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Title: Why are some Interfaces in Materials Stronger than others?

Abstract

Grain boundaries (GBs) are often the preferred sites for void nucleation in ductile metals. However, it has been observed that all boundaries do not contribute equally to this process. We present a mechanistic rationale for the role of GBs in damage nucleation in copper, along with a quantitative map for predicting preferred void nucleation at GBs based on molecular dynamics simulations in copper. Simulations show a direct correlation between the void nucleation stress and the ability of a grain boundary to plastically deform by emitting dislocations, during shock compression. Plastic response of a GB, affects the development of stress concentrations believed to be responsible for void nucleation by acting as a dissipation mechanism for the applied stress.

Authors:
 [1];  [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1321741
Report Number(s):
LA-UR-14-23562
Journal ID: ISSN 2045-2322
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 4; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Grain boundary, void nucleation, shock loading

Citation Formats

Fensin, Saryu J., Cerreta, Ellen K., Gray, George T., and Valone, Steven M. Why are some Interfaces in Materials Stronger than others?. United States: N. p., 2014. Web. doi:10.1038/srep05461.
Fensin, Saryu J., Cerreta, Ellen K., Gray, George T., & Valone, Steven M. Why are some Interfaces in Materials Stronger than others?. United States. https://doi.org/10.1038/srep05461
Fensin, Saryu J., Cerreta, Ellen K., Gray, George T., and Valone, Steven M. Thu . "Why are some Interfaces in Materials Stronger than others?". United States. https://doi.org/10.1038/srep05461. https://www.osti.gov/servlets/purl/1321741.
@article{osti_1321741,
title = {Why are some Interfaces in Materials Stronger than others?},
author = {Fensin, Saryu J. and Cerreta, Ellen K. and Gray, George T. and Valone, Steven M.},
abstractNote = {Grain boundaries (GBs) are often the preferred sites for void nucleation in ductile metals. However, it has been observed that all boundaries do not contribute equally to this process. We present a mechanistic rationale for the role of GBs in damage nucleation in copper, along with a quantitative map for predicting preferred void nucleation at GBs based on molecular dynamics simulations in copper. Simulations show a direct correlation between the void nucleation stress and the ability of a grain boundary to plastically deform by emitting dislocations, during shock compression. Plastic response of a GB, affects the development of stress concentrations believed to be responsible for void nucleation by acting as a dissipation mechanism for the applied stress.},
doi = {10.1038/srep05461},
journal = {Scientific Reports},
number = ,
volume = 4,
place = {United States},
year = {Thu Jun 26 00:00:00 EDT 2014},
month = {Thu Jun 26 00:00:00 EDT 2014}
}

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Cited by: 44 works
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Works referencing / citing this record:

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