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Title: Void growth by dislocation adsorption

Abstract

Here, we propose a dislocation adsorption-based mechanism for void growth in metals, wherein a void grows as dislocations from the bulk annihilate at its surface. The basic process is governed by glide and cross-slip of dislocations at the surface of a void. Using molecular dynamics simulations we show that when dislocations are present around a void, growth occurs more quickly and at much lower stresses than when the crystal is initially dislocation-free. Finally, we show that adsorption-mediated growth predicts an exponential dependence on the hydrostatic stress, consistent with the well-known Rice-Tracey equation.

Authors:
 [1];  [2]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States); Rutgers Univ., Piscataway, NJ (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1595028
Report Number(s):
SAND-2019-14959J
Journal ID: ISSN 2166-3831; 682315
Grant/Contract Number:  
AC04-94AL85000; NA0003525
Resource Type:
Accepted Manuscript
Journal Name:
Materials Research Letters
Additional Journal Information:
Journal Volume: 8; Journal Issue: 3; Journal ID: ISSN 2166-3831
Publisher:
Taylor and Francis
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; void; dislocation; plasticity; rupture

Citation Formats

Sills, Ryan B., and Boyce, B. L. Void growth by dislocation adsorption. United States: N. p., 2019. Web. doi:10.1080/21663831.2019.1702114.
Sills, Ryan B., & Boyce, B. L. Void growth by dislocation adsorption. United States. https://doi.org/10.1080/21663831.2019.1702114
Sills, Ryan B., and Boyce, B. L. Thu . "Void growth by dislocation adsorption". United States. https://doi.org/10.1080/21663831.2019.1702114. https://www.osti.gov/servlets/purl/1595028.
@article{osti_1595028,
title = {Void growth by dislocation adsorption},
author = {Sills, Ryan B. and Boyce, B. L.},
abstractNote = {Here, we propose a dislocation adsorption-based mechanism for void growth in metals, wherein a void grows as dislocations from the bulk annihilate at its surface. The basic process is governed by glide and cross-slip of dislocations at the surface of a void. Using molecular dynamics simulations we show that when dislocations are present around a void, growth occurs more quickly and at much lower stresses than when the crystal is initially dislocation-free. Finally, we show that adsorption-mediated growth predicts an exponential dependence on the hydrostatic stress, consistent with the well-known Rice-Tracey equation.},
doi = {10.1080/21663831.2019.1702114},
journal = {Materials Research Letters},
number = 3,
volume = 8,
place = {United States},
year = {Thu Dec 19 00:00:00 EST 2019},
month = {Thu Dec 19 00:00:00 EST 2019}
}

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Cited by: 26 works
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