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

Dmitry Terentyev; Xiazi Xiao; Andrii Dubinko; Anastasiia Bakaeva; Huiling Duan

doi:10.1016/j.jmps.2015.08.015

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

Dmitry Terentyev, Xiazi Xiao, Andrii Dubinko, Anastasiia Bakaeva, Huiling Duan

Research output › peer-review

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.

Original language	English
Pages (from-to)	1-15
Number of pages	15
Journal	Journal of the Mechanics and Physics of Solids
Volume	85
DOIs	https://doi.org/10.1016/j.jmps.2015.08.015
State	Published - 28 Aug 2015

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10.1016/j.jmps.2015.08.015

Cite this

@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 = aug,

day = "28",

doi = "10.1016/j.jmps.2015.08.015",

language = "English",

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journal = "Journal of the Mechanics and Physics of Solids",

publisher = "Elsevier Ltd",

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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

ER -