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Title: Correlations Between Spall Damage Mode Preference and Microstructure in Shocked Polycrystalline Copper: A 3-D X-Ray Tomography Study

Abstract

Nondestructive characterization techniques are essential for maximizing the amount of high fidelity data obtained from post mortem mechanically tested materials, particularly for the complex experimental techniques used for shock loading. Polycrystalline copper samples of varying thermomechanical histories were shock loaded to induce incipient spall damage conditions via plate impacts at low pressures. Electron backscattering diffraction (EBSD) and 3-D X-ray tomography (XRT) were utilized to obtain microstructural and void volume data, respectively. Voids were fit to ellipsoids using their inertia tensors obtained from the 3-D XRT data, and the results compared to EBSD data. This, in turn, enabled establishing quantitative correlations between void shapes and preferential damage mode, either inter- or trans-granular, for each thermomechanical history. Greater than 60 % of voids present in heat-treated samples were spherical, indicative of transgranular damage preference. Greater than 90 % of voids present in as-received rolled samples were flat sheetlike voids or unsymmetrical oblate ellipsoids, indicative of intergranular and coalesced damage modes. Analyzing grain boundary damage statistics in conjunction with global damage mode distributions indicate that boundaries become less dominant as preferential void nucleation sites within the spall plane as the bulk strength of the material decreases from heat treatments.

Authors:
 [1];  [2];  [2];  [3];  [4];  [4];  [4];  [5]
+ Show Author Affiliations
  1. Arizona State Univ., Tempe, AZ (United States). Ira A. Fulton Schools of Engineering; Univ. of New South Wales, Sydney, NSW (Australia)
  2. Arizona State Univ., Tempe, AZ (United States). Ira A. Fulton Schools of Engineering
  3. Peac Inst. of Multiscale Sciences, Chengdu (China)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Arizona State Univ., Tempe, AZ (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1460716
Report Number(s):
DOE-ASU-02005-3
Journal ID: ISSN 2199-7446; PII: 34; TRN: US1901908
Grant/Contract Number:  
NA0002005; FG52-06NA26169; FG52-10NA29653
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Dynamic Behavior of Materials
Additional Journal Information:
Journal Volume: 1; Journal Issue: 4; Journal ID: ISSN 2199-7446
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Spall; void shape; statistics; damage mode; intergranular; transgranular; Shock loading; X-ray tomography; Microstructure; Copper

Citation Formats

Brown, A. D., Pham, Q., Peralta, P., Luo, S. N., Patterson, B. M., Byler, D., Koskelo, A., and Xiao, X.. Correlations Between Spall Damage Mode Preference and Microstructure in Shocked Polycrystalline Copper: A 3-D X-Ray Tomography Study. United States: N. p., 2015. Web. doi:10.1007/s40870-015-0034-2.
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Brown, A. D., Pham, Q., Peralta, P., Luo, S. N., Patterson, B. M., Byler, D., Koskelo, A., & Xiao, X.. Correlations Between Spall Damage Mode Preference and Microstructure in Shocked Polycrystalline Copper: A 3-D X-Ray Tomography Study. United States. https://doi.org/10.1007/s40870-015-0034-2
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Brown, A. D., Pham, Q., Peralta, P., Luo, S. N., Patterson, B. M., Byler, D., Koskelo, A., and Xiao, X.. Wed . "Correlations Between Spall Damage Mode Preference and Microstructure in Shocked Polycrystalline Copper: A 3-D X-Ray Tomography Study". United States. https://doi.org/10.1007/s40870-015-0034-2. https://www.osti.gov/servlets/purl/1460716.
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@article{osti_1460716,
title = {Correlations Between Spall Damage Mode Preference and Microstructure in Shocked Polycrystalline Copper: A 3-D X-Ray Tomography Study},
author = {Brown, A. D. and Pham, Q. and Peralta, P. and Luo, S. N. and Patterson, B. M. and Byler, D. and Koskelo, A. and Xiao, X.},
abstractNote = {Nondestructive characterization techniques are essential for maximizing the amount of high fidelity data obtained from post mortem mechanically tested materials, particularly for the complex experimental techniques used for shock loading. Polycrystalline copper samples of varying thermomechanical histories were shock loaded to induce incipient spall damage conditions via plate impacts at low pressures. Electron backscattering diffraction (EBSD) and 3-D X-ray tomography (XRT) were utilized to obtain microstructural and void volume data, respectively. Voids were fit to ellipsoids using their inertia tensors obtained from the 3-D XRT data, and the results compared to EBSD data. This, in turn, enabled establishing quantitative correlations between void shapes and preferential damage mode, either inter- or trans-granular, for each thermomechanical history. Greater than 60 % of voids present in heat-treated samples were spherical, indicative of transgranular damage preference. Greater than 90 % of voids present in as-received rolled samples were flat sheetlike voids or unsymmetrical oblate ellipsoids, indicative of intergranular and coalesced damage modes. Analyzing grain boundary damage statistics in conjunction with global damage mode distributions indicate that boundaries become less dominant as preferential void nucleation sites within the spall plane as the bulk strength of the material decreases from heat treatments.},
doi = {10.1007/s40870-015-0034-2},
journal = {Journal of Dynamic Behavior of Materials},
number = 4,
volume = 1,
place = {United States},
year = {2015},
month = {10}
}
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https://doi.org/10.1007/s40870-015-0034-2
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