Last month we started investigations of new batch of KoBo deformed zinc along with zinc deformed conventionally. For each method two types of initial material with different history have been used. This way influence of method and type of starting material microstructure on final properties can be investigated and compared. Samples for EBSD were prepared as usual, by mechanical grinding and then mechanicall and electrolyticall polishing.
First sample had lots of twins in its microstructure, therefore we decided to repeat the preparation this time using nitric acid etching to remove layers of deformed grains before the polishing. Remaining samples did not contain any visible twins, so they were investigated in original state.