No abstract

The effect of surface modification of insert metal on the bond strength of the bonded interface of aluminum casting alloy was investigated by SEM and EDX observations of bonded interfaces and fractured surfaces. The surface of Zn insert metal was modified by boiling in formic acid and acetic acid, although the surface of the AC2C and ADC12 casting alloy were only polished. Bonding was performed at bonding temperature of 673-733 K under a pressure of 20 MPa (bonding time of 15 min). As a result of surface modification by formic acid and acetic acid, a higher interfacial strength joint is obtained at lower bonding temperature compared with non-modified joints.