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Title: Yielding of tantalum at strain rates up to 109 s–1

Abstract

We have used a 45 μJ laser pulse to accelerate the free surface of fine-grained tantalum films up to peak velocities of ∼1.2 km s−1. The films had thicknesses of ∼1–2 μm and in-plane grain widths of ∼75–150 nm. Using ultrafast interferometry, we have measured the time history of the velocity of the surface at different spatial positions across the accelerated region. The initial part of the histories (assumed to correspond to the “elastic precursor” observed previously) exhibited measured strain rates of ∼0.6 to ∼3.2 × 109 s−1 and stresses of ∼4 to ∼22 GPa. Importantly, we find that elastic amplitudes exhibit little variation with strain rate for a constant peak surface velocity, even though, via covariation of the strain rate with peak surface velocity, they vary with strain rate. Furthermore, by comparison with data obtained at lower strain rates, we find that amplitudes are much better predicted by peak velocities rather than by either strain rate or sample thickness.

Authors:
 [1];  [1];  [1]; ORCiD logo [1];  [1];  [1]
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1438742
Alternate Identifier(s):
OSTI ID: 1420659
Report Number(s):
LLNL-JRNL-690544
Journal ID: ISSN 0003-6951; TRN: US1900509
Grant/Contract Number:  
AC52-07NA27344; 12ERD042
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 109; Journal Issue: 9; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Crowhurst, Jonathan C., Armstrong, Michael R., Gates, Sean D., Zaug, Joseph M., Radousky, Harry B., and Teslich, Nick E. Yielding of tantalum at strain rates up to 109 s–1. United States: N. p., 2016. Web. doi:10.1063/1.4960796.
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Crowhurst, Jonathan C., Armstrong, Michael R., Gates, Sean D., Zaug, Joseph M., Radousky, Harry B., & Teslich, Nick E. Yielding of tantalum at strain rates up to 109 s–1. United States. https://doi.org/10.1063/1.4960796
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Crowhurst, Jonathan C., Armstrong, Michael R., Gates, Sean D., Zaug, Joseph M., Radousky, Harry B., and Teslich, Nick E. Mon . "Yielding of tantalum at strain rates up to 109 s–1". United States. https://doi.org/10.1063/1.4960796. https://www.osti.gov/servlets/purl/1438742.
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@article{osti_1438742,
title = {Yielding of tantalum at strain rates up to 109 s–1},
author = {Crowhurst, Jonathan C. and Armstrong, Michael R. and Gates, Sean D. and Zaug, Joseph M. and Radousky, Harry B. and Teslich, Nick E.},
abstractNote = {We have used a 45 μJ laser pulse to accelerate the free surface of fine-grained tantalum films up to peak velocities of ∼1.2 km s−1. The films had thicknesses of ∼1–2 μm and in-plane grain widths of ∼75–150 nm. Using ultrafast interferometry, we have measured the time history of the velocity of the surface at different spatial positions across the accelerated region. The initial part of the histories (assumed to correspond to the “elastic precursor” observed previously) exhibited measured strain rates of ∼0.6 to ∼3.2 × 109 s−1 and stresses of ∼4 to ∼22 GPa. Importantly, we find that elastic amplitudes exhibit little variation with strain rate for a constant peak surface velocity, even though, via covariation of the strain rate with peak surface velocity, they vary with strain rate. Furthermore, by comparison with data obtained at lower strain rates, we find that amplitudes are much better predicted by peak velocities rather than by either strain rate or sample thickness.},
doi = {10.1063/1.4960796},
journal = {Applied Physics Letters},
number = 9,
volume = 109,
place = {United States},
year = {Mon Aug 29 00:00:00 EDT 2016},
month = {Mon Aug 29 00:00:00 EDT 2016}
}
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https://doi.org/10.1063/1.4960796
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    Works referencing / citing this record:

    Ultrafast shock synthesis of nanocarbon from a liquid precursor
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    • Nature Communications, Vol. 11, Issue 1
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    A benchtop shock physics laboratory: Ultrafast laser driven shock spectroscopy and interferometry methods
    journal, June 2019

    • Powell, M. S.; Bowlan, P. R.; Son, S. F.
    • Review of Scientific Instruments, Vol. 90, Issue 6
    • DOI: 10.1063/1.5092244

    Understanding and predicting damage and failure at grain boundaries in BCC Ta
    journal, October 2019

    • Chen, J.; Hahn, E. N.; Dongare, A. M.
    • Journal of Applied Physics, Vol. 126, Issue 16
    • DOI: 10.1063/1.5111837

    Improved embedded-atom model potentials of Pb at high pressure: application to investigations of plasticity and phase transition under extreme conditions
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    • Wang, Kun; Zhu, Wenjun; Xiang, Meizhen
    • Modelling and Simulation in Materials Science and Engineering, Vol. 27, Issue 1
    • DOI: 10.1088/1361-651x/aaea55

    Canonical dynamics: Equilibrium phase-space distributions
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    Ultrafast shock synthesis of nanocarbon from a liquid precursor
    journal, January 2020

    • Armstrong, Michael R.; Lindsey, Rebecca K.; Goldman, Nir
    • Nature Communications, Vol. 11, Issue 1
    • DOI: 10.1038/s41467-019-14034-z
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