Measurements of stress fields near a grain boundary: Exploring blocked arrays of dislocations in 3D
Abstract
The interaction between dislocation pile-ups and grain boundaries gives rise to heterogeneous stress distributions when a structural metal is subjected to mechanical loading. Such stress heterogeneity leads to preferential sites for damage nucleation and therefore is intrinsically linked to the strength and ductility of polycrystalline metals. To date the majority of conclusions have been drawn from 2D experimental investigations at the sample surface, allowing only incomplete observations. Our purpose here is to significantly advance the understanding of such problems by providing quantitative measurements of the effects of dislocation pile up and grain boundary interactions in 3D. This is accomplished through the application of differential aperture X-ray Laue micro-diffraction (DAXM) and high angular resolution electron backscatter diffraction (HR-EBSD) techniques. Our analysis demonstrates a similar strain characterization capability between DAXM and HR-EBSD and the variation of stress intensity in 3D reveals that different parts of the same grain boundary may have different strengths in resisting slip transfer, likely due to the local grain boundary curvature.
- Authors:
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1392141
- Alternate Identifier(s):
- OSTI ID: 1196378
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Published Article
- Journal Name:
- Acta Materialia
- Additional Journal Information:
- Journal Name: Acta Materialia Journal Volume: 96 Journal Issue: C; Journal ID: ISSN 1359-6454
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; DAXM; HR-EBSD; slip band; grain boundary; hall-petch coefficient
Citation Formats
Guo, Y., Collins, D. M., Tarleton, E., Hofmann, F., Tischler, J., Liu, W., Xu, R., Wilkinson, A. J., and Britton, T. B. Measurements of stress fields near a grain boundary: Exploring blocked arrays of dislocations in 3D. United States: N. p., 2015.
Web. doi:10.1016/j.actamat.2015.05.041.
Guo, Y., Collins, D. M., Tarleton, E., Hofmann, F., Tischler, J., Liu, W., Xu, R., Wilkinson, A. J., & Britton, T. B. Measurements of stress fields near a grain boundary: Exploring blocked arrays of dislocations in 3D. United States. https://doi.org/10.1016/j.actamat.2015.05.041
Guo, Y., Collins, D. M., Tarleton, E., Hofmann, F., Tischler, J., Liu, W., Xu, R., Wilkinson, A. J., and Britton, T. B. Tue .
"Measurements of stress fields near a grain boundary: Exploring blocked arrays of dislocations in 3D". United States. https://doi.org/10.1016/j.actamat.2015.05.041.
@article{osti_1392141,
title = {Measurements of stress fields near a grain boundary: Exploring blocked arrays of dislocations in 3D},
author = {Guo, Y. and Collins, D. M. and Tarleton, E. and Hofmann, F. and Tischler, J. and Liu, W. and Xu, R. and Wilkinson, A. J. and Britton, T. B.},
abstractNote = {The interaction between dislocation pile-ups and grain boundaries gives rise to heterogeneous stress distributions when a structural metal is subjected to mechanical loading. Such stress heterogeneity leads to preferential sites for damage nucleation and therefore is intrinsically linked to the strength and ductility of polycrystalline metals. To date the majority of conclusions have been drawn from 2D experimental investigations at the sample surface, allowing only incomplete observations. Our purpose here is to significantly advance the understanding of such problems by providing quantitative measurements of the effects of dislocation pile up and grain boundary interactions in 3D. This is accomplished through the application of differential aperture X-ray Laue micro-diffraction (DAXM) and high angular resolution electron backscatter diffraction (HR-EBSD) techniques. Our analysis demonstrates a similar strain characterization capability between DAXM and HR-EBSD and the variation of stress intensity in 3D reveals that different parts of the same grain boundary may have different strengths in resisting slip transfer, likely due to the local grain boundary curvature.},
doi = {10.1016/j.actamat.2015.05.041},
journal = {Acta Materialia},
number = C,
volume = 96,
place = {United States},
year = {Tue Sep 01 00:00:00 EDT 2015},
month = {Tue Sep 01 00:00:00 EDT 2015}
}
https://doi.org/10.1016/j.actamat.2015.05.041
Web of Science
Figures / Tables:
Works referencing / citing this record:
Crystal Indentation Hardness
journal, January 2017
- Armstrong, Ronald; Walley, Stephen; Elban, Wayne
- Crystals, Vol. 7, Issue 1
Interaction of dislocation pile-up with a low-angle tilt boundary: a discrete dislocation dynamics study
journal, December 2016
- Kapoor, Rajeev; Verdhan, Naisheel
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Alignment of sample position and rotation during in situ synchrotron X-ray micro-diffraction experiments using a Laue cross-correlation approach
journal, September 2019
- Zhang, Chenglu; Zhang, Yubin; Wu, Guilin
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Intragranular three-dimensional stress tensor fields in plastically deformed polycrystals
journal, December 2019
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Short-wavelength free-electron laser sources and science: a review
text, January 2017
- Seddon, E. A.; Clarke, J. A.; Dunning, D. J.
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Figures / Tables found in this record: