Effect of strain rate on plastic deformation bonding behavior of Ni-based superalloys

作     者：Jian Yang Zhang Bin Xu Naeem ul Haq Tariq Ming Yue Sun Dian Zhong Li Yi Yi Li Jian Yang Zhang;Bin Xu;Naeem ul Haq Tariq;Ming Yue Sun;Dian Zhong Li;Yi Yi Li

作者机构：Key Laboratory of Nuclear Materials and Safety AssessmentInstitute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and EngineeringUniversity of Science and Technology of ChinaShenyang110016China Shenyang National Laboratory for Materials ScienceInstitute of Metal ResearchChinese Academy of SciencesShenyang110016China Department of Metallurgy and Materials EngineeringPakistan Institute of Engineering and Applied SciencesNiloreIslamabadPakistan 

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

年 卷 期：2020年第40卷第5期

页      面：54-63页

核心收录：

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

基　　金：supported by the National Key Research and Development Program[grant number 2018YFA0702900] the National Natural Science Foundation of China[grant numbers U1508215,51774265] the National Science and Technology Major Project of China[Grant No.2019ZX06004010] the Key Program of the Chinese Academy of Sciences[grant number ZDRW-CN-20171] Program of CAS Interdisciplinary Innovation Team 

主　　题：Inconel 718 superalloy Isothermal compression bonding Dynamic recrystallization Grain boundary Subgrain Strain rate 

摘      要：Plastic deformation bonding(PDB)has emerged as a promising solid state bonding technique with limited risk of phase transformations and residual thermal stresses in the *** this study,the PDB behavior of IN718 superalloy was systematically investigated by performing a series of isothermal compression tests at various processing *** was revealed that,with increasing PDB strain rate at 1000?C,different extents of dynamic recrystallization(DRX)occur in the bonding area of IN718 *** extent of DRX,average size of DRXed grains,and a newly proposedinterfacial bonding ratio(?Bonding)parameter(to quantify the bond quality)were initially reduced with increase in the strain rate up to 0.1 s-1 and later increased at further higher strain *** backscattered diffraction(EBSD)and transmission electron microscopy(TEM)based interfacial microstructure analyses indicated that the quality of the bonded joints is closely related with the development of fine DRXed grains at the bonding interface with the increasing strain,which promotes adiabatic temperature *** was revealed that the initial bulging and subsequent migration of the original interfacial grain boundary(IGB)were the main mechanisms promoting DRX in the well bonded IN718 superalloy ***,the mechanical properties of the bonded joints were not only controlled by the recrystallized microstructure but also depended upon the Bonding parameter of the joints.