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Title: 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 » distribution of Pb in the Cu matrix leads to the creation of more void nucleation sites and also changed the rate of void growth.« less

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1];  [1]
  1. 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:
Journal Article: 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. 2016. "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},
url = {https://www.osti.gov/biblio/1411339}, journal = {Journal of Applied Physics},
issn = {0021-8979},
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}
}

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Cited by: 15 works
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Works referenced in this record:

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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
journal, December 2017


Effect of peak stress and tensile strain-rate on spall in tantalum
journal, August 2018


The void nucleation mechanism within lead phase during spallation of leaded brass
journal, April 2018