The determination of an average grain size or a grain size distribution is an often used tool applied on EBSD measurements. I wonder how accurate the result can be if one considers the practically always existing drift, data "cleaning" (which is more a data manipulation), and the selection of the measurement area. Is there any recommendation how many grain one needs? I did not notice any standard deviation which takes all these known effects into account.
One good train of thought has been posted on edaxblog.com by Stuart Wright.
It depends on sample preparation and analysis of results. You can prepare your sample perfectly, but can mess up with analysis or vice versa. If you are new to the technique it will require some time to be able to fully understand machine and get to know all small tricks.
In overall it is very reliable method, but nevertheless combination of several methods is suggested to verify your results.
ISO 13067:2011 "Microbeam analysis -- Electron backscatter diffraction -- Measurement of average grain size" has a lot of useful info (NPL & certain other people had a hand in it). The Round Robin results that went with it might help - Ken Mingard (NPL) has presented them...
http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=52535
Is there any grain size limit related with the EBSD technique? I performed grain size analysis by using EBSD and optical microscope and I found really small grains by using EBSD (
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