A COMPARISON OF 3 MECHANICAL MODELS FOR COLD ROLL BONDING METAL LAMINATES

Laminate metal composites are often made through cold roll bonding two or more independent sheets to establish a strong, metallic bond betwe en the metal layers without the incorporation of any liquid phase duri ng subsequent annealing. During the bonding process, it is important t o understand the nature of the bond formation within the roll bite, wh ich additionally requires an in-depth understanding of the distributio n of stresses and strains within the materials and their resulting def ormation behavior. Until this understanding is developed, the design o f roll bonding processes will continue to be trial and error and will remain problematic. In this paper, three recent roll bonding models ar e evaluated and recommendations are made for improving the validity an d accuracy of the models, particularly the necessity for the incorpora tion of bonding criteria along with the mechanics of roll bonding.