Unusual plasticity and strength of metals at ultra-short load durations

G. I. Kanel; E. B. Zaretsky; S. V. Razorenov; S. I. Ashitkov; V. E. Fortov

doi:10.3367/UFNe.2016.12.038004

Unusual plasticity and strength of metals at ultra-short load durations

G. I. Kanel, E. B. Zaretsky, S. V. Razorenov, S. I. Ashitkov, V. E. Fortov

Department of Mechanical Engineering

Research output: Contribution to journal › Review article › peer-review

71 Scopus citations

Abstract

This paper briefly reviews recent experimental results on the temperature-rate dependences of flow and fracture stresses in metals under high strain rate conditions for pulsed shock- wave loads with durations from tens of picoseconds up to microseconds. In the experiments, ultimate (ideal') values of the shear and tensile strengths have been approached and anomalous growth of the yield stress with temperature at high strain rates has been confirmed for some metals. New evidence is obtained for the intense dislocation multiplication immediately originating in the elastic precursor of a compression shock wave. It is found that under these conditions inclusions and other strengthening factors may have a softening effect. Novel and unexpected features are observed in the evolution of elastoplastic compression shock waves.

Original language	English
Pages (from-to)	490-508
Number of pages	19
Journal	Physics-Uspekhi
Volume	60
Issue number	5
DOIs	https://doi.org/10.3367/UFNe.2016.12.038004
State	Published - 1 Jan 2017

Keywords

Dynamics of dislocations
High-rate fracture
High-rate straining
Ideal strength Anomalous thermal hardening, polycrystalline metals and single crystals
Shock waves in solids

ASJC Scopus subject areas

General Physics and Astronomy

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10.3367/UFNe.2016.12.038004

Cite this

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title = "Unusual plasticity and strength of metals at ultra-short load durations",

abstract = "This paper briefly reviews recent experimental results on the temperature-rate dependences of flow and fracture stresses in metals under high strain rate conditions for pulsed shock- wave loads with durations from tens of picoseconds up to microseconds. In the experiments, ultimate (ideal') values of the shear and tensile strengths have been approached and anomalous growth of the yield stress with temperature at high strain rates has been confirmed for some metals. New evidence is obtained for the intense dislocation multiplication immediately originating in the elastic precursor of a compression shock wave. It is found that under these conditions inclusions and other strengthening factors may have a softening effect. Novel and unexpected features are observed in the evolution of elastoplastic compression shock waves.",

keywords = "Dynamics of dislocations, High-rate fracture, High-rate straining, Ideal strength Anomalous thermal hardening, polycrystalline metals and single crystals, Shock waves in solids",

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AU - Zaretsky, E. B.

AU - Razorenov, S. V.

AU - Ashitkov, S. I.

AU - Fortov, V. E.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - This paper briefly reviews recent experimental results on the temperature-rate dependences of flow and fracture stresses in metals under high strain rate conditions for pulsed shock- wave loads with durations from tens of picoseconds up to microseconds. In the experiments, ultimate (ideal') values of the shear and tensile strengths have been approached and anomalous growth of the yield stress with temperature at high strain rates has been confirmed for some metals. New evidence is obtained for the intense dislocation multiplication immediately originating in the elastic precursor of a compression shock wave. It is found that under these conditions inclusions and other strengthening factors may have a softening effect. Novel and unexpected features are observed in the evolution of elastoplastic compression shock waves.

AB - This paper briefly reviews recent experimental results on the temperature-rate dependences of flow and fracture stresses in metals under high strain rate conditions for pulsed shock- wave loads with durations from tens of picoseconds up to microseconds. In the experiments, ultimate (ideal') values of the shear and tensile strengths have been approached and anomalous growth of the yield stress with temperature at high strain rates has been confirmed for some metals. New evidence is obtained for the intense dislocation multiplication immediately originating in the elastic precursor of a compression shock wave. It is found that under these conditions inclusions and other strengthening factors may have a softening effect. Novel and unexpected features are observed in the evolution of elastoplastic compression shock waves.

KW - Dynamics of dislocations

KW - High-rate fracture

KW - High-rate straining

KW - Ideal strength Anomalous thermal hardening, polycrystalline metals and single crystals

KW - Shock waves in solids

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JO - Physics-Uspekhi

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Unusual plasticity and strength of metals at ultra-short load durations

Abstract

Keywords

ASJC Scopus subject areas

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