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Title: Anisotropic shock response of single-crystalline β-phase tin shock physics, molecular dynamics, plasticity

Abstract

Mesoscale simulations of the dynamic response of polycrystalline metals to shockwave compression can provide unique insight in to the nature of the various physical mechanisms responsible for material failure. This approach requires a constitutive description for individual grains and boundaries, including defects such as dislocations, within an explicit representation of the microstructure geometry and evolving deformation fields. Computational models of the single-crystal constituents cannot be unambiguously constrained by traditional measurements of the shock or stress-strain response of polycrystalline metals. Instead, these models require comprehensive measurements of the anisotropic shock response of single crystals for their calibration and validation. We present a coordinated experimental and simulation campaign on the shock response of single-crystalline β-phase tin demonstrating a remarkable anisotropic elastic-plastic response of the metal. This anisotropy will be explained with the help of molecular dynamics simulations that show preferred twinning in one orientation.

Authors:
 [1];  [2];  [2];  [2];  [3];  [3]
  1. Nevada National Security Site, New Mexico Operations, Mission Support and Test Services LLC
  2. Nevada National Security Site, Special Technologies Laboratory, Mission Support and Test Services LLC
  3. Los Alamos National Laboratory, Los Alamos, New Mexico
Publication Date:
Research Org.:
Nevada National Security Site/Mission Support and Test Services LLC
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Programs (DP) (NA-10)
OSTI Identifier:
1528964
Report Number(s):
DOE/NV/03624-0532
DOE Contract Number:  
DE-NA0003624
Resource Type:
Conference
Resource Relation:
Conference: 21st Biennial Conference of the APS Topical Group on Shock Compression of Condensed Matter, Portland, Oregon, USA, June 16 – 21, 2019.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; dynamic response, polycrystalline metals, shockwave compression, grains, boundaries, defects, anisotropic shock, molecular dynamics

Citation Formats

Scharff, R. J., Stevens, G. D., La Lone, B. M., Turley, W. D., Fensin, S. J., and Luscher, D. J. Anisotropic shock response of single-crystalline β-phase tin shock physics, molecular dynamics, plasticity. United States: N. p., 2019. Web.
Scharff, R. J., Stevens, G. D., La Lone, B. M., Turley, W. D., Fensin, S. J., & Luscher, D. J. Anisotropic shock response of single-crystalline β-phase tin shock physics, molecular dynamics, plasticity. United States.
Scharff, R. J., Stevens, G. D., La Lone, B. M., Turley, W. D., Fensin, S. J., and Luscher, D. J. Fri . "Anisotropic shock response of single-crystalline β-phase tin shock physics, molecular dynamics, plasticity". United States. https://www.osti.gov/servlets/purl/1528964.
@article{osti_1528964,
title = {Anisotropic shock response of single-crystalline β-phase tin shock physics, molecular dynamics, plasticity},
author = {Scharff, R. J. and Stevens, G. D. and La Lone, B. M. and Turley, W. D. and Fensin, S. J. and Luscher, D. J.},
abstractNote = {Mesoscale simulations of the dynamic response of polycrystalline metals to shockwave compression can provide unique insight in to the nature of the various physical mechanisms responsible for material failure. This approach requires a constitutive description for individual grains and boundaries, including defects such as dislocations, within an explicit representation of the microstructure geometry and evolving deformation fields. Computational models of the single-crystal constituents cannot be unambiguously constrained by traditional measurements of the shock or stress-strain response of polycrystalline metals. Instead, these models require comprehensive measurements of the anisotropic shock response of single crystals for their calibration and validation. We present a coordinated experimental and simulation campaign on the shock response of single-crystalline β-phase tin demonstrating a remarkable anisotropic elastic-plastic response of the metal. This anisotropy will be explained with the help of molecular dynamics simulations that show preferred twinning in one orientation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {6}
}

Conference:
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