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

The mechanical properties, corrosion behavior, and microstructures of Al-Zn-Mg-Cu alloy during non-isothermal ageing (NIA) process were investigated. The results suggest that hardness and tensile strength generally keep improving with increasing ageing degree until the level of 182 HV and 578 MPa (cooled at 120 ℃, or C120), apart from a slight decline at the region where the temperature is beyond 200 ℃. Synchronously, the electrical conductivity increases and corrosion susceptibility decreases as the ageing proceeds. The optimal performance of the alloy is obtained at the C120 condition, whose electrical conductivity, stress corrosion susceptibility r tf and maximum corrosion depth are 40.3 %IACS, 98.2% and 24.7 μm, respectively. GPI zones and η' phases are the primary ageing precipitates at the heating stage (100–210℃, 40℃/h), then η' phases are the main ones at the cooling stage (210–100℃, 20℃/h). Reasonably, the combination of high strength and favorable corrosion resistance of the alloy through NIA treatment are associated with the growth and coarsening of intergranular precipitates during heating and newly formed fine intragranular ones during cooling.

Mechanical properties, corrosion behavior and microstructures of a non-isothermal ageing treated Al-Zn-Mg-Cu alloy

Aging behavior and precipitate characterization of a high Zn-containing Al-Zn-Mg-Cu alloy with various tempers

Effects of pre-treatments on aging precipitates and corrosion resistance of a creep-aged Al–Zn–Mg–Cu alloy

The effects of non-isothermal aging on the strength and corrosion behavior of AlZnMgCu alloy

Effect of cooling aging on microstructure and mechanical properties of an Al–Zn–Mg–Cu alloy

Microstructural characterization and mechanical properties of Al/Ti joint welded by CMT method—Assisted hybrid magnetic field

Heating aging behavior of Al–8.35Zn–2.5Mg–2.25Cu alloy

Measuring thermal conductivity of materials at room temperature in atmosphere by using a continuous-wave laser and neural network model

Interface reaction of U3Si2-UO2 composite pellets during spark plasma sintering

Bingqing Li

Papers

Effect of cooling aging on microstructure and mechanical properties of an Al–Zn–Mg–Cu alloy

Microstructural characterization and mechanical properties of Al/Ti joint welded by CMT method—Assisted hybrid magnetic field

Heating aging behavior of Al–8.35Zn–2.5Mg–2.25Cu alloy

Measuring thermal conductivity of materials at room temperature in atmosphere by using a continuous-wave laser and neural network model

Interface reaction of U3Si2-UO2 composite pellets during spark plasma sintering