum alloy

“…Here, the conductivity of alloy after isothermally holding for 48 h at 320°C is 44.0% IACS. According to the conductivity data obtained by the experiment (figures 2(a) and (b)), and the j in different isothermal holding temperature is calculated in terms of equation (2). The TTT curves are shown in figure 2(c).…”

“…Al-Zn-Mg-Cu (7xxx series) aluminum alloys are widely used in transportation and aerospace due to their low density, high strength and super toughness [1,2]. With the development of the aerospace industry, there is a trend to pursue higher strength and low quenching sensitivity properties for aluminum alloy thick section plates and forging.…”

Effects of graphene addition on the microstructure of 7075Al

“…Al-Zn-Mg-Cu alloys are a kind of crucial structural materials with high specific strength, superior machinability and mechanical properties [1], which makes them widely used in lightweight aerospace and automobile industry [2][3][4][5][6]. In the industrial production of Al-Zn-Mg-Cu alloy, casting is the most commonly used manufacturing technology [7]. Therefore, it is necessary to study the as-cast microstructure since they have a genetic effect on the subsequent treatment [8,9].…”