The Effect Of Copper Addition On Microstractural Parameters Of An Aluminium Alloy Processed By Equal Channel Angular Pressing

Equal-Channel Angular pressing (ECAP) was conducted to 2017 and 1100 aluminium alloys. X-ray patterns show the presence of precipitates in both alloys. ECAP leads to an increase of the lattice thus the relative swelling parameters for the first alloy and to a small decrease of these parameters for the second. Peak broadening was related to a reduction of coherency length which reaches 54 nm for the 2017 alloy whereas it is reduced only to 80 nm for the other alloy and to an increase of the root mean square strain which reaches 0.56% for the first alloy but it close only to 0.2% for the second alloy.