Similar to Alexey Fedorov , I recommend not concluding anything from this image. This is not sufficiently resolved, maybe try AFM if your SEM can't get it better?
I assume that this microstructure is very fine grained, but I recommend not to conclude anything from this image (Nothing is clear). A good polishing and a mirror surface finishing can help you to get a better image.
I don't know whether the specimen surface is etched or not. If yes, I think you did not focus as well as possible on the specimen surface. Try to magnify it more or use SEM.
the specimen is not prepared in right way because the scratches are obvious make the light scatter. re -prepare it and make sure that the surface of specimen is horizontal