Ponentes
Descripción
The structural and microstructural characterization by means of X-ray diffraction (XRD) of the aluminum-titanium alloys (AlxTi3-x, 0.5 ≤ x≤ 0.20) is presented. The analysis showed the occurrence of an order-disorder phase transition in the studied compositional range. The presence of a minor fcc phase within the hcp matrix of the AlTi3 alloy showed evidence of the presence of stacking faults. The probability of occurrence of this type of defect depends on the chemical composition and on the distance between atomic layers (order parameter). The microstructural analysis using the Warren-Averbach and Williamson-Hall methods shows that a decrease of Al content not only decreases the probability of occurrence of planar defects but also leads to a decrease in the average crystallite size and to an increase of the average non uniform microstrain value in the alloy. Deformation defects (α) predominate in this type of alloy.
