Anomalous softening of yield strength in tantalum at high pressures

The pressure dependence of the yield strength of tantalum was investigated experimentally up to 101 GPa at room temperature using a diamond anvil cell. A yield strength softening is observed between 52 and 84 GPa, whereas a normal trend is observed below 52 GPa and above 84 GPa. The onset pressure o...

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Published in:Journal of applied physics 2015-02, Vol.117 (5)
Main Authors: Jing, Qiumin, Wu, Qiang, Xu, Ji-an, Bi, Yan, Liu, Lei, Liu, Shenggang, Zhang, Yi, Geng, Huayun
Format: Article
Language:English
Subjects:
Applied physics
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Diamond anvil cells
DIAMONDS
GRAIN ORIENTATION
PHASE TRANSFORMATIONS
Preferred orientation
PRESSURE DEPENDENCE
PRESSURE GRADIENTS
PRESSURE RANGE GIGA PA
SHOCK WAVES
Softening
STRAINS
Structural damage
TANTALUM
TEMPERATURE RANGE 0273-0400 K
YIELD STRENGTH
Yield stress
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cited_by cdi_FETCH-LOGICAL-c320t-51b82d61d471676c1848c8c6b6b3c173b6274595b14cece40b7a234871c142a03
cites cdi_FETCH-LOGICAL-c320t-51b82d61d471676c1848c8c6b6b3c173b6274595b14cece40b7a234871c142a03
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container_issue 5
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container_title Journal of applied physics
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creator Jing, Qiumin
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Xu, Ji-an
Bi, Yan
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Liu, Shenggang
Zhang, Yi
Geng, Huayun
description The pressure dependence of the yield strength of tantalum was investigated experimentally up to 101 GPa at room temperature using a diamond anvil cell. A yield strength softening is observed between 52 and 84 GPa, whereas a normal trend is observed below 52 GPa and above 84 GPa. The onset pressure of the softening is in agreement with previous results obtained by the pressure gradient method and shock wave experiments. This unusual strength softening in tantalum is not related with structural transformation, preferred orientation, or material damage. Our measurements indicate that microscopic deviatoric strain is the major reason for the observed strength softening in tantalum.
doi_str_mv 10.1063/1.4906977
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source American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list)
subjects Applied physics
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Diamond anvil cells
DIAMONDS
GRAIN ORIENTATION
PHASE TRANSFORMATIONS
Preferred orientation
PRESSURE DEPENDENCE
PRESSURE GRADIENTS
PRESSURE RANGE GIGA PA
SHOCK WAVES
Softening
STRAINS
Structural damage
TANTALUM
TEMPERATURE RANGE 0273-0400 K
YIELD STRENGTH
Yield stress
title Anomalous softening of yield strength in tantalum at high pressures
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