Microstructure evolution of Al-Mg-Si alloy through warm equal channel angular pressing

Abstract:In this study, microstructure evolution through dynamic ageing characteristics associated with theapplication of equal channel angular pressing (ECAP) to Al6061 alloy at elevated temperatures was investigated.Followed by ECAP, microstructural observations were undertaken using transmission electron microscope. Thecombination of the ECAP process with dynamic ageing at both 100 °C and 150 °C resulted in a significant increase inpressing load. The grain size was measured about 160 nm after 4 passes. A comparison with the published data on thesame alloy processed by ECAP at room temperature and statically aged, suggests several advantages in incorporatingdynamic ageing with ECAP. These advantages consist of the ability to attain better grain refinement, increasedmechanical properties and the potential for saving time and energy.

کلیدواژه ها:

equal channel angular processing ، microstructure evolution ، TEM ، Aluminium alloy