Dislocation-mediated strain hardening in tungsten: Thermo-mechanical plasticity theory and experimental validation

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Dislocation-mediated strain hardening in tungsten: Thermo-mechanical plasticity theory and experimental validation. / Terentyev, Dmitry; Xiao, Xiazi; Dubinko, Andrii; Bakaeva, Anastasiia; Duan, Huiling.

In: Journal of the Mechanics and Physics of Solids, Vol. 85, 28.08.2015, p. 1-15.

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@article{ed673626f68d410e94883e9ceba4a5d5,
title = "Dislocation-mediated strain hardening in tungsten: Thermo-mechanical plasticity theory and experimental validation",
abstract = "A self-consistentthermo-mechanicalmodeltostudythestrain-hardeningbehaviorof polycrystallinetungstenwasdevelopedandvalidatedbyadedicatedexperimentalroute. Dislocation–dislocationmultiplicationandstorage,aswelldislocation-grainboundary (GB)pinningwerethemajormechanismsunderlyingtheevolutionofplasticdeformation, thus providingalinkbetweenthestrainhardeningbehaviorandmaterial'smicro- structure.Themicrostructureofthepolycrystallinetungstensampleshasbeenthoroughly investigatedbyscanningandelectronmicroscopy.Themodelwasappliedtocompute stress–strain loadingcurvesofcommercialtungstengrades,intheas-receivedandas- annealedstates,inthetemperaturerangeof500–1000 °C. Fittingthemodeltothein- dependentexperimentalresultsobtainedusingasinglecrystalandas-receivedpoly-crystalline tungsten,themodeldemonstrateditscapabilitytopredictthedeformation behavior ofas-annealedsamplesinawidetemperaturerangeandappliedstrain.The relevanceofthedislocation-mediatedplasticitymechanismsusedinthemodelhavebeen validatedusingtransmissionelectronmicroscopyexaminationofthesamplesdeformed up todifferentamountsofstrain.Onthebasisoftheexperimentalvalidation,thelim- itationsofthemodelaredeterminedanddiscussed.",
keywords = "Tungsten, Crystal plasticity, Hardening, Dislocations",
author = "Dmitry Terentyev and Xiazi Xiao and Andrii Dubinko and Anastasiia Bakaeva and Huiling Duan",
note = "Score=10",
year = "2015",
month = "8",
day = "28",
doi = "10.1016/j.jmps.2015.08.015",
language = "English",
volume = "85",
pages = "1--15",
journal = "Journal of the Mechanics and Physics of Solids",
issn = "0022-5096",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Dislocation-mediated strain hardening in tungsten: Thermo-mechanical plasticity theory and experimental validation

AU - Terentyev, Dmitry

AU - Xiao, Xiazi

AU - Dubinko, Andrii

AU - Bakaeva, Anastasiia

AU - Duan, Huiling

N1 - Score=10

PY - 2015/8/28

Y1 - 2015/8/28

N2 - A self-consistentthermo-mechanicalmodeltostudythestrain-hardeningbehaviorof polycrystallinetungstenwasdevelopedandvalidatedbyadedicatedexperimentalroute. Dislocation–dislocationmultiplicationandstorage,aswelldislocation-grainboundary (GB)pinningwerethemajormechanismsunderlyingtheevolutionofplasticdeformation, thus providingalinkbetweenthestrainhardeningbehaviorandmaterial'smicro- structure.Themicrostructureofthepolycrystallinetungstensampleshasbeenthoroughly investigatedbyscanningandelectronmicroscopy.Themodelwasappliedtocompute stress–strain loadingcurvesofcommercialtungstengrades,intheas-receivedandas- annealedstates,inthetemperaturerangeof500–1000 °C. Fittingthemodeltothein- dependentexperimentalresultsobtainedusingasinglecrystalandas-receivedpoly-crystalline tungsten,themodeldemonstrateditscapabilitytopredictthedeformation behavior ofas-annealedsamplesinawidetemperaturerangeandappliedstrain.The relevanceofthedislocation-mediatedplasticitymechanismsusedinthemodelhavebeen validatedusingtransmissionelectronmicroscopyexaminationofthesamplesdeformed up todifferentamountsofstrain.Onthebasisoftheexperimentalvalidation,thelim- itationsofthemodelaredeterminedanddiscussed.

AB - A self-consistentthermo-mechanicalmodeltostudythestrain-hardeningbehaviorof polycrystallinetungstenwasdevelopedandvalidatedbyadedicatedexperimentalroute. Dislocation–dislocationmultiplicationandstorage,aswelldislocation-grainboundary (GB)pinningwerethemajormechanismsunderlyingtheevolutionofplasticdeformation, thus providingalinkbetweenthestrainhardeningbehaviorandmaterial'smicro- structure.Themicrostructureofthepolycrystallinetungstensampleshasbeenthoroughly investigatedbyscanningandelectronmicroscopy.Themodelwasappliedtocompute stress–strain loadingcurvesofcommercialtungstengrades,intheas-receivedandas- annealedstates,inthetemperaturerangeof500–1000 °C. Fittingthemodeltothein- dependentexperimentalresultsobtainedusingasinglecrystalandas-receivedpoly-crystalline tungsten,themodeldemonstrateditscapabilitytopredictthedeformation behavior ofas-annealedsamplesinawidetemperaturerangeandappliedstrain.The relevanceofthedislocation-mediatedplasticitymechanismsusedinthemodelhavebeen validatedusingtransmissionelectronmicroscopyexaminationofthesamplesdeformed up todifferentamountsofstrain.Onthebasisoftheexperimentalvalidation,thelim- itationsofthemodelaredeterminedanddiscussed.

KW - Tungsten

KW - Crystal plasticity

KW - Hardening

KW - Dislocations

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/26871216

U2 - 10.1016/j.jmps.2015.08.015

DO - 10.1016/j.jmps.2015.08.015

M3 - Article

VL - 85

SP - 1

EP - 15

JO - Journal of the Mechanics and Physics of Solids

JF - Journal of the Mechanics and Physics of Solids

SN - 0022-5096

ER -

ID: 3368226