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Influence of Co content on the microstructures and mechanical properties of a Ni-Co base superalloy made by specific additive manufacturing process
Tang, Ling1,2; Liang, Jingjing1,3; Cui, Chuanyong1; Li, Jinguo1,3; Zhou, Yizhou1; Sun, Xiaofeng1; Ding, Yutian4
Corresponding AuthorLiang, Jingjing(jjliang@imr.ac.cn) ; Cui, Chuanyong(chycui@imr.ac.cn)
2020-06-01
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume786Pages:10
AbstractMicrostructures and tensile properties of a Ni-Co base superalloy containing different Co contents made by additive manufacturing (AM) after standard heat treatment have been investigated. Microstructure observation by scanning electron microscopy (SEM) reveals that a great deal of eta precipitates form in the interdendritic region and distribute linearly along the columnar microstructure in 5Co alloy. In addition, transmission electron microscopy (TEM) results reveal that spherical gamma' phase can be found in 5Co alloy and nearly cuboidal gamma' phase can been observed in 23Co alloy. The different morphologies of the gamma' precipitate can be attributed to the different gamma' compositions and the differences in gamma/gamma' lattice misfit in the two alloys. The results of tensile tests reveal that, when tested below 500 degrees C, the ultimate strength and the elongation of the alloys made by AM are lower than that of the cast & wrought (C&W) alloys. When tested at 750 degrees C and 800 degrees C, alloys made by AM exhibit higher yield strength and superior plasticity. With the increment of the testing temperature, deformation mechanism of the alloys transforms from dislocation glide to stacking fault shearing and deformation twinning. Increasing of Co content can decrease the stacking fault energy (SFE) and facilitate the initiation of twinning, therefore, deformation mechanisms between the 5Co alloy and 23Co alloy made by AM are of notable difference.
KeywordAdditive manufacturing Ni-Co base Superalloy Tensile strength Deformation mechanism
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; National High Technology Research and Development Program (863) ; State Key Laboratory of Solidification Processing in NWPU
DOI10.1016/j.msea.2020.139438
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2017FB1103800] ; National Key R&D Program of China[2018FB1106600] ; National Key R&D Program of China[2017YFA0700703] ; National Key R&D Program of China[2018FB1106000] ; National Key R&D Program of China[2019YFA0705304] ; National Natural Science Foundation of China (NSFC)[51771190] ; National Natural Science Foundation of China (NSFC)[51671189] ; National Natural Science Foundation of China (NSFC)[U1508213] ; National High Technology Research and Development Program (863)[2014AA041701] ; State Key Laboratory of Solidification Processing in NWPU[SKLSP201834]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000541737900032
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/139511
Collection中国科学院金属研究所
Corresponding AuthorLiang, Jingjing; Cui, Chuanyong
Affiliation1.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, 96 Jinzhai Rd, Hefei 230026, Peoples R China
3.Space Mfg Technol CAS Key Lab, Beijing 100094, Peoples R China
4.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, 287 Langongping Rd, Lanzhou 730000, Peoples R China
Recommended Citation
GB/T 7714
Tang, Ling,Liang, Jingjing,Cui, Chuanyong,et al. Influence of Co content on the microstructures and mechanical properties of a Ni-Co base superalloy made by specific additive manufacturing process[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,786:10.
APA Tang, Ling.,Liang, Jingjing.,Cui, Chuanyong.,Li, Jinguo.,Zhou, Yizhou.,...&Ding, Yutian.(2020).Influence of Co content on the microstructures and mechanical properties of a Ni-Co base superalloy made by specific additive manufacturing process.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,786,10.
MLA Tang, Ling,et al."Influence of Co content on the microstructures and mechanical properties of a Ni-Co base superalloy made by specific additive manufacturing process".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 786(2020):10.
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