Analysis of clad sheet bonding by cold rolling

Cold roll bonding of multi-layered bi-metal laminate composites

“…With the objective of predicting the rolling force and torque, a few models have been devised for roll bonding of two or three layer systems [21][22][23][24][25][26][27][28]. These deal primarily with the cladding of metals.…”

“…Further studies involved analysis of rolling of two layers or three layers bi-metal sheets without using a numerical method [23,24]. Other modeling work made use of the extended upper-bound method [25][26][27][28]. However, this method cannot give the stress field of the clad sheet [23].…”

Effective parameters on bonding strength of roll bonded Al/St/Al multilayer strips

“…6, any increase in total composite reduction moves the created inter-layer bonding point towards the roll entrance [34][35][36]39]. This shift can be interpreted in terms of the critical deformation required for a cold bond establishment.…”

“…This shift can be interpreted in terms of the critical deformation required for a cold bond establishment. Therefore, it can be stated that the creation of inter-layer bonding point originates from existence of the critical strain [39]. That is because considering the definition of critical deformation, i.e., the required minimum strain for cold bond creation, it is clear that the bonding point is a situation in roll gap in which the strain has reached the critical amount.…”

“…It has been stated that increasing the total reduction of tri-layer strip increases the parameters of mean contact pressure on interlayer interface, individual layers deformation and exertion time of mean contact pressure on inter-layer bonding [34][35][36][37][38][39][40]. Considering the mechanism of roll bonding between tri-layer metals, increasing each layer's deformation as well as the mean contact pressure on inter-layer interfaces cause the increasing of the number and size of the surface cracks oriented perpendicular to the rolling direction and promotion of virgin metal extrusion on inter-layer interface.…”