10.23. Compute Neighbor Slip Transmission Metrics

Group (Subgroup)

Statistics (Crystallographic)

Description

THIS FILTER ONLY WORKS ON Cubic m-3m LAUE CLASSES

This Filter calculates a suite of slip transmission metrics that are related to the alignment of slip directions and planes across Feature boundaries. The algorithm for calculation of these metrics is as follows:

1. Get the average orientation of the Feature

2. Get the Feature’s list of neighboring Features

3. Get the average orientation of each neighboring Feature

4. Calculate metrics given by equations in slip transmission metrics

5. Store metrics in lists for the Feature

6. Repeat for all Features

Note: The transmission metrics are calculated using the average orientations for neighboring Features and not the local orientation near the boundary. Also, the metrics are calculated twice (i.e., when Feature 1 has neighbor Feature 2 and when Feature 2 has neighbor Feature 1) because the direction across the boundary between the Features affects the value of the metric.

Luster-Morris Parameter (M’ Values)

The values are calculated as presented in [1].

Fracture Initiation Parameter (fip)

Three (3) fip values are computed as outputs to this filter. These are best explained in [2], see page 021012-4

Citations

[1] Luster, J., Morris, M.A., 1995. Compatibility Of Deformation In Two-Phase Ti-Al Alloys: Dependence On Microstructure And Orientation Relationships. Metallurgical and Materials Transactions A 26, 1745

[2] D. Kumar, T. R. Bieler, P. Eisenlohr, D. E. Mason, M. A. Crimp, F. Roters, and D. Raabe. On Predicting Nucleation of Microcracks Due to Slip Twin Interactions at Grain Boundaries in Duplex Near γ-TiAl. Journal of Engineering Materials and Technology, 130(2):021012–12, 2008. doi:10.1115/1.2841620.

Input Feature Data

Parameter Name	Parameter Type	Parameter Notes	Description
Average Quaternions	Array Selection	Allowed Types: float32 Comp. Shape: 4	Data Array that specifies the average orientation of each Feature as a quaternion
Feature Phases	Array Selection	Allowed Types: int32 Comp. Shape: 1	Data Array that specifies to which Ensemble each Feature belongs
Feature Neighbor List	NeighborListSelection		List of the contiguous neighboring Features for a given Feature

Input Ensemble Data

Parameter Name	Parameter Type	Parameter Notes	Description
Crystal Structures	Array Selection	Allowed Types: uint32 Comp. Shape: 1	Enumeration representing the crystal structure for each phase

Output Feature Data

Parameter Name	Parameter Type	Parameter Notes	Description
Luster-Morris M-Prime	DataObjectName		DataArray Name to store the calculated Luster-Morris Parameters
Fracture Initiation Parameter (F1)	DataObjectName		DataArray Name to store the calculated F1 Values
Fracture Initiation Parameter (F1spt)	DataObjectName		DataArray Name to store the calculated F1spt Values
Fracture Initiation Parameter (F7)	DataObjectName		DataArray Name to store the calculated F7 Values

Example Pipelines

License & Copyright

Please see the description file distributed with this Plugin

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