Abstract

The changes of grain size, microstrain, stacking fault probability, stacking fault energy and dislocations density on powder mixtures of copper with 1 and 3 weight % after high energy mechanical milling. The X-ray diffraction profile was analysed by Williamson-Hall (W-H) method. Grain size decreased with the increase of milling time, until values of 106 and 59 nm for 1 and 3 weight % Cr, respectively. As well microstrain increased with milling time. Stacking fault probability increased in function of milling time to value between 1×10 -3-8×10 -3 for Cu-1 weight % Cr and 3×10 -3-8×10 -3 for Cu-3 weight % Cr. The stacking fault energy decreased with milling time and amount of chromium. Finally, the dislocations density is between a range between 1×10 14-1×10 15 m/m 3.