Effect Of Processing Technics On Microstructure And Properties For 5052 Alloy Sheet

In order to investigate the effect of processing technics on microstructure and properties for 5052 aluminum alloy, technology schedule experiments including Gleeble-1500D thermal- mechanical simulation for breakdown hot rolling (rough rolling) process, multistand hot rolling (finish rolling) processing at different finishing temperature as well as cold rolling and annealing experiments have been carried out. Furthermore, mechanical properties and electrical conductivity were investigated by means of Vickers hardness, tensile test and conductivity measurement. The effects of processing technology on microstructure and precipitation behavior were studied by optical microscopy (OM), polarized optical microscopy (POM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and differential scanning calorimetry (DSC). The results show that dynamic recovery is the basic softening mechanism during isothermal compression and geometric dynamic recrystallization (GDRX) is induced at elevated temperature condition. The softening in delay time is due to static recrystallization (SRX).The recrystallization progress is accelerated obviously when the finishing temperature is increased and intermediate annealing can be cancelled. Strain hardening exponent is increasing first and then decreasing with the increasing of strain under different processing states.