第41卷第3期2024年6月J.At.Mol.Phys.,2024,41:032003(7pp)FeCrNiCoCu纳米压痕性能的分子动力学研究原子与分子物理学报JOURNALOFATOMICANDMOLECULARPHYSICSVol.41No.3Jun.2024陈风明，赵光霞（1.镇江市高等专科学校电气与信息学院，镇江212028；2.江苏联合职业技术学院镇江分院，镇江212016）摘要：纳米压痕是研究金属特性最广泛的方法之一，因此，本文采用分子动力学方法研究了晶粒数、压痕半径和压痕速度对FeCrNiCoCu压痕性能的影响：结果表明，晶粒数从4增加到16,杨氏模量和硬度值逐渐减小，呈现反Hall-Petch现象；随着压头半径的增加，杨氏模量增大，硬度受接触面积的影响较大而减小，较大的压头半径有利于模型内部位错的产生和扩展；压入速度对杨氏模量和硬度的影响微弱，压入速度越快，位错密度越低，位错传播速度越慢，本工作以期为FeCrNiCoCu的研究提供理论指导.关键词：纳米压痕；杨氏模量；硬度；位错；FeCrNiCoCu中图分类号：TG13MoleculardynamicssimulationofnanoindentationpropertiesofFeCrNiCoCu文献标识码：AD0I:10.19855/j.1000-0364.2024.032003CHENFeng-Ming,ZHAOGuang-Xia(1.ElectricandInformationCollege,ZhenjiangCollege,Zhenjiang212028,China;2.ZhenjiangBranch,JiangsuUnitedVocationalandTechnicalCollege,Zhenjiang212016,China)Abstract:Nanoindentationisoneofthemostwidelyusedmethodstoinvestigatethecharacteristicsofmetallicmaterials.Thus,inthiswork,moleculardynamicssimulationisemployedtoinvestigatetheeffectsofthenumberofgrains,theindenterradiusandtheindentervelocityontheindentationperformanceoftheFeCrNiCoCu.Theresultsshowthatwhenthenumberofgrainsincreasesfrom4to16,theYoungsmodulusandhardnessgraduallydecrease,showinganinverseHall-Petchphenomenon.Withtheincreaseoftheindenterradius,theYoung'smodulusincreases,thehardnessisgreatlyaffectedbythecontactarea,andthelargerindenterradiusiscondu-civetothegenerationandexpansionofdislocationinthemodel.TheeffectofpressingspeedonYoung'smodu-lusthehardnessisweak.Thehigherthepressingspeed,thelowerthedislocationdensityandtheslowerthedis-locationpropagation.ThepurposeofthispaperistoprovidetheoreticalguidanceforthestudyofFeCrNiCoCu.Keywords:Nanoindentation;Young'smodulus;Hardness;Dislocation;FeCrNiCoCu...
