Extracting the "Recrystallized fraction" map from new AztecCrystal

Extracting the "Recrystallized Fraction" map in AztecCrystal, which replaces the functionalities of Channel5, involves understanding the new software's tools and methodologies. Here's a detailed guide to help you replicate the "Recrystallized Fraction" map using AztecCrystal.

Understanding Recrystallization Criteria

In general, recrystallized, substructured, and deformed grains can be differentiated based on the following criteria:

Deformed Grains: These grains typically have high internal strain and low orientation uniformity.

Substructured Grains: These grains have lower internal strain than deformed grains but still exhibit some internal misorientation.

Recrystallized Grains: These grains have low internal strain and high orientation uniformity.

Tools in AztecCrystal

AztecCrystal provides various tools to analyze and classify grains, including the Classify function and the Grain Orientation Spread (GOS) map.

Steps to Extract the "Recrystallized Fraction" Map

1. Grain Orientation Spread (GOS) Map

The GOS map is a key tool to differentiate between recrystallized and deformed grains.

Recrystallized Grains: Generally have a low GOS value (e.g., GOS < 2°).
Deformed Grains: Generally have a high GOS value (e.g., GOS > 2°).

2. Classify Function

The Classify function can be used to create a custom classification scheme based on your criteria for recrystallized, substructured, and deformed grains.

Step-by-Step Process

Load EBSD Data:Open AztecCrystal and load your EBSD data file.

Generate GOS Map:Navigate to the GOS map function. This can usually be found under the "Maps" or "Grain" analysis sections. Configure the GOS map parameters to reflect your criteria for recrystallized and deformed grains. For example, set the threshold values for low and high GOS.

Classify Grains Using GOS:Use the Classify function to set up a classification scheme. Define three classes: Recrystallized, Substructured, and Deformed.Recrystallized: GOS < 2° (or your specific threshold). Substructured: Intermediate GOS values (e.g., 2° < GOS < 5°). Deformed: GOS > 5° (or your specific threshold).

Training the Classifier:If using the training software feature, manually classify a few regions of interest to train the classifier. Save the trained classifier for future use.

Apply Classification:Apply the classification scheme to your entire dataset. Generate the classification map that shows different colors for recrystallized, substructured, and deformed grains.

Extract Recrystallized Fraction Map:Export the classified map or specific fraction maps from the results. Use the software’s export functions to save the recrystallized fraction map.

Example Parameters

These are example parameters; you should adjust them based on your specific material and observations:

Recrystallized: GOS < 2°
Substructured: 2° ≤ GOS ≤ 5°
Deformed: GOS > 5°

Final Notes

Criteria Adjustment: The specific GOS thresholds for recrystallized, substructured, and deformed grains might vary based on your material and experimental conditions.
Consult Documentation: Always refer to the AztecCrystal user manual for detailed instructions and advanced settings.
Software Updates: Ensure that you are using the latest version of AztecCrystal, as software updates can introduce new features and improvements.

By following these steps and adjusting the parameters according to your specific needs, you should be able to replicate the "Recrystallized Fraction" map in AztecCrystal and gain valuable insights into your material's microstructure.

Joshua Depiver

To replicate the "Recrystallized fraction" map from Channel5 in AztecCrystal, follow these steps:

Understanding the Criteria

Deformed Grains: High internal strain, low orientation uniformity (e.g., GOS > 5°).

Substructured Grains: Intermediate internal strain (e.g., 2° < GOS ≤ 5°).

Recrystallized Grains: Low internal strain, high orientation uniformity (e.g., GOS < 2°).

Steps in AztecCrystal

Load EBSD Data:Open your EBSD data file in AztecCrystal.

Generate GOS Map:Navigate to the GOS map function under "Maps" or "Grain" analysis. Set thresholds for recrystallized, substructured, and deformed grains.

Classify Grains Using GOS:Use the "Classify" function to create a classification scheme based on GOS values.

Training the Classifier:Manually classify some regions to train the classifier.

Apply Classification:Apply the trained classification to the entire dataset.

Export the Map:Export the classified map to visualize the recrystallized fraction.

Practical Example

Load EBSD Data: Import your EBSD data into AztecCrystal.

Generate GOS Map: Configure GOS thresholds (e.g., 5° for deformed).

Classify: Use the Classify function to create and apply your scheme.

Training and Application: Train the classifier if needed and apply it to the dataset.

Export: Export the map for visualization.

By following these steps, you should be able to replicate the "Recrystallized fraction" map in AztecCrystal and analyze your EBSD data effectively.

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