Influence of pressure on the microstructural evolution of Ta during shear deformation

The effect of high pressure on the mechanical behavior and accompanying microstructural evolution in Ta has been investigated. Thin-foil Ta samples were deformed while being subjected to pressures in the 1–5GPa range in a modified opposed-anvil Bridgman apparatus. Examination of deformed microstruct...

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Bibliographic Details
Published inScripta materialia Vol. 80; pp. 21 - 24
Main Authors Escobedo, J.P., Field, D.P., Leblanc, M.M., Florando, J.N., Lassila, D.H.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.06.2014
Subjects
bcc
Dislocation dynamics
High pressure
Mechanical behavior
Tantalum
Mechanical behavior
Tantalum
bcc
Dislocation dynamics
High pressure
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Summary:The effect of high pressure on the mechanical behavior and accompanying microstructural evolution in Ta has been investigated. Thin-foil Ta samples were deformed while being subjected to pressures in the 1–5GPa range in a modified opposed-anvil Bridgman apparatus. Examination of deformed microstructures revealed similar changes in texture in all samples, independent of pressure. However, dislocation structures are observed to change from entanglements to well-developed dislocation cells with increasing pressure. Dislocation dynamics simulations are used to explain the experimental results.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2014.02.006