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

Journal Article · · Applied Physics Letters
DOI: https://doi.org/10.1063/1.4960796 · OSTI ID:1438742

Here, 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.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1438742
Report Number(s):
LLNL-JRNL--690544
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 9 Vol. 109; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (8)

Ultrafast shock synthesis of nanocarbon from a liquid precursor journal January 2020
Temperature and Pressure Dependences of the Elastic Properties of Tantalum Single Crystals Under <100> Tensile Loading: A Molecular Dynamics Study journal April 2018
Ultrafast shock synthesis of nanocarbon from a liquid precursor journal January 2020
A benchtop shock physics laboratory: Ultrafast laser driven shock spectroscopy and interferometry methods journal June 2019
Understanding and predicting damage and failure at grain boundaries in BCC Ta journal October 2019
Improved embedded-atom model potentials of Pb at high pressure: application to investigations of plasticity and phase transition under extreme conditions journal November 2018
Canonical dynamics: Equilibrium phase-space distributions journal March 1985
Temperature and Pressure Dependences of the Elastic Properties of Tantalum Single Crystals Under <100> Tensile Loading: A Molecular Dynamics Study journal April 2018

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