Experimental Investigation of Particle Break-up during Cold Deformation of Non Heat Treatable Aluminium Alloys

Abstract

In the present work, image analysis has been used for a quantitative description of particle size distributions in NHT-aluminium alloys. The influence of magnification on the experimental results has been investigated. The results demonstrate that more large particles are detected when the magnification is reduced. For the present investigation this is probably due to that a larger sample area is measured at the lowest magnification, thereby increasing the probability of finding large particles. The particle break-up during processing of NHT-alloys has been investigated after cold rolling and hot plane strain deformation. For cold rolling, there is an increased tendency for particle break-up with increasing strain for 1050 and 3003, with the 3003-alloy showing the strongest tendency for such a break-up. The 5005-alloy did not show any sign of break-up with increasing strain.