The A356/2024 sheet was fabricated by solid-liquid rolling.The solidification structure and element distribution near the interface of A356/2024 sheet were detected systematically by SEM and EDS.The bonding strength of the interface was evaluated by hardness and XRD.The results reveal that the cracks

pores and other defects at the interface of A356/2024 sheet are disappeared gradually with the increase of pouring temperature of the liquid metal.The interdiffusion of alloy elements in A356 aluminum alloy and 2024 aluminum alloy occurs and there exists an about 110μm wide diffusion layer near the interface

indicating metallurgical bonding.The elements at the interface are enriched to form hard brittle phases such as Al2 CuMg and CuAl2 intermetallic compounds at the lower pouring temperature.The hardness near the interface of A356/2024 sheet is changed from 61.5 HV to 123.9 HV sharply.Therefore

it is easy to cause brittle fracture at the interface and reduce the bonding strength.The elements at interface are diffused uniformly on the both sides at the higher pouring temperature

which is not easy to form the accumulation of elements.The hardness of the compound sheet is increased from 63.3 HV to104.5 HV at one side of the A356 aluminum alloy along the vertical direction of the interface to 2024 aluminum alloy

showing agradient change trend with the firm interface bonding.