10.26. Find Twin Boundaries
Group (Subgroup)
Statistics (Crystallographic)
Description
This Filter identifies all Triangles between neighboring Features that have a σ = 3 twin relationship. The Filter uses the average orientation of the Features on either side of the Triangle to determine the misorientation between the Features. If the axis-angle that describes the misorientation is within both the axis and angle user-defined tolerance, then the Triangle is flagged as being a twin. After the Triangle is flagged as a twin, the crystal direction parallel to the Face normal is determined and compared with the misorientation axis if Compute Coherence is selected. The misalignment of these two crystal directions is stored as the incoherence value for the Triangle (in degrees). Note that this Filter will only extract twin boundaries if the twin Feature is the same phase as the parent Feature.
Algorithm Modifiers
Parameter Name |
Parameter Type |
Parameter Notes |
Description |
|---|---|---|---|
Find Coherence |
Bool |
If true, compute the coherence between the Face normal and the misorientation axis |
|
Axis Tolerance (Degrees) |
Scalar Value |
Float32 |
Degree of tolerance for angular distance from the [111] axis |
Angle Tolerance (Degrees) |
Scalar Value |
Float32 |
Degree of tolerance for angular deviation from 60 degrees |
Output Type for Twin Boundaries Array |
Choices |
The Twin Boundaries Array is essentially a mask; This allows for determining how the mask is stored; uint8 recommended. |
Input Face Data
Parameter Name |
Parameter Type |
Parameter Notes |
Description |
|---|---|---|---|
Face Labels |
Array Selection |
Allowed Types: int32 Comp. Shape: 2 |
Specifies to which Feature each Face of Triangle belongs to |
Face Normals |
Array Selection |
Allowed Types: float64 Comp. Shape: 3 |
Specifies the Normal of each face. Only required if Find Coherence is checked |
Input Feature Data
Parameter Name |
Parameter Type |
Parameter Notes |
Description |
|---|---|---|---|
Average Quaternions |
Array Selection |
Allowed Types: float32 Comp. Shape: 4 |
Specifies the average orientation of the Feature in quaternion representation |
Feature Phases |
Array Selection |
Allowed Types: int32 Comp. Shape: 1 |
Specifies to which Ensemble each Feature belongs |
Input Ensemble Data
Parameter Name |
Parameter Type |
Parameter Notes |
Description |
|---|---|---|---|
Crystal Structures |
Array Selection |
Allowed Types: uint32 Comp. Shape: 1 |
Specifies the crystal structure for each phase (in enumeration representation) |
Output Face Data
Parameter Name |
Parameter Type |
Parameter Notes |
Description |
|---|---|---|---|
Twin Boundaries Array name |
DataObjectName |
The name of the array that will act as a mask for which triangles do make up a twin boundary (true) |
|
Twin Boundaries Incoherence Array name |
DataObjectName |
The name of array that contains the crystal direction parallel to the Face normal determined relative to the misorientation; values are 180 by default |
Example Pipelines
License & Copyright
Please see the description file distributed with this Plugin
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