Bond Strength of Ultrafine Grained Zr Fabricated by Accumulative Roll Bonding

The bond strength of ultrafine grained Zr with a grain size of 0.4 mu m, fabricated by accumulative roll bonding (ARB), was assessed. The shear strength of the bond was estimated to be about 20% of the shear fracture strength of the as processed metal, a ratio significantly higher than that found in other materials processed by similar methods. The favorable degree of bonding achieved is attributed to the high ductility of Zr as well as to the high reductions used during the ARB process.