Measuring the Five Parameter Grain Boundary Distribution From Observations of Planar Sections

Published

February 19, 2017

Author(s)

D M. Saylor, B S. El-Dasher, B L. Adams, G S. Rohrer

Abstract

A stereological method is described for estimating the distribution of grain boundary types in polycrystalline materials over the five macroscopically observable parameters on the basis of observations from a single planar section. The grain boundary distribution is derived from measurements of grain orientations and the orientations of the lines formed where grain boundaries intersect the plane of observation. Tests of the method on simulated observations illustrate that the distribution of boundaries in a material with cubic symmetry can be reliably determined with about 10 of resolution from the analysis of 5x10⁴ or more line segments. Furthermore, grain boundary distributions directly observed from serial sections of a SrTiO₃ polycrystal are compared to those resulting from the stereological analysis of a single plane. The comparison shows that the stereological method provides a reasonable estimate of the measured distribution. The differences between the directly observed grain boundary distribution and that derived from the stereological analysis are consistent with the results from the simulation.

Citation

Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science

Pub Type

Journals

Keywords

electron back-scatter diffraction (EBSD), grain boundary distribution, grain boundary plane, misorientation, orientation mapping, serial sectioning, stereology

Citation

Saylor, D. , El-Dasher, B. , Adams, B. and Rohrer, G. (2017), Measuring the Five Parameter Grain Boundary Distribution From Observations of Planar Sections, Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science (Accessed October 14, 2024)