Mechanical vibration was utilized to strengthen bonding interface of the Al/Mg bimetallic composites. The effects of vibration frequency on the interfacial microstructure and mechanical properties of Al/Mg bimetallic composites by LFC solid-liquid composite casting were investigated. The results indicate that the vibration frequency has a significant effect on the interfacial microstructure and mechanical properties of Al/Mg bimetallic composites. With the increase of vibration frequency

the thickness of the intermetallic compound（IMCs） layer is decreased

resulting in the decrease of brittle phase of Al

3

Mg

2

and Al

12

Mg

17

and the Mg

2

Si phase at the interface is refined with a distribution change from agglomeration to dispersion. When the vibration frequency is 50 Hz

the shear strength of Al/Mg bimetallic composites reaches the maximum of 46.83 MPa

which is 47.13% higher than that of the Al/Mg bimetallic composites without vibration.