Abstract: The disclosure relates an Al—Mg series aluminum alloy sheet, a preparation method and use thereof. The preparation method includes: step S1, melting and casting the alloy raw materials in sequence to obtain an aluminum alloy ingot; step S2, subjecting the aluminum alloy ingot to a two-stage homogenization treatment so as to obtain a homogenized aluminum alloy ingot; and step S3, subjecting the homogenized aluminum alloy ingot to hot rolling, primary cold rolling, intermediate annealing, final cold rolling, and finished product annealing in sequence to obtain the aluminum alloy sheet.

Abstract: The present disclosure provides a 6xxx-series aluminum alloy sheet for an inner panel of a hood, and a preparation method and use thereof. The aluminum alloy sheet includes the following compositions in percentage by weight: 0.75%-0.95% of Si, 0.15%-0.35% of Mg, 0.2%-0.4% of Fe, 0.05%-0.2% of Mn, 0.06%-0.2% of Cr, less than or equal to 0.15% of Cu, and less than or equal to 0.15% of inevitable impurities in total amount, where each inevitable impurity is less than or equal to 0.05%, the balance is Al, and an atomic ratio of Mg to Si is (0.18-0.54):1. The sheet has high formability hood. After baking, the sheet has low yield strength on the premise of maintaining strength slightly exceeding strength requirement of a support structure, and further has a low strain rate sensitivity coefficient, satisfying the pedestrian protection requirement. The aluminum alloy sheet is conducive to recycle and remanufacture.