Effect of Deep-Cooling Rolling Deformation on the Microstructure and Mechanical Properties of an Al-4.5Cu-1.5Mg-0.6Mn-0.2Ti Alloy

The impact of deep cold rolling deformation on the mechanical characteristics and microstructure of Al-4.5Cu-1.5Mg-0.6Mn-0.2Ti alloy sheets were investigated using electronic universal testing, optical microscopy, and scanning electron microscopy (SEM). The findings indicated that during the cryogenic rolling process, the second-phase particles were broken and became more numerous. The primary constituents were the θ-Al₂Cu and S-Al₂CuMg phases. As the rolling pressure increased, the tensile strength of the alloy increased, while its elongation decreased. The ideal complete mechanical properties were attained at 50% rolling pressure, with a tensile strength and elongation of 543 MPa and 7.8%, respectively. If deep cold rolling was applied, the texture type shifts from τ-fibers to α-fibers; otherwise, it remained the same, and the texture strength increased as the rolling deformation increased.