Research on Structure and Impact Property of Hot Roll bonded laminated 7A01/7A52 Aluminum Alloy Plates

doi:10.3901/JME.260182

Abstract

Abstract: A rational design of constituent layer structures can effectively enhance the property of laminated composites. To improve the impact toughness of 7A52 aluminum alloy sheets, a hot roll bonding process was used to prepare 7A01/7A52 aluminum alloy plates, which significantly improved the impact toughness of 7A52 aluminum alloy sheets. The effects of the heterogeneous constituent layer structure on the microstructure and impact toughness of the 7A01/7A52 plate were investigated. The effects of the heterogeneous constituent layer structure on the microstructure and impact toughness of the 7A01/7A52 plate were investigated. The 7A52 hard aluminum alloy constituent layer retains an elongated fiber-like grain morphology, with an average size of 15 μm. The rational design of the soft 7A01 layer and the hard 7A52 layer significantly enhances the impact toughness of the 7A52 aluminum alloy sheet. When the thickness ratio of the soft to hard layers (H_7A01:H_7A52) is 1:3, the impact toughness of the plate is improved by 54.8% compared to that of the pure 7A52 sheet. This improvement is mainly attributed to the fact that, under impact loading, cracks initiate, deflect, and cause interfacial delamination at the interface, absorbing more energy. These findings provide a theoretical basis and process reference for the design of laminated aluminum alloys with high impact resistance.

Key words: laminated composites, layered structure design, impact toughness, interfacial morphology, energy absorption

CLC Number:

TG335

CAO Xianming, DANG Yuehui, CHEN Zejun, CONG Fuguan, ZHANG Yunlong, WANG Qiang. Research on Structure and Impact Property of Hot Roll bonded laminated 7A01/7A52 Aluminum Alloy Plates[J]. Journal of Mechanical Engineering, 2025, 62(6): 154-162.

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