Hello everyone,
There are two parts to this question:
1. How to calculate misfit between two phases in different lattice structures (e.g. A phase in hcp vs B phase in bcc) from High-Angle annular dark-field (HAADF) images? Are there other ways in addition to using S/TEM images?
2. How to determine specific orientation relationships between two structurally different phases (still e.g. A phase in hcp vs B phase in bcc) from TEM SAD pattern, HAADF images, and FFT transferred maps from HAADF images?
Thanks in advance for any answer and your time.
Thanks for your answer Ashraf Ashraf Alattar
.That paper you mentioned was really a good example and of good help in understanding this question.
But my point here is to simply figure out a specific orientation relationship between two phases. I got some quick answers and one of them I think can be very convenient on how to find specific OR between two phases is: Locate the interface between two phases in TEM and use an appropriate SAD aperture to let the interface exposed only and get the SAD patterns for that interface, which should give the area including both phases in the aperture. Then the imaging of the corresponding SAD patterns should contain two groups of reflections where the first one (usually matrix phase should be on zone axis already in this case) can be easily known and the precipitation phase can be further indexed from its reflection.
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