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F. Warchomicka, C. Poletti, P. Homporova, H.P. Degischer:
"Methodology for the study of microstructural changes in Ti alloys: Techniques of analysis to be used in MITI64";
Report No. Zwischenbericht, 2008; 14 pages.

The present report shows a brief description of techniques of analysis of the microstructural behaviour in order to improve the characterization of titanium alloys in thermomechanical processes. The use of thermal analyisis such as dilatometry and differential scanning calorimetry (DSC) are appropiate for the study of the kinetics of transformation as well as to determine the presence of mechanisms of restoration. Electron backscatter diffraction (EBSD) helps to determine the mechanism active during deformation revealing substructure formation and determining the processes of restoration in function of the process parameter. In specific cases, the use of synchrotron microtomography allows to study the 3D morphology, the location and the distribution of the alpha and beta phases as well as different deformation and damage mechanisms in deformed samples. Examples of these techniques applied in titanium alloys are shown.

Titanium alloys, metallography, Dilatometer, DSC, Phase transformation, EBSD