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Retarding the precipitation of eta phase in Fe-Ni based alloy through grain boundary engineering
Hu, Honglei1,2; Zhao, Mingjiu1; Rong, Lijian1
Corresponding AuthorZhao, Mingjiu(mjzhao@imr.ac.cn) ; Rong, Lijian(ljrong@imr.ac.cn)
2020-06-15
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume47Pages:152-161
AbstractIt is important to inhibit the precipitation of eta phases in precipitation strengthened Fe-Ni based alloys, as they will deteriorate not only the mechanical property but also the hydrogen resistance. The present investigation shows that grain boundary engineering (GBE) can retard the formation and growth of eta phase in J75 alloy. After GBE treatment with 5% cold rolling followed by annealing at 1000 degrees C for 1 h, the fraction of special boundaries (SBs) increases from 38.4% in conventional alloy to 77.2% and the fraction of special triple junctions increases from 10% to 74%. During 800 degrees C aging treatment, quite amount of cellular eta phases adjacent to random grain boundary (RGB) will be found in conventional alloy, and only a few small eta phases have been observed in GBE treatment alloy subjected to the same aging treatment for long time. The reason for GBE in inhibiting precipitation of eta phase can be attributed to not only introducing high fraction of SBs but also breaking the connectivity of RGB networks. As nucleation and growth of eta phases on SBs are difficult due to their lower Ti concentration and diffusion rate, and the disruption of RGB networks reduces supply of Ti atoms to the eta phases significantly, which impedes their growth at RGB. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
Keywordbased alloy eta phase Precipitation behavior Random grain boundary connectivity Grain boundary engineering Boundary diffusion
Funding OrganizationNational Natural Science Foundation of China ; China Academy of Engineering Physics ; National Key Research and Development Programof China
DOI10.1016/j.jmst.2020.02.018
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China ; China Academy of Engineering Physics[U1730140] ; National Key Research and Development Programof China[2019YFB1505201]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000526956900016
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/138526
Collection中国科学院金属研究所
Corresponding AuthorZhao, Mingjiu; Rong, Lijian
Affiliation1.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, 96 Jinzhai Rd, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Hu, Honglei,Zhao, Mingjiu,Rong, Lijian. Retarding the precipitation of eta phase in Fe-Ni based alloy through grain boundary engineering[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,47:152-161.
APA Hu, Honglei,Zhao, Mingjiu,&Rong, Lijian.(2020).Retarding the precipitation of eta phase in Fe-Ni based alloy through grain boundary engineering.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,47,152-161.
MLA Hu, Honglei,et al."Retarding the precipitation of eta phase in Fe-Ni based alloy through grain boundary engineering".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 47(2020):152-161.
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