On tension-compression asymmetry in ultrafine-grained and nanocrystalline metals

Ercan Gurses; Tamer S. El Sayed

doi:10.1016/j.commatsci.2010.09.028

On tension-compression asymmetry in ultrafine-grained and nanocrystalline metals

Ercan Gurses, Tamer S. El Sayed

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14 Scopus citations

Abstract

We present a physically motivated computational study explaining the tension/compression (T/C) asymmetry phenomenon in nanocrystalline (nc) and ultrafine-grained (ufg) face centered cubic (fcc) metals utilizing a variational constitutive model where the nc-metal is modeled as a two-phase material consisting of a grain interior phase and a grain boundary affected zone (GBAZ). We show that the existence of voids and their growth in GBAZ renders the material pressure sensitivity due to porous plasticity and that the utilized model provides a physically sound mechanism to capture the experimentally observed T/C asymmetry in nc- and ufg-metals. © 2010 Elsevier B.V. All rights reserved.

Original language	English (US)
Pages (from-to)	639-644
Number of pages	6
Journal	Computational Materials Science
Volume	50
Issue number	2
DOIs	https://doi.org/10.1016/j.commatsci.2010.09.028
State	Published - Dec 2010

ASJC Scopus subject areas

General Physics and Astronomy
Mechanics of Materials
General Materials Science
Computational Mathematics
General Chemistry
General Computer Science

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10.1016/j.commatsci.2010.09.028

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title = "On tension-compression asymmetry in ultrafine-grained and nanocrystalline metals",

abstract = "We present a physically motivated computational study explaining the tension/compression (T/C) asymmetry phenomenon in nanocrystalline (nc) and ultrafine-grained (ufg) face centered cubic (fcc) metals utilizing a variational constitutive model where the nc-metal is modeled as a two-phase material consisting of a grain interior phase and a grain boundary affected zone (GBAZ). We show that the existence of voids and their growth in GBAZ renders the material pressure sensitivity due to porous plasticity and that the utilized model provides a physically sound mechanism to capture the experimentally observed T/C asymmetry in nc- and ufg-metals. {\textcopyright} 2010 Elsevier B.V. All rights reserved.",

author = "Ercan Gurses and {El Sayed}, {Tamer S.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was fully funded by the KAUST baseline fund.",

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AU - Gurses, Ercan

AU - El Sayed, Tamer S.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This work was fully funded by the KAUST baseline fund.

PY - 2010/12

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N2 - We present a physically motivated computational study explaining the tension/compression (T/C) asymmetry phenomenon in nanocrystalline (nc) and ultrafine-grained (ufg) face centered cubic (fcc) metals utilizing a variational constitutive model where the nc-metal is modeled as a two-phase material consisting of a grain interior phase and a grain boundary affected zone (GBAZ). We show that the existence of voids and their growth in GBAZ renders the material pressure sensitivity due to porous plasticity and that the utilized model provides a physically sound mechanism to capture the experimentally observed T/C asymmetry in nc- and ufg-metals. © 2010 Elsevier B.V. All rights reserved.

AB - We present a physically motivated computational study explaining the tension/compression (T/C) asymmetry phenomenon in nanocrystalline (nc) and ultrafine-grained (ufg) face centered cubic (fcc) metals utilizing a variational constitutive model where the nc-metal is modeled as a two-phase material consisting of a grain interior phase and a grain boundary affected zone (GBAZ). We show that the existence of voids and their growth in GBAZ renders the material pressure sensitivity due to porous plasticity and that the utilized model provides a physically sound mechanism to capture the experimentally observed T/C asymmetry in nc- and ufg-metals. © 2010 Elsevier B.V. All rights reserved.

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DO - 10.1016/j.commatsci.2010.09.028

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EP - 644

JO - Computational Materials Science

JF - Computational Materials Science

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ER -

On tension-compression asymmetry in ultrafine-grained and nanocrystalline metals

Abstract

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