Room temperature tensile deformation behavior of a Ni-based superalloy with high W content  

作　　者：De-long Shu Jun Xie Feng-jiang Zhang Gui-chen Hou Zhen-jiang Wang Shu-ling Xun Jin-jiang Yu Xiao-feng Sun Yi-zhou Zhou 

机构地区：[1]Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China

出　　处：《China Foundry》2021年第3期192-198,共7页中国铸造（英文版）

基　　金：financially supported by the National Basic Research Program of China(Nos.2010CB631200 and 2010CB631206);the National Natural Science Foundation of China(No.51701212,No.50931004,No.51571196,No.51601192 and No.51671188);the State Key Laboratory of Solidification Processing in NWPU(SKLSP201747);Liaoning Provincial Natural Science Foundation of China(No.2019-MS-336);the Key Regional Project of Science and Technology Service Network Program,Chinese Academy of Sciences(No.KFJ-STS-QYZX-079);the Youth Innovation Promotion Association Project,Chinese Academy of Sciences(2020);the National Science and Technology Major Project(J2019-VI-0018-0133)。

摘　　要：K416B Ni-based superalloy with high W content has good high temperature properties and low cost,which has a great development potential.To investigate the room temperature tensile property and the deformation feature of K416B superalloy,tensile testing at room temperature was carried out,and optical microscopy (OM),scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to analyze the deformation and damage mechanisms.Results show that the main room temperature tensile deformation features of the K416B nickel-based superalloy are dislocations slipping in the matrix and shearing into γ’ phase.The <110> super-dislocations shearing into γ’ phase can form the anti-phase boundary two coupled (a/2)<110> partial-dislocations or decompose into the configuration of two (a/3)<112> partial dislocations plus stacking fault.In the later stage of tensile testing,the slip-lines with different orientations are activated in the grain,causing the stress concentration in the regions of block carbide or the porosity,and cracks initiate and propagate along these regions.

关 键 词：Ni-based superalloy high W content microstructure tensile behavior deformation feature 

分 类 号：TG146.15[一般工业技术—材料科学与工程]