Annealing Effects in Twin-Roll Cast AA8006 Aluminium Sheets Processed by Accumulative Roll-Bonding

摘要: Ultrafine grained sheets were prepared from a twin-roll cast AA8006 aluminium alloy using accumulative roll-bonding process at room temperature. The evolution of microstructure after three passes during isochronal annealing with constant step 20 °C/20 min was studied by light and electron microscopy. influence the resulting on mechanical properties monitored microhardness measurements. increases when material is annealed up to 160 °C. Above this temperature fast drop occurs followed negligible variation temperatures exceeding 300 In order map continuously changes annealing, in situ TEM experiments heating stage performed as supplement post-mortem observations.