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Merge Colonies

Group (Subgroup)

Reconstruction (Grouping)

Description

This Filter groups neighboring Features that have a special misorientation that is associated with alpha variants that transformed from the same beta grain in titanium. The algorithm for grouping the Features is analogous to the algorithm for segmenting the Features, except the average orientation of the Features are used instead of the orientations of the individual Elements and the criterion for grouping is specific to the alpha-beta transformation. The user can specify a tolerance on both the axis and the angle that defines the misorientation relationship (i.e., a tolerance of 1 degree for both tolerances would allow the neighboring Features to be grouped if their misorientation was between 59-61 degrees about an axis within 1 degree of a2, as given by the 3rd special misorientation below).

The list of special misorientations can be found in the paper by Germain et al.1 and are listed here:

Angle Axis
0 Identity
10.529 c = <0001>
60 a2 = <-12-10>
60.832 d1 at 80.97 degrees from c in the plane of (d3,c)
63.262 d2 at 72.73 degrees from c in the plane of (a2,c)
90 d3 at 5.26 degrees from a2 in the basal plane

Parameters

Name Type Description
Axis Tolerance (Degrees) float Tolerance allowed when comparing the axis part of the axis-angle representation of the misorientation to the special misorientations listed above
Angle Tolerance (Degrees) float Tolerance allowed when comparing the angle part of the axis-angle representation of the misorientation to the special misorientations listed above
Use Non-Contiguous Neighbors bool Whether to use a non-contiguous neighbor list during the merging process
Identify Glob Alpha bool Whether to identify glob alpha regions during the merging process

Required Geometry

Not Applicable

Required Objects

Kind Default Name Type Component Dimensions Description
Feature Attribute Array NonContiguousNeighbors List of int32_t (1) List of non-contiguous neighbors for each Feature. Only needed if Use Non-Contiguous Neighbors is checked
Feature Attribute Array NeighborList List of int32_t (1) List of neighbors for each Feature
Element Attribute Array FeatureIds int32_t (1) Specifies to which Feature each Element belongs
Element Attribute Array Phases int32_t (1) Specifies to which Ensemble each Element belongs
Feature Attribute Array Phases int32_t (1) Specifies to which Ensemble each Feature belongs
Feature Attribute Array AvgQuats float (4) Specifies the average orientation of the Feature in quaternion representation
Ensemble Attribute Array CrystalStructures uint32_t (1) Enumeration representing the crystal structure for each Ensemble

Created Objects

Kind Default Name Type Component Dimensions Description
Element Attribute Array ParentIds int32_t (1) Specifies to which parent each Element belongs
Element Attribute Array GlobAlpha int32_t (1) Specifies to which glob alpha each Element belongs. Only created if Identify Glob Alpha is checked
Attribute Matrix NewFeatureData Feature N/A Created Feature Attribute Matrix name
Feature Attribute Array ParentIds int32_t (1) Specifies to which parent each Feature belongs
Feature Attribute Array Active bool (1) Specifies if the Feature is still in the sample (true if the Feature is in the sample and false if it is not). At the end of the Filter, all Features will be Active

References

[1] L. Germain, N. Gey and M. Humbert, Reliability of reconstructed Beta orientation maps in titanium alloys, Ultramicrscopy, 2007, 1129-1135.

Example Pipelines

Please see the description file distributed with this Plugin

DREAM.3D Mailing Lists

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