exCaking for Polycrystal Diffraction Strain Analysis

Dependencies

• MATLAB R2022a

Installation

Download 'calibration.p', 'reference.p' and 'analyse.p' to your project folder.

/myProjectFolder$

exCaking Command Line

calibration(peak_range, set_brightness, sub_pixel, file_format)

• peak_range - Pixelwise ring peak fitting range of calibration file
• set_brightness - Brightness of calibration file ranging from 0.0 to 1.0
• sub_pixel - Step size for sub-pixel level analysis of calibration file
• file_format - File format of calibration file

reference(peak_range, set_brightness, sub_pixel, file_format)

• peak_range - Pixelwise ring peak fitting range of polycrystal diffraction data
• set_brightness - Brightness of reference file ranging from 0.0 to 1.0
• sub_pixel - Step size for sub-pixel level analysis of polycrystal diffraction data
• file_format - File format of polycrystal diffraction data

analyse(n_of_workers, ang_step_size)

• n_of_workers - Number of parallel processes
• ang_step_size - Angular step size within the range of 360 degrees

exCaking Input Files

Follow the instructions from command window.

Usage

The guide for analysing polycrystal diffraction data:

https://github.com/fatihxuzun/exCaking/blob/main/tutorial.pdf

Outputs

/myProjectFolder/dStore$

• circle_calibration.mat

• circle_calibration_selected_points.png

• circle_calibration_fit_line.png

• circle_calibration_fit_peaks_start.png

• circle_calibration_fit_peaks_end.png

• multipeak_reference.mat

• multipeak_reference.png

• multipeak_reference_peaks_start.png

• multipeak_reference_peaks_end.png

• myDataFolder_exCaking.csv

Scientific Usage

The exCaking console application was developed to improve strain analysis in polycrystalline materials by offering a more accurate approach to processing diffraction data from Debye-Scherrer rings, enhancing the precision of elastic strain measurements. Please cite:

Uzun, F., Daisenberger, D., Liogas, K., Wang, Z.I., Chen, J., Besnard, C., Korsunsky, A.M. Extended Caking Method for Strain Analysis of Polycrystalline Diffraction Debye–Scherrer Rings. Crystals (2024). https://doi.org/10.3390/cryst14080716

Publications

Uzun, F., Korsunsky, A.M. Eigenstrain Tomography: Full-Field Residual Stress Reconstruction via Polycrystalline Diffraction Projections. Acta Materialia (2025). https://doi.org/10.1016/j.actamat.2025.121872

Uzun, F., Slim, M.F., Basoalto, H. et al. Application of strain tomography and contour method to residual stress analysis in additively manufactured CM247LC superalloy parts. Prog Addit Manuf (2025). https://doi.org/10.1007/s40964-025-01116-2

Uzun, F., Besnard, C., Vaughan, G. et al. A Critical Evaluation of Diffraction Strain Tomography and Contour Method by Assessing Residual Elastic Strains and Quench-Induced Cracking in a Carbon Steel Bar. Met. Mater. Int. (2025). https://doi.org/10.1007/s12540-025-01976-x