I was conducting EBSD (Electron Back Scatter Diffraction) of a forged beta titanium alloy (Ti-10V-2Fe-3Al).
The alloy cylinder was heat treated (solutionized + aged) after forging in beta phase field. However after conducting EBSD (along and perpendicular to direction of forging) the phase fractions turned out to be different. It is similar to what was found in this paper (on Page 4) (Article Characterization of fracture and deformation mechanism in a ...
).Can someone pls explain why we are getting this difference?
I am getting 60 percent beta 40 percent alpha along Longitudinal direction but 85 percent alpha and 15 percent beta along transverse direction.
If you have anisotropic 3d microstructure you can - performing 2d-type analysis - have highly non-representative defect densities. In case of dislocation densities (counting density of intersection points) you can have this if all dislocations are parallel to one direction. Also in the case of a strictly lamellar microstructure, the phase fractions can be highly different, if you the lamellae normal is perpendicular or inside the 2d section.
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