The accumulative roll-bonding process was used to join Al (11•0)/Mg (AZ31) alloys and then make it thinner and longer by multi-rolling. Stacks with 24 layers were created and annealed (300C, 1h). The microstructures were observed by using optical microscopy. The diffusion couples between Al and Mg were investigated to study the composition of the Al-Mg system. Layers of the intermetallic compounds Al3Mg2 and Al12Mg17 were observed by field emission scanning electron

microscopy. The composition-depth curves of the diffusion zone were obtained by means of electron microprobe analysis after annealing (300C, 1h).

Diffusion and Formation of Intermetallic Compounds during Accumulative Roll-Bonding of Al/Mg Alloys. M.C.Chen, C.W.Kuo, C.M.Chang, C.C.Hsieh, Y.Y.Chang, W.Wu: Materials Transactions, 2007, 48[10], 2595-8