Fatigue short-cracks in Mg alloys display complex growth behavior due to high plastic anisotropy and crack path dependence on local microstructural features. In this study, the three-dimensional crystallography of short-crack paths in Mg alloy WE43 was characterized by mapping near-field high-energy X-ray diffraction microscopy (HEDM) reconstructed grain maps to high-resolution X-ray CT reconstructions of the fracture surfaces in the crack initiation and short-crack growth regions of six ultrasonic fatigue specimens. Crack–grain–boundary intersections were analyzed at 81 locations across the six crack paths. The basal intragranular, non-basal intragranular, or intergranular character of short-crack growth following each boundary intersection was correlated to crystallographic and geometric parameters of the trailing and leading grains, three-dimensional grain boundary plane, and advancing crack front. The results indicate that crack paths are dependent on the combined crystallographic and geometric character of the local microstructure, and crack path prediction can be improved by use of dimensionality reduction on subsets of high-linear-correlation microstructural parameters.
Greeley, Duncan A., et al. "Quantitative analysis of three-dimensional fatigue crack path selection in Mg alloy WE43 using high-energy X-ray diffraction microscopy." Fatigue and Fracture of Engineering Materials and Structures, vol. 47, no. 4, Jan. 2024. https://doi.org/10.1111/ffe.14217
Greeley, Duncan A., Adams, Jacob F., Kenesei, Peter, Spear, Ashley D., & Allison, John E. (2024). Quantitative analysis of three-dimensional fatigue crack path selection in Mg alloy WE43 using high-energy X-ray diffraction microscopy. Fatigue and Fracture of Engineering Materials and Structures, 47(4). https://doi.org/10.1111/ffe.14217
Greeley, Duncan A., Adams, Jacob F., Kenesei, Peter, et al., "Quantitative analysis of three-dimensional fatigue crack path selection in Mg alloy WE43 using high-energy X-ray diffraction microscopy," Fatigue and Fracture of Engineering Materials and Structures 47, no. 4 (2024), https://doi.org/10.1111/ffe.14217
@article{osti_2558084,
author = {Greeley, Duncan A. and Adams, Jacob F. and Kenesei, Peter and Spear, Ashley D. and Allison, John E.},
title = {Quantitative analysis of three-dimensional fatigue crack path selection in Mg alloy WE43 using high-energy X-ray diffraction microscopy},
annote = {Fatigue short-cracks in Mg alloys display complex growth behavior due to high plastic anisotropy and crack path dependence on local microstructural features. In this study, the three-dimensional crystallography of short-crack paths in Mg alloy WE43 was characterized by mapping near-field high-energy X-ray diffraction microscopy (HEDM) reconstructed grain maps to high-resolution X-ray CT reconstructions of the fracture surfaces in the crack initiation and short-crack growth regions of six ultrasonic fatigue specimens. Crack–grain–boundary intersections were analyzed at 81 locations across the six crack paths. The basal intragranular, non-basal intragranular, or intergranular character of short-crack growth following each boundary intersection was correlated to crystallographic and geometric parameters of the trailing and leading grains, three-dimensional grain boundary plane, and advancing crack front. The results indicate that crack paths are dependent on the combined crystallographic and geometric character of the local microstructure, and crack path prediction can be improved by use of dimensionality reduction on subsets of high-linear-correlation microstructural parameters.},
doi = {10.1111/ffe.14217},
url = {https://www.osti.gov/biblio/2558084},
journal = {Fatigue and Fracture of Engineering Materials and Structures},
issn = {ISSN 8756-758X},
number = {4},
volume = {47},
place = {United States},
publisher = {Wiley},
year = {2024},
month = {01}}
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357; SC0008637
OSTI ID:
2558084
Journal Information:
Fatigue and Fracture of Engineering Materials and Structures, Journal Name: Fatigue and Fracture of Engineering Materials and Structures Journal Issue: 4 Vol. 47; ISSN 8756-758X