Why have EBSD grain size standards?

• Grain size is the basis of many product standards and specifications.
• Existing standards are often based on linear intercepts from (optical) micrographs.
• EBSD increasingly replacing optical methods because of improved spatial resolution and crystallographic data.

Why is a round robin needed?

• EBSD methods for grain size measurement are complementing traditional methods.
• New standards have been/are about to be issued but are untested – do they lead to 'good’ results?
• Repeatability (within lab) and Reproducibility (interlab) data is needed to support the
  new standards.
• There is little correlation of EBSD with other existing techniques.