典型文献
A new approach for determining GND and SSD densities based on indentation size effect:An application to additive-manufactured Hastelloy X
文献摘要：
Dislocation plays a crucial role in controlling the strength and plasticity of bulk materials.However,de-termining the densities of geometrically necessary dislocations (GNDs) and statistically stored disloca-tions (SSDs) is one of the classical problems in material research for several decades.Here,we proposed a new approach based on indentation size effect (ISE) and strengthening theories.This approach was performed on a laser powder bed fused (L-PBF) Hastelloy X (HX),and the results were verified by the Hough-based EBSD and modified Williamson-Hall (m-WH) methods.Furthermore,to better understand the new approach and essential mechanisms,an in-depth investigation of the microstructure was con-ducted.The distribution of dislocations shows a clear grain orientation-dependent:low density in large< 101 > preferentially orientated grains while high density in fine <001 > orientated grains.The increment of strengthening in L-PBF HX is attributed to a huge amount of edge-GNDs.Planar slip is the main oper-ative deformation mechanism during indentation tests,and the slip step patterns depend mostly on grain orientations and stacking fault energy.This study provides quantitative results of GND and SSD density for L-PBF HX,which constructs a firm basis for future quantitative work on other metals with different crystal structures.
文献关键词：
中图分类号：
作者姓名：
Luqing Cui;Cheng-Han Yu;Shuang Jiang;Xiaoyu Sun;Ru Lin Peng;Jan-Erik Lundgren;Johan Moverare
作者机构：
Division of Engineering Materials,Department of Management and Engineering,Link(o)ping University,Link(o)ping SE-58183,Sweden;Siemens Energy AB,Finsp(a)ng SE-61231,Sweden
文献出处：
引用格式：
[1]Luqing Cui;Cheng-Han Yu;Shuang Jiang;Xiaoyu Sun;Ru Lin Peng;Jan-Erik Lundgren;Johan Moverare-.A new approach for determining GND and SSD densities based on indentation size effect:An application to additive-manufactured Hastelloy X)[J].材料科学技术（英文版）,2022(01):295-307
A类：
termining,GNDs,disloca
B类：
new,approach,determining,densities,indentation,size,effect,An,application,additive,manufactured,Hastelloy,Dislocation,plays,crucial,role,controlling,plasticity,bulk,materials,However,geometrically,necessary,dislocations,statistically,stored,SSDs,one,classical,problems,research,several,decades,Here,proposed,ISE,strengthening,theories,This,was,performed,laser,powder,bed,fused,PBF,HX,results,were,verified,by,Hough,EBSD,modified,Williamson,Hall,WH,methods,Furthermore,better,understand,essential,mechanisms,depth,investigation,microstructure,ducted,distribution,shows,clear,dependent,low,density,large,preferentially,orientated,grains,while,high,fine,increment,attributed,huge,amount,edge,Planar,slip,main,oper,deformation,during,tests,step,patterns,mostly,orientations,stacking,fault,energy,study,provides,quantitative,which,constructs,firm,basis,future,work,other,metals,different,crystal,structures
AB值：
0.593069
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