The microstructure and mechanical properties of large strain rolled 2524 aluminum alloy sheet were investigated by means of optical microscope（OM）

differential thermal analysis（DSC）

X-ray diffraction（XRD）

tensile testing machine.The results reveal that the microstructure of the rolled 2524 aluminum alloy presents fibrous with a large amount of Al

2

Cu and Al

2

CuMg phases.With solid solution treated at 455 ℃ to 495 ℃

the higher solid solution treatment temperature and the longer treatment time are

the more second phase dissolved.After solution treated at 495℃for 60 min

the precipitated phase is basically dissolved

where the tensile strength

yield strength and elongation of 2524 aluminum alloy reach up to 412.6 MPa

350.7 MPa and 17.9%

respectively.After solid solution treated at 505℃

over-burning structure appears and thus the mechanical properties are weakened.After aging treatment

the strengthening phase is uniformly precipitated and the alloy is strengthened.The tensile strength

yield strength and elongation of the 2524 aluminum alloy after aging at 190 ℃ for 6 hare 464.6 MPa

395 MPa and 22%

respectively.