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Effects of nitrogen content on microstructures and tensile properties of a new Ni-Fe based wrought superalloy
Liu, Peng1,2; Zhang, Rui1; Yuan, Yong3; Cui, Chuanyong1; Liang, Faguang3; Liu, Xi3; Gu, Yuefeng3; Zhou, Yizhou1; Sun, Xiaofeng1
Corresponding AuthorZhang, Rui(rzhang@imr.ac.cn) ; Cui, Chuanyong(chycui@imr.ac.cn)
2021-01-13
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume801Pages:10
AbstractThe influence of the nitrogen (N) content (0.0013-0.034 wt%) on the microstructures and 750 ?C tensile properties of a newly developed Ni-Fe based wrought superalloy (named as HT700T alloy) for ultra-supercritical power plant applications beyond 700 ?C was investigated using scanning electron microscopy (SEM), electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) techniques. The results show that the increase in the N content promotes the morphological transformation of the intergranular Cr23C6 carbides from semi-continuous rods to discrete granular particles, and leads to the decrease of the amount of the Cr23C6 carbides. Meanwhile, the increase in the N content promotes the formation of the MX phase and the MX phase more preferentially forms at the grain boundary. The N content has no obvious effects on the morphology of the gamma ' phase, but slightly decreases the gamma ' fraction. The average grain size continuously decreases with the increase of N content and the proportion of low Sigma coincident site lattice (CSL) boundary significantly increases at the 0.0077% N content. The 750 degrees C tensile properties show that the increase of N content has little effect on the yield and tensile strength of the alloy, while the ductility increases remarkably. A mixture fracture mode of intergranular and transgranular occurs in all samples regardless of the N content. The dominant deformation mechanism is gamma ' bypassing via Orowan looping regardless of the N content, while deformation microtwinning and stacking faults shearing the gamma ' precipitates are confirmed to be the assistant deformation mechanisms at the 0.0077% N content.
KeywordNi-Fe based wrought superalloy Nitrogen Microstructure Tensile property Deformation mechanism
Funding OrganizationNational Natural Science Foundation of China ; Ministry of Science and Technology of China
DOI10.1016/j.msea.2020.140436
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51671189] ; Ministry of Science and Technology of China[2017YFA0700703] ; Ministry of Science and Technology of China[2019YFA0705304]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000600959500003
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/158799
Collection中国科学院金属研究所
Corresponding AuthorZhang, Rui; Cui, Chuanyong
Affiliation1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Xian Thermal Power Res Inst Co Ltd, Xian 710032, Peoples R China
Recommended Citation
GB/T 7714
Liu, Peng,Zhang, Rui,Yuan, Yong,et al. Effects of nitrogen content on microstructures and tensile properties of a new Ni-Fe based wrought superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2021,801:10.
APA Liu, Peng.,Zhang, Rui.,Yuan, Yong.,Cui, Chuanyong.,Liang, Faguang.,...&Sun, Xiaofeng.(2021).Effects of nitrogen content on microstructures and tensile properties of a new Ni-Fe based wrought superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,801,10.
MLA Liu, Peng,et al."Effects of nitrogen content on microstructures and tensile properties of a new Ni-Fe based wrought superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 801(2021):10.
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