Dynamicmechanicalpropertiesandconstitutiverelationshipof

hardenedsteel(45HRC)underhightemperatureandhighstrainrate

LI Guo-he; WANG Min-jie

doi:10.11883/1001-1455(2010)04-0433-06

Volume 30 Issue 4

May 2014

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LI Guo-he, WANG Min-jie. Dynamicmechanicalpropertiesandconstitutiverelationshipofhardenedsteel(45HRC)underhightemperatureandhighstrainrate[J]. Explosion And Shock Waves, 2010, 30(4): 433-438. doi: 10.11883/1001-1455(2010)04-0433-06

Citation:

LI Guo-he, WANG Min-jie. Dynamicmechanicalpropertiesandconstitutiverelationshipof hardenedsteel(45HRC)underhightemperatureandhighstrainrate[J]. Explosion And Shock Waves, 2010, 30(4): 433-438. doi: 10.11883/1001-1455(2010)04-0433-06

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Dynamicmechanicalpropertiesandconstitutiverelationshipof hardenedsteel(45HRC)underhightemperatureandhighstrainrate

doi: 10.11883/1001-1455(2010)04-0433-06

LI Guo-he^,,
WANG Min-jie

1.
KeyLaboratoryof MinistryofEducationforPrecisionand Non-traditionalMachining,
2.
DalianUniversityofTechnology,Dalian116024,Liaoning,China;

Funds:

NationalNaturalScienceFoundationofChina(50775018)

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Corresponding author: LI Guo-he
Publish Date: 2010-07-25

Abstract

Abstract

Toexplorethedynamicmechanicalpropertiesofhardenedsteel(45HRC),quasi-staticand dynamiccompressionexperimentswereperformedinthetemperaturerangefrom20℃to800℃and thestrainraterangefrom10-3s-1to104s-1 byusinganelectronicuniversaltestingmachineanda splitHopkinsonpressurebarsystem,respectively.Andthestress-straincurveswereexperimentally obtained.Theresultsindicatetheflowstressofhardened45steelisnotsensitivetostrainrate,but sensitivetotemperature.Theflowstressincreaseswiththeincreaseofstrainrateanddecreaseswith theincreaseoftemperature.Theconstitutiverelationshipofhardenedsteel(45HRC)underhightemperatureandhighstrainratewasfittedbytheimprovedJohnson- Cookconstitutiverelationshipin whichtheGaussianfunctionwasusedtodescribethetemperatureeffect.Thefittedcurveisingoodagreementwiththeexperimentaldata.
- solidmechanics,
- dynamicmechanicalproperties