Abstract:A Fe/Al clad tube was prepared by explosive welding. Then the bonding characteristic of the interface was investigated by compression, flattening and compression-shear test. The test results exhibit that the clad tubes possessing good bonding interface have higher shear strength than that of pure aluminum and can bear both axial and radial deformation. The original interface between aluminum layer and ferrite layer was observed by scanning electron microscopy (SEM). The results show that the clad tubes with good bonding properties possess the interface in wave and straight shape. The Fe/Al clad tube was used to manufacture the T-shape by hydro-bulging. It is found that the good-bonding interface of the Fe/Al clad tube plays a dominant role in the formation of the T-shape.

Key words: Fe/Al clad tube; bonding property; interface; plastic deformation; T-shape; hydro-bulging