γ"variant-sensitive deformation behaviour of Inconel 718 superalloy

作     者：R.Y.Zhang H.L.Qin Z.N.Bi Y.T.Tang J.Araújo de Oliveira T.L.Lee C.Panwisawas S.Y.Zhang J.Zhang J.Li H.B.Dong R.Y.Zhang;H.L.Qin;Z.N.Bi;Y.T.Tang;J.Araújo de Oliveira;T.L.Lee;C.Panwisawas;S.Y.Zhang;J.Zhang;J.Li;H.B.Dong

作者机构：Centre of Excellence for Advanced MaterialsDongguan 523808China School of EngineeringUniversity of LeicesterUniversity RoadLeicester LE17RHUnited Kingdom Beijing Key Laboratory of Advanced High Temperature MaterialsCentral Iron and Steel Research InstituteBeijing 100081China Department of MaterialsUniversity of OxfordParks RoadOxford OX13PHUnited Kingdom StressMapEngineering and Innovation DepartmentThe Open UniversityWalton HallMilton Keynes MK76AAUnited Kingdom ISIS Neutron SourceRutherford Appleton LaboratoryHarwell Science and Innovation CampusChiltonOxfordshire OX110QXUnited Kingdom School of Material Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第126卷第31期

页      面：169-181页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：support from the Guangdong Introducing Innovative and Entrepreneurial Teams(No.2016ZT06G025)and the financial support from the Centre for Doctoral Training in Innovative Metal Processing(IMPaCT)funded by the UK Engineering and Physical Sciences Research Council(EPSRC No.EP/L016206/1).The authors also acknowledge useful discussions by Dr.Xingzhong Liang and the allocation of beam time(RB1820207)at ENGIN-X ISIS Rutherford Appleton Labora-tory.Chinnapat Panwisawas would like to acknowledge the funding from Innovation Fellowship by EPSRC UK Research and Innovation(UKRI No.EP/S000828/2).Shuyan Zhang gratefully acknowledges the support from the Guangdong Major Project of Basic and Ap-plied Basic Research(No.2020B0301030001)and the Strategic Pri-ority Research Program of the Chinese Academy of Sciences(No.XDC04000000) 

主　　题：Ni-base superalloys Precipitation strengthening Neutron diffraction Lattice strains Plastic deformation 

摘      要：Strengthening in Inconel 718 superalloy is derived from dislocation interaction withγprecipitates,which exist in disk-shaped three possible orientation variants with their{100}habit plane normal to each *** interactions between dislocations andγprecipitates vary according to theγorienta-tion variants,which makes the deformation behaviour complicated and difficult to reveal *** this work,γvariant distributions of Inconel 718 samples were tailored by ageing heat treatment under either tensile or compressive ***γvariant-sensitive deformation behaviours were then studied by in situ tensile tests via neutron diffraction at room *** is demonstrated that yield-ing first takes place in grains oriented withparallel to the loading *** identical lattice strain response to applied stress of both theγmatrix and theγprecipitates was observed during yield-ing,suggesting that dislocations shearing through theγprecipitates is predominant at this ***-ations in yield strength for samples with differentγvariant distributions were observed,which can be attributed to different strengthening that arises from interactions between dislocation and differentγvariants.