Al–Cu alloys are widely used in aerospace, automobile, and other fields, due to
their high strength-to-weight ratio. Among all compounds in the Al–Cu system, the
Al2Cu phase has been extensively investigated due its significant effect on the
properties of Al–Cu alloys. The formation of Al2Cu compound is monitored by the
application of X-ray powder diffraction method. The X-ray diffraction analysis was
performed on the Al-Cu alloys and on pure aluminium and pure copper, using a
wide range of angles (2q) from 5 to 100o
with a step size of 0,02o
and a holding
time of 0,40 sec. at each step. The following microstructural parameters have been
calculated: the average sub-grain size, the microvoltage and the dislocation density.
Al2Cu phase were identified in all samples in view of the XRD and EDS analyses.
