Effect of hightemperature soak and cooling rate on recrystallization behaviour of tvvo Al–Mg alloys (AA 5252 and AA 5454)

Abstract

Almost all aluminium alloys that are to be produced in wrought form are subjected to an homogenization sequence involving a high-temperature soak and controlled cooling operation. The resulting structure is modified and in this communication it is shown that varying structures resulting from controlled homogenization produce differing reactions in the annealing operation subsequent to hot rolling. It is shown that the homogenization sequence may be designed such that recrystallization may be either retarded or enhanced and it is suggested that this preheat should be designed as part of the process to achieve optimum product properties.