Accumulative Roll Bonding of 7075 Aluminium Alloy at High Temperature
The 7075 Al alloy was processed by accumulative roll bonding (ARB) at 300, 350 and 400 °C. The microstructure and texture were characterized and the hardness was measured. Cell/(sub)grain sizes less than 500 nm and typical β-fibre rolling texture were observed in the three ARBed samples. At 400 °C, the presence of elements in solid solution leads to a poorly misoriented microstructure and to a homogeneous β-fibre texture. At 300 and 350 °C highly misoriented microstructure and heterogeneous β-fibre rolling texture are observed, especially at 350 °C, wherein the degree of dynamic recovery is higher. Hardness of the ARBed samples is affected by the amount of atoms in solid solution at the different processing temperatures.
T. Chandra, N. Wanderka, W. Reimers , M. Ionescu
P. Hidalgo et al., "Accumulative Roll Bonding of 7075 Aluminium Alloy at High Temperature", Materials Science Forum, Vols. 638-642, pp. 1929-1933, 2010