典型文献
Double minimum creep processing and mechanism for γ'strengthened cobalt-based superalloy
文献摘要：
The double minimum creep,characterized by two creep rate minima,in Co-based superalloy is inves-tigated using a phase-field model coupled with a crystal plasticity model.The constitutive modeling,based on the dislocation slip theory considering dislocation interaction,is applied to simulate microstruc-tural evolution and deformation behavior.Rafting process commences at the beginning of creep until the global minimum of creep rate is reached,demonstrating a strengthening effect from N-type rafts under compressive creep.The high shear strain rate of(111)[011]slip system in the intersections of horizontal and vertical γ channels leads to a slight increase of creep rate after the first local minimum.The evo-lution of stress field shows that the softening effect is the combined effect of the increase of resolved shear stress and the decrease of hardening stress in the intersections.Further,these changes in stress are primarily caused by the dislocation annihilation and the inhomogeneous plastic deformation.This study indicates that the intermediate local softening stage during creep may be eliminated if the initial inter-distance between γ'precipitates is decreased.
文献关键词：
中图分类号：
作者姓名：
Jia Chen;Min Guo;Min Yang;Lin Liu;Jun Zhang
作者机构：
State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China
文献出处：
引用格式：
[1]Jia Chen;Min Guo;Min Yang;Lin Liu;Jun Zhang-.Double minimum creep processing and mechanism for γ'strengthened cobalt-based superalloy)[J].材料科学技术（英文版）,2022(17):123-129
A类：
Rafting
B类：
Double,minimum,creep,processing,mechanism,strengthened,cobalt,superalloy,double,characterized,by,two,rate,minima,Co,inves,tigated,using,phase,field,coupled,crystal,plasticity,constitutive,modeling,dislocation,slip,theory,considering,interaction,applied,simulate,microstruc,tural,evolution,deformation,behavior,commences,beginning,until,global,reached,demonstrating,strengthening,effect,from,type,rafts,under,compressive,high,shear,strain,system,intersections,horizontal,vertical,channels,leads,slight,increase,after,first,local,stress,shows,that,softening,combined,resolved,hardening,Further,these,changes,are,primarily,caused,annihilation,inhomogeneous,This,study,indicates,intermediate,stage,during,may,eliminated,if,initial,distance,between,precipitates,decreased
AB值：
0.582768
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