Abstract

Using the χ2-test a statistical method is described, which allows a clear decision whether a given distribution of orientation relationships between adjacent grains is random or not. The validity of this method even for small numbers of orientation relationships, as obtained from electron microscopical measurements, is shown by generating a small sample of randomly distributed orientation relationships and testing it against the calculated distribution. The method is applied to orientation relationships measured between α/α-, α/β- and β/β-neighbouring grains in single- and dual-phase brasses.