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High strength and ductility achieved in friction stir processed Ni-Co based superalloy with fine grains and nanotwins
Wang, Miao1,2; Huang, Xingwei3,4; Xue, Peng3; Wu, Shangquan1; Cui, Chuanyong2; Zhang, Qingchuan1
Corresponding AuthorCui, Chuanyong(chycui@imr.ac.cn) ; Zhang, Qingchuan(zhangqc@ustc.edu.cn)
2022-04-20
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume106Pages:162-172
AbstractThe trade-off between strength and ductility has been an enormous difficulty in the field of materials for an extended time due to their inverse correlation. In this work, friction stir processing (FSP) was for the first time performed to high-strength and high-melting-point Ni-Co based superalloy (GH4068), and enhanced strength and ductility were achieved in FSP samples. At room temperature, the FSP sample demonstrated significantly higher yield strength and ultimate tensile strength (1290 and 1670 MPa) than that of the base material (BM, 758 and 904 MPa) and advanced wrought GH4068 alloy (982 and 1291 MPa), concurrent with high tensile ductility (similar to 24%). Compared with the BM, 70% higher yield strength of the FSP sample results from the remarkable contribution of grain-boundary and nanotwin strengthening, which has been confirmed by the multimechanistic model studied in this work. More importantly, with increasing temperature, an excellent strength-ductility synergy was obtained at 400 degrees C, i.e., the yield strength of the FSP sample was increased by more than 50% compared with the BM (from 789 to 1219 MPa); more interestingly, the elongation was also significantly increased from 17.9% in the BM to 28.5% in the FSP sample. Meanwhile, the Portevin-Le Chatelier effect was observed in the engineering stress-strain curve. The occurrence of this effect may be attributed to the interaction between solutes and defects like twins and mobile dislocations. Moreover, the grain refinement mechanism of FSP samples was proved to be discontinuous dynamic recrystallization. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordSuperalloy Friction stir processing Grain refinement Nanotwins
Funding OrganizationNational Key R&D Pro-gram of China ; National Natural Science Foundation of China ; National Science and Technology Major Project ; Strategic Priority Re-search Program of the Chinese Academy of Sciences
DOI10.1016/j.jmst.2021.06.082
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Pro-gram of China[2017YFA0700703] ; National Key R&D Pro-gram of China[2019YFA0705300] ; National Natural Science Foundation of China[11872354] ; National Natural Science Foundation of China[11627803] ; National Science and Technology Major Project[J2019-V-0 0 06-010 0] ; Strategic Priority Re-search Program of the Chinese Academy of Sciences[XDB22040502]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000787725900007
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/172603
Collection中国科学院金属研究所
Corresponding AuthorCui, Chuanyong; Zhang, Qingchuan
Affiliation1.Univ Sci & Technol China, CAS Key Lab Mech Behav & Design Mat, Hefei 230027, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Superalloy Div, Shenyang 110016, Peoples R China
3.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
4.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230027, Peoples R China
Recommended Citation
GB/T 7714
Wang, Miao,Huang, Xingwei,Xue, Peng,et al. High strength and ductility achieved in friction stir processed Ni-Co based superalloy with fine grains and nanotwins[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2022,106:162-172.
APA Wang, Miao,Huang, Xingwei,Xue, Peng,Wu, Shangquan,Cui, Chuanyong,&Zhang, Qingchuan.(2022).High strength and ductility achieved in friction stir processed Ni-Co based superalloy with fine grains and nanotwins.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,106,162-172.
MLA Wang, Miao,et al."High strength and ductility achieved in friction stir processed Ni-Co based superalloy with fine grains and nanotwins".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 106(2022):162-172.
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