典型文献
A quasi-in-situ EBSD study of the thermal stability and grain growth mechanisms of CoCrNi medium entropy alloy with gradient-nanograined structure
文献摘要：
The thermal stability and mechanical properties of a gradient-nanograined structure(GNS)CoCrNi medium entropy alloy(MEA)processed by ultrasonic surface rolling were studied by using isother-mal/isochronal annealing tests combined with quasi-in-situ electron backscatter diffraction(EBSD)char-acterization and Vickers micro-hardness(HV)measurements.A layer by layer high-throughput investi-gation method was used to quantitatively study the grain growth kinetics and grain boundary evolution with different initial grain sizes,which could effectively save specimen and time costs.The grain nu-cleation and growth,as well as shrink and disappearance process through Σ3 coincidence site lattice boundary migration with slightly lattice rotation during annealing were directly revealed.The layer by layer grain growth kinetics and calculated activation energy indicate that the thermal stability of nano-grained top surface layer is relatively higher than that of nano-twined subsurface layer for the gradient CoCrNi MEA processed by ultrasonic surface rolling.Further analysis show that the grain boundary re-laxation and dynamic recrystallization of the topmost nano-grains led to the decrease of grain boundary energy,thus improving their thermal stability.The present work provided theoretical basis for the appli-cation of CoCrNi MEA at high temperatures.Moreover,the high-throughput method on the investigation of grain stability by using gradient structure can be easily extended to other materials and it is of great significance for understanding the microstructural evolution of gradient materials.
文献关键词：
中图分类号：
作者姓名：
P.-C.Zhao;B.Guan;Y.-G.Tong;R.-Z.Wang;X.Li;X.-C.Zhang;S.-T.Tu
作者机构：
Key Laboratory of Pressure Systems and Safety,Ministry of Education,School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;College of Automobile and Mechanical Engineering,Changsha University of Science and Technology,Changsha,China
文献出处：
引用格式：
[1]P.-C.Zhao;B.Guan;Y.-G.Tong;R.-Z.Wang;X.Li;X.-C.Zhang;S.-T.Tu-.A quasi-in-situ EBSD study of the thermal stability and grain growth mechanisms of CoCrNi medium entropy alloy with gradient-nanograined structure)[J].材料科学技术（英文版）,2022(14):54-63
A类：
isochronal,cleation,twined,laxation
B类：
quasi,situ,EBSD,study,thermal,stability,growth,mechanisms,CoCrNi,medium,entropy,alloy,gradient,nanograined,structure,mechanical,properties,GNS,MEA,processed,by,ultrasonic,rolling,were,studied,using,isother,annealing,tests,combined,electron,backscatter,diffraction,char,acterization,Vickers,hardness,HV,measurements,layer,throughput,method,was,used,quantitatively,kinetics,boundary,evolution,different,initial,sizes,which,could,effectively,save,specimen,costs,nu,well,shrink,disappearance,coincidence,site,lattice,migration,slightly,rotation,during,directly,revealed,calculated,activation,energy,indicate,that,relatively,higher,than,subsurface,Further,analysis,show,dynamic,recrystallization,topmost,grains,decrease,thus,improving,their,present,work,provided,theoretical,basis,appli,cation,temperatures,Moreover,investigation,be,easily,extended,materials,great,significance,understanding,microstructural
AB值：
0.484274
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
