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Title: Physically-based strength model of tantalum incorporating effects of temperature, strain rate and pressure

Abstract

In this work, we develop a tantalum strength model that incorporates e ects of temperature, strain rate and pressure. Dislocation kink-pair theory is used to incorporate temperature and strain rate e ects while the pressure dependent yield is obtained through the pressure dependent shear modulus. Material constants used in the model are parameterized from tantalum single crystal tests and polycrystalline ramp compression experiments. It is shown that the proposed strength model agrees well with the temperature and strain rate dependent yield obtained from polycrystalline tantalum experiments. Furthermore, the model accurately reproduces the pressure dependent yield stresses up to 250 GPa. The proposed strength model is then used to conduct simulations of a Taylor cylinder impact test and validated with experiments. This approach provides a physically-based multi-scale strength model that is able to predict the plastic deformation of polycrystalline tantalum through a wide range of temperature, strain and pressure regimes.

Authors:
 [1];  [1];  [1];  [2]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Drexel Univ., Philadelphia, PA (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:
1259532
Report Number(s):
SAND-2015-9807J
Journal ID: ISSN 0965-0393; 607815
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Modelling and Simulation in Materials Science and Engineering
Additional Journal Information:
Journal Volume: 24; Journal Issue: 5; Journal ID: ISSN 0965-0393
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Tantalum; strain rate; temperature; pressure; dynamic simulations; kink-pair theory

Citation Formats

Lim, Hojun, Battaile, Corbett C., Brown, Justin L., and Weinberger, Christopher R.. Physically-based strength model of tantalum incorporating effects of temperature, strain rate and pressure. United States: N. p., 2016. Web. https://doi.org/10.1088/0965-0393/24/5/055018.
Lim, Hojun, Battaile, Corbett C., Brown, Justin L., & Weinberger, Christopher R.. Physically-based strength model of tantalum incorporating effects of temperature, strain rate and pressure. United States. https://doi.org/10.1088/0965-0393/24/5/055018
Lim, Hojun, Battaile, Corbett C., Brown, Justin L., and Weinberger, Christopher R.. Tue . "Physically-based strength model of tantalum incorporating effects of temperature, strain rate and pressure". United States. https://doi.org/10.1088/0965-0393/24/5/055018. https://www.osti.gov/servlets/purl/1259532.
@article{osti_1259532,
title = {Physically-based strength model of tantalum incorporating effects of temperature, strain rate and pressure},
author = {Lim, Hojun and Battaile, Corbett C. and Brown, Justin L. and Weinberger, Christopher R.},
abstractNote = {In this work, we develop a tantalum strength model that incorporates e ects of temperature, strain rate and pressure. Dislocation kink-pair theory is used to incorporate temperature and strain rate e ects while the pressure dependent yield is obtained through the pressure dependent shear modulus. Material constants used in the model are parameterized from tantalum single crystal tests and polycrystalline ramp compression experiments. It is shown that the proposed strength model agrees well with the temperature and strain rate dependent yield obtained from polycrystalline tantalum experiments. Furthermore, the model accurately reproduces the pressure dependent yield stresses up to 250 GPa. The proposed strength model is then used to conduct simulations of a Taylor cylinder impact test and validated with experiments. This approach provides a physically-based multi-scale strength model that is able to predict the plastic deformation of polycrystalline tantalum through a wide range of temperature, strain and pressure regimes.},
doi = {10.1088/0965-0393/24/5/055018},
journal = {Modelling and Simulation in Materials Science and Engineering},
number = 5,
volume = 24,
place = {United States},
year = {2016},
month = {6}
}

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Cited by: 2 works
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    Works referencing / citing this record:

    Tantalum strength at extreme strain rates from impact-driven Richtmyer-Meshkov instabilities
    journal, November 2019