摘要
Dynamicstrainaging（DSA）isanimportantphenomenoninsolutehardenedmetalsandseri-ouslyaffectsthemechanicalpropertiesofmetals.DSAisgenerallyinducedbytheinteractionbetweenthemovingdislocationsandthemobilesoluteatoms.Inthispaper,onlytheinteractionbetweenmovingdisloca-tionsandmobilesoluteatomsinadislocationcorearea（coreatmosphere）willbetakenintoaccount.Toes-rablishtheconstitutivemodelwhichcandescribetheDSAphenomenon,weimprovedtheZerilli-Armstrongdislocation-mechanics-basedthermalviscoplasticconstitutiverelation,andaddedtheeffectoftheinteractionbetweenthemovingdislocationsandcoreatmosphere.BecausetheconstitutiverelationestabhshedisbasedontheZerilh-Armstrongrelation,itcandescribenotonlytheDSAphenomenon,butalsothemechanicalbe-haviorofmetalsoverabroadrangeoftemperatures（77K～1000K）andstrainrate(10-4～104s-1).Themodelpredictionfortantalumfitswellwiththeexperimentaldata.
出版日期
2002年02月12日（中国期刊网平台首次上网日期，不代表论文的发表时间）
