Gert Nolze, Ralf Hielscher: IPF coloring of crystal orientation data

Author(s):

Gert Nolze
Ralf Hielscher

Title:

Gert Nolze, Ralf Hielscher: IPF coloring of crystal orientation data

Electronic source:

application/pdf

Preprint series:

Technische Universität Chemnitz, Fakultät für Mathematik (Germany). Preprint 01, 2016

Mathematics Subject Classification:

    none []

Abstract:

The inverse pole figure (IPF) coloring for a suitable evaluation of crystal orientation data is discussed. The major goal is a high correlation between encoding color and crystal orientation. Revised color distributions of the fundamental sectors are introduced which have the advantages of 1) being applicable for all point groups, 2) do not cause color discontinuities within grains, 3) featuring carefully balanced regions for red, cyan, blue, magenta, green and yellow, and 4) an enlarged grayish center in opposition to a tiny white center. A new set of IPF color keys is proposed which is the result of an thorough analysis of the colorization problem. The discussion considers several topics: a) the majority of presently applied IPF color keys generates color discontinuities for specifically oriented grains, b) if a unique correlation between crystal direction and color is requested, discontinuity-preventing keys are possible for all point groups, except for -4, -3 and -1, c) for a specific symmetry group several IPF color keys are available visualizing different features of a microstructure, and d) for higher symmetries a simultaneous IPF mapping of two or three standard reference directions is insufficient for an unequivocal orientation assignment. All color keys are available in MTEX, a free-available Matlab toolbox.

Keywords:

Crystal Symmetry, Visualization

Language:

English

Publication time:

2/2016