Abstract
Three-dimensional X-ray tomography (XRT) provides a non-destructive technique to determine the location, size, and shape of spall damage within shock loaded metals. Polycrystalline copper samples of varying thermomechanical histories were shocked via plate impacts at low pressures to ensure incipient spall conditions. Additionally, samples of similar heat-treated microstructures were impacted at various loading rates. All 3D XRT volumetric void data underwent smoothing, thresholding, and volumetric sieves. The full inertia tensor was found for each void, which was used to create best fit ellipsoids correlating shape to damage modes. Density distributions were plotted for the best-fit ellipsoid semi-axes aspect ratios alc and blc, where, a≤b≤c. It was found that >60% of voids in heat-treated samples resembled transgranular damage, whereas >70% of voids in the rolled sample resembled intergranular damage. Preliminary analysis also clearly indicates an increase of void coalescence with decreasing tensile loading stress rates for impacted samples of similar microstructures.
| Original language | English (US) |
|---|---|
| Title of host publication | Characterization of Minerals, Metals, and Materials 2016 |
| Publisher | Springer International Publishing |
| Pages | 57-64 |
| Number of pages | 8 |
| ISBN (Electronic) | 9783319482101 |
| ISBN (Print) | 9781119264392 |
| DOIs | |
| State | Published - Jan 1 2016 |
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Keywords
- Copper
- Microstructure
- Shock loading
- Spall
- X-ray tomography
ASJC Scopus subject areas
- Engineering(all)
- Materials Science(all)
Cite this
Methodology for determining spall damage mode preference in shocked FCC polycrystalline metals from 3D X-Ray tomography data. / Brown, A. D.; Pham, Q.; Peralta, Pedro; Patterson, B. M.; Escobedo-Diaz, J. P.; Luo, S. N.; Dennis-Koller, D.; Cerreta, E. K.; Byler, D.; Koskelo, A.; Xiao, X.
Characterization of Minerals, Metals, and Materials 2016. Springer International Publishing, 2016. p. 57-64.Research output: Chapter in Book/Report/Conference proceeding › Chapter
}
TY - CHAP
T1 - Methodology for determining spall damage mode preference in shocked FCC polycrystalline metals from 3D X-Ray tomography data
AU - Brown, A. D.
AU - Pham, Q.
AU - Peralta, Pedro
AU - Patterson, B. M.
AU - Escobedo-Diaz, J. P.
AU - Luo, S. N.
AU - Dennis-Koller, D.
AU - Cerreta, E. K.
AU - Byler, D.
AU - Koskelo, A.
AU - Xiao, X.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Three-dimensional X-ray tomography (XRT) provides a non-destructive technique to determine the location, size, and shape of spall damage within shock loaded metals. Polycrystalline copper samples of varying thermomechanical histories were shocked via plate impacts at low pressures to ensure incipient spall conditions. Additionally, samples of similar heat-treated microstructures were impacted at various loading rates. All 3D XRT volumetric void data underwent smoothing, thresholding, and volumetric sieves. The full inertia tensor was found for each void, which was used to create best fit ellipsoids correlating shape to damage modes. Density distributions were plotted for the best-fit ellipsoid semi-axes aspect ratios alc and blc, where, a≤b≤c. It was found that >60% of voids in heat-treated samples resembled transgranular damage, whereas >70% of voids in the rolled sample resembled intergranular damage. Preliminary analysis also clearly indicates an increase of void coalescence with decreasing tensile loading stress rates for impacted samples of similar microstructures.
AB - Three-dimensional X-ray tomography (XRT) provides a non-destructive technique to determine the location, size, and shape of spall damage within shock loaded metals. Polycrystalline copper samples of varying thermomechanical histories were shocked via plate impacts at low pressures to ensure incipient spall conditions. Additionally, samples of similar heat-treated microstructures were impacted at various loading rates. All 3D XRT volumetric void data underwent smoothing, thresholding, and volumetric sieves. The full inertia tensor was found for each void, which was used to create best fit ellipsoids correlating shape to damage modes. Density distributions were plotted for the best-fit ellipsoid semi-axes aspect ratios alc and blc, where, a≤b≤c. It was found that >60% of voids in heat-treated samples resembled transgranular damage, whereas >70% of voids in the rolled sample resembled intergranular damage. Preliminary analysis also clearly indicates an increase of void coalescence with decreasing tensile loading stress rates for impacted samples of similar microstructures.
KW - Copper
KW - Microstructure
KW - Shock loading
KW - Spall
KW - X-ray tomography
UR - http://www.scopus.com/inward/record.url?scp=85015155840&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85015155840&partnerID=8YFLogxK
U2 - 10.1007/978-3-319-48210-1_7
DO - 10.1007/978-3-319-48210-1_7
M3 - Chapter
AN - SCOPUS:85015155840
SN - 9781119264392
SP - 57
EP - 64
BT - Characterization of Minerals, Metals, and Materials 2016
PB - Springer International Publishing
ER -