I have tried doing ebsd but it is not giving a lot of un indexed points. So I dont know if the unindexed points are finer alpha titanium or beta titanium. During electro polishing the softer beta phase is getting etched off giving unindexed points on the IPF map .
Adib Ebrahimi Ti6Al4V both. But one is additively manufactured other one is wrought sample.
I think its will be better for u to work on matlab and make crystal mapping of your spicement, like this .
Ketan Khamgaonkar May I know which solution did you use for electropolishing and voltage?
Dear Ketan,
Correct me if I am wrong, but in case you are just interested in the volume fractions of α- and β-phase in your alloy (and if we are not talking about (partial) martensitic structures with retained β-phase or structures in which you have extremely narrow β-regions), shouldn’t one be able to do a simple metallographic approach, e.g. by using one of the point-grid-methods?
After normal grinding and polishing etch the sample with e.g. Kroll’s reagent to make the two phases visible. Take images (depending of the microstructure and the accuracy you need use optical microscopy or SEM, high resolution SEM images might even resolve extremely fine β-laths), binarize the image (e.g. α white, β black) and count the number of black and white pixels (high accuracy) or use a point grid and count the points. In case, high-resolution SEM-images are needed and hence the investigated area per image is small, take a larger number of images to improve the statistics.
In case, you need to do EBSD, I would recommend using vibration polishing as the final polishing step as this minimizes the retained deformation and should, thus, reduce the number of unindexed regions. In case, this still fails, the use of hard X-rays might be advisable, as in contrast to standard XRD also very small volume fractions of phases can be detected.
Kind regards, Carsten
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