Shock wave determination of temperature dependence of twinning stress in vanadium and tantalum

Amit Sher; Louisa Meshi; Sergei Kalabukhov; Nachum Frage; Eugene B. Zaretsky

doi:10.1016/j.msea.2021.142537

Shock wave determination of temperature dependence of twinning stress in vanadium and tantalum

Amit Sher, Louisa Meshi, Sergei Kalabukhov, Nachum Frage, Eugene B. Zaretsky

Ben-Gurion University of the Negev

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

The temperature dependencies of twinning stress τ_tw in pure polycrystalline BCC vanadium and tantalum were established using shock wave approach based on two types of shock wave experiments. In the tests of the first type, relatively thick samples were softly recovered after planar impact loading and underwent metallographic examination for determination of twin density N_tw(h) (number of twins per unit area) variation as a function of distance h from the impacted sample surface. In the impact tests of the second type, variation of the shear stress with h, τ(h), was studied with the samples of the same metal of different thickness. The latter, being combined with N_tw(h), allows determination of N_tw(τ) and of the shear stress τ_tw at which N_tw becomes equal to zero. Varying initial sample temperature T made it possible to establish temperature dependencies τ_tw(T) over 300–700 and 300–800 K temperature ranges for vanadium and tantalum, respectively. The relation of the obtained results with possible scheme of twins nucleation and growth is discussed.

Original language	English
Article number	142537
Journal	Materials Science and Engineering: A
Volume	833
DOIs	https://doi.org/10.1016/j.msea.2021.142537
State	Published - 26 Jan 2022
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2021

Funding

The authors are grateful to Mr. A. Hazan and Mr. D. Nir for their help in preparation of the samples for metallographic examination. Financial supports from the Israel Science Foundation (grant 441/18 ) to E.B. Zaretsky and N. Frage, and the Israeli Ministry of Defense (grant 8757643 ) to E.B. Zaretsky are gratefully acknowledged.

Funders	Funder number
Israel Science Foundation	441/18
Ministry of Defense	8757643

Keywords

Shock loading
Tantalum
Twin nucleation and growth
Twining stress
Vanadium

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10.1016/j.msea.2021.142537

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title = "Shock wave determination of temperature dependence of twinning stress in vanadium and tantalum",

abstract = "The temperature dependencies of twinning stress τtw in pure polycrystalline BCC vanadium and tantalum were established using shock wave approach based on two types of shock wave experiments. In the tests of the first type, relatively thick samples were softly recovered after planar impact loading and underwent metallographic examination for determination of twin density Ntw(h) (number of twins per unit area) variation as a function of distance h from the impacted sample surface. In the impact tests of the second type, variation of the shear stress with h, τ(h), was studied with the samples of the same metal of different thickness. The latter, being combined with Ntw(h), allows determination of Ntw(τ) and of the shear stress τtw at which Ntw becomes equal to zero. Varying initial sample temperature T made it possible to establish temperature dependencies τtw(T) over 300–700 and 300–800 K temperature ranges for vanadium and tantalum, respectively. The relation of the obtained results with possible scheme of twins nucleation and growth is discussed.",

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author = "Amit Sher and Louisa Meshi and Sergei Kalabukhov and Nachum Frage and Zaretsky, {Eugene B.}",

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doi = "10.1016/j.msea.2021.142537",

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AU - Sher, Amit

AU - Meshi, Louisa

AU - Kalabukhov, Sergei

AU - Frage, Nachum

AU - Zaretsky, Eugene B.

PY - 2022/1/26

Y1 - 2022/1/26

N2 - The temperature dependencies of twinning stress τtw in pure polycrystalline BCC vanadium and tantalum were established using shock wave approach based on two types of shock wave experiments. In the tests of the first type, relatively thick samples were softly recovered after planar impact loading and underwent metallographic examination for determination of twin density Ntw(h) (number of twins per unit area) variation as a function of distance h from the impacted sample surface. In the impact tests of the second type, variation of the shear stress with h, τ(h), was studied with the samples of the same metal of different thickness. The latter, being combined with Ntw(h), allows determination of Ntw(τ) and of the shear stress τtw at which Ntw becomes equal to zero. Varying initial sample temperature T made it possible to establish temperature dependencies τtw(T) over 300–700 and 300–800 K temperature ranges for vanadium and tantalum, respectively. The relation of the obtained results with possible scheme of twins nucleation and growth is discussed.

AB - The temperature dependencies of twinning stress τtw in pure polycrystalline BCC vanadium and tantalum were established using shock wave approach based on two types of shock wave experiments. In the tests of the first type, relatively thick samples were softly recovered after planar impact loading and underwent metallographic examination for determination of twin density Ntw(h) (number of twins per unit area) variation as a function of distance h from the impacted sample surface. In the impact tests of the second type, variation of the shear stress with h, τ(h), was studied with the samples of the same metal of different thickness. The latter, being combined with Ntw(h), allows determination of Ntw(τ) and of the shear stress τtw at which Ntw becomes equal to zero. Varying initial sample temperature T made it possible to establish temperature dependencies τtw(T) over 300–700 and 300–800 K temperature ranges for vanadium and tantalum, respectively. The relation of the obtained results with possible scheme of twins nucleation and growth is discussed.

KW - Shock loading

KW - Tantalum

KW - Twin nucleation and growth

KW - Twining stress

KW - Vanadium

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Shock wave determination of temperature dependence of twinning stress in vanadium and tantalum

Abstract

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Keywords

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