Structural study of Cu-Cr mechanical alloying powders
DOI:
https://doi.org/10.3989/revmetalm.2006.v42.i5.31Keywords:
Mechanical alloying, Cu-Cr, Grain size, XRD, Stacking faultsAbstract
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 1x10–3–8x10–3 for Cu–1 weight % Cr and 3x10–3–8x10–3 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 1x1014–1x1015 m/m3.
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