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Amelioration of weld-crack resistance of the M951 superalloy by engineering grain boundaries
Wen, Mingyue1,2; Sun, Yuan1; Yu, Jinjiang1; Yang, Shulin3; Hou, Xingyu1; Yang, Yanhong1; Sun, Xiaofeng1; Zhou, YiZhou1
Corresponding AuthorSun, Yuan(yuansun@imr.ac.cn) ; Yu, Jinjiang(jjyu@imr.ac.cn)
2021-07-10
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume78Pages:260-267
AbstractFusion weld is a portable and economical joining and repairing method of metals. However, weld cracks often occur during the fusion weld of Ni-base superalloys, which hinder the applications of fusion weld on this kind of materials. In this work, the effects of microstructures of grain boundaries (GBs) of the prototype M951 superalloy on its weldability were investigated. The precipitated phases, the elemental segregations on GBs, and the morphologies of GBs can be largely altered by regulating the cooling rates of pre-weld heat treatments. With decreasing the cooling rate, chain-like M23X6 phase precipitates along the GBs, accompanying segregations of B, and GBs becomes more serrated in morphology. During fusion weld, the engineered GBs in the M951 superalloy with a low cooling rate favor the formation of the continuous liquid films on GBs, which together with the serrated GB morphology significantly prevents the formation of weld cracks. Our findings imply that the weld-crack resistance of the superalloys can be ameliorated by engineering GBs. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordFusion weld Superalloys M951 Weld-crack resistance Grain boundary engineering
Funding OrganizationNational Natural Science Foundation of China ; Aeronautics Power Foundation of China
DOI10.1016/j.jmst.2020.10.069
Indexed BySCI
Languageen
Funding ProjectNational Natural Science Foundation of China[51971214] ; National Natural Science Foundation of China[51771191] ; National Natural Science Foundation of China[51801206] ; Aeronautics Power Foundation of China[DLJJ1825]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000652023600025
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161111
Collection中国科学院金属研究所
Corresponding AuthorSun, Yuan; Yu, Jinjiang
Affiliation1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Shenyang Liming Aeroengine Cooperat Ltd, Shenyang 110043, Peoples R China
Recommended Citation
GB/T 7714
Wen, Mingyue,Sun, Yuan,Yu, Jinjiang,et al. Amelioration of weld-crack resistance of the M951 superalloy by engineering grain boundaries[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,78:260-267.
APA Wen, Mingyue.,Sun, Yuan.,Yu, Jinjiang.,Yang, Shulin.,Hou, Xingyu.,...&Zhou, YiZhou.(2021).Amelioration of weld-crack resistance of the M951 superalloy by engineering grain boundaries.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,78,260-267.
MLA Wen, Mingyue,et al."Amelioration of weld-crack resistance of the M951 superalloy by engineering grain boundaries".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 78(2021):260-267.
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