The effect of distribution of second phase on dynamic damage
Abstract
For ductile metals, dynamic fracture occurs principally through void nucleation, growth, and coalescence at heterogeneities in the microstructure. Previous experimental research on high purity metals has shown that microstructural features, such as grain boundaries, inclusions, vacancies, and heterogeneities, can act as initial void nucleation sites. In addition, other research on two-phase materials has also highlighted the importance of the properties of a second phase itself in determining the dynamic response of the overall material. But, previous research has not investigated the effects of the distribution of a second phase on damage nucleation and evolution. To approach this problem in a systematic manner, two copper alloys with 1% lead materials, with the same Pb concentration but different Pb distributions, have been investigated. A new CuPb alloy was cast with a more homogeneous distribution of Pb as compared to a CuPb where the Pb congregated in large “stringer” type configurations. These materials were shock loaded at ~1.2 GPa and soft recovered. In-situ free surface velocity information, and post mortem metallography, reveals that even though the spall strength of both the materials were similar, the total extent and details of damage in the materials varied by 15%. This then suggests that altering themore »
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1411339
- Alternate Identifier(s):
- OSTI ID: 1328603
- Report Number(s):
- LA-UR-16-23605
Journal ID: ISSN 0021-8979; TRN: US1800209
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 120; Journal Issue: 8; Journal ID: ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Fensin, Saryu J., Jones, David R., Walker, Emily K., Farrow, Adam, Imhoff, Seth D., Clarke, Kester, Trujillo, Carl P., Martinez, Daniel T., Gray, George T., and Cerreta, Ellen K. The effect of distribution of second phase on dynamic damage. United States: N. p., 2016.
Web. doi:10.1063/1.4961041.
Fensin, Saryu J., Jones, David R., Walker, Emily K., Farrow, Adam, Imhoff, Seth D., Clarke, Kester, Trujillo, Carl P., Martinez, Daniel T., Gray, George T., & Cerreta, Ellen K. The effect of distribution of second phase on dynamic damage. United States. https://doi.org/10.1063/1.4961041
Fensin, Saryu J., Jones, David R., Walker, Emily K., Farrow, Adam, Imhoff, Seth D., Clarke, Kester, Trujillo, Carl P., Martinez, Daniel T., Gray, George T., and Cerreta, Ellen K. Sun .
"The effect of distribution of second phase on dynamic damage". United States. https://doi.org/10.1063/1.4961041. https://www.osti.gov/servlets/purl/1411339.
@article{osti_1411339,
title = {The effect of distribution of second phase on dynamic damage},
author = {Fensin, Saryu J. and Jones, David R. and Walker, Emily K. and Farrow, Adam and Imhoff, Seth D. and Clarke, Kester and Trujillo, Carl P. and Martinez, Daniel T. and Gray, George T. and Cerreta, Ellen K.},
abstractNote = {For ductile metals, dynamic fracture occurs principally through void nucleation, growth, and coalescence at heterogeneities in the microstructure. Previous experimental research on high purity metals has shown that microstructural features, such as grain boundaries, inclusions, vacancies, and heterogeneities, can act as initial void nucleation sites. In addition, other research on two-phase materials has also highlighted the importance of the properties of a second phase itself in determining the dynamic response of the overall material. But, previous research has not investigated the effects of the distribution of a second phase on damage nucleation and evolution. To approach this problem in a systematic manner, two copper alloys with 1% lead materials, with the same Pb concentration but different Pb distributions, have been investigated. A new CuPb alloy was cast with a more homogeneous distribution of Pb as compared to a CuPb where the Pb congregated in large “stringer” type configurations. These materials were shock loaded at ~1.2 GPa and soft recovered. In-situ free surface velocity information, and post mortem metallography, reveals that even though the spall strength of both the materials were similar, the total extent and details of damage in the materials varied by 15%. This then suggests that altering the distribution of Pb in the Cu matrix leads to the creation of more void nucleation sites and also changed the rate of void growth.},
doi = {10.1063/1.4961041},
journal = {Journal of Applied Physics},
number = 8,
volume = 120,
place = {United States},
year = {Sun Aug 28 00:00:00 EDT 2016},
month = {Sun Aug 28 00:00:00 EDT 2016}
}
Web of Science
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Works referencing / citing this record:
Shock wave propagation and spall failure of nanocrystalline Cu/Ta alloys: Effect of Ta in solid-solution
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Effect of peak stress and tensile strain-rate on spall in tantalum
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The void nucleation mechanism within lead phase during spallation of leaded brass
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