Investigations concerning the growth of intermetallic phases during the heat input both at the diffusion annealing of copper
aluminum roll claddings and the subsequent welding process of copper-aluminum connections by using roll cladded inserts are
compared to the analytical determination of phase growth. The temperature distribution in the cladding interface has been
determined by thermal simulation, in order to calculate the growth of the intermetallic phases. A comparison between the width
of the phases in the analytical calculation and the experiment is achieved. In consideration of high welding speeds, the energy
input during the welding process is appraised in order to grade the growth of intermetallic phases. Furthermore the prevention of
damage in the roll cladding interface by means of unadapted material thicknesses or welding parameters can be assessed
analytically and numerically. The numerical simulations can determine the critical thickness of the roll cladding to avoid damage
like exceeding growth of intermetallic phases.