Effects of short aging on thickening anisotropy of θ′ precipitate and mechanical properties of severe cold-rolled 2519A aluminum alloy plate
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The commercial 2519 aluminum alloy is a primary material for structural components of aircrafts, helicopters, and amphibians because of its low specific density, which favors the selection of aluminum alloys in weight-critical applications [1, 2]. To promote the mechanical properties of the alloys, severe plastic deformation (SPD) processes were explored such as equal channel angular pressing and severe cold rolling (SCR) [3, 4, 5, 6, 7, 8]. However, 2519A aluminum alloy for a new version of Al–Cu alloy was developed as armor material and scarcely fabricated by SPD processes. Valiev has reported that alloys produced by the SPD processes have increased strength with limited ductility . The increase in strength of 5083 aluminum alloy is always accompanied by a loss in ductility . A combination of equal channel angular pressing and low-temperature aging resulted in significant improvements in both ultimate tensile strength (UTS) and ductility in AA6061 and Al–10%Ag alloy [11, 12]....