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Tailoring microstructure and mechanical performance of Hastelloy N-Hastelloy N superalloy joint through modifying brazing processing parameters and post thermal exposure
He, Yanming1; Xiao, Fan1; Sun, Yuan2; Lu, Chuanyang1,3; Chen, Shuanjian4; Chen, Weijian1; Li, Huaxin1; Zheng, Wenjian1; Ma, Yinghe1; Ding, Zhenyu1; Yang, Jianguo1; Gao, Zengliang1
Corresponding AuthorLu, Chuanyang(cylv@zjut.edu.cn) ; Chen, Shuanjian(chenshuangjian@sinap.ac.cn)
2021-03-01
Source PublicationMATERIALS CHARACTERIZATION
ISSN1044-5803
Volume173Pages:14
AbstractIn this work, the Hastelloy N superalloy was joined using a newly-designed BNiCrWBSi brazing filler alloy. Effects of brazing processing parameters and post thermal exposure on microstructure and mechanical performance of the joints were evaluated. The microstructure in the joints was revealed with the aid of scanning electron microscope, electron back-scattered diffraction and transmission electron microscope analyses. The nano indentation technique and shear test were employed to appraise the mechanical properties (such as nano scale elastic modulus/hardness of specific phases and joint bond strength) of the joints. The results showed that the typical joint constitution could be depicted as Hastelloy N alloy/diffusion-affected zone (DAZ) or finegrained zone (FGZ)/isothermal solidification zone (ISZ)/diffusion-affected zone (DAZ) or fine-grained zone (FGZ)/Hastelloy N alloy. The appearance of the FGZ was dependent on the brazing temperature, irrespective of the soaking time. The optimum joint bond strength of 588.9 MPa was produced at 1240 degrees C for 10 min. The typical fracture procedure and mechanism were discussed based on the detailed microstructural examinations and theoretical calculations. Apart from the brazing processing parameters, the post thermal exposure could also modify the microstructure through importing tiny boride phases into the ISZ, posing a reduction in shear strength. The microstructural evolution of Hastelloy N alloy joints unveiled and relationship built between the microstructure and mechanical properties will give a significant guidance for the design and application of the superalloy brazed joint.
KeywordHastelloy N superalloy Brazing Thermal exposure Microstructure Mechanical characterization
Funding OrganizationNational MCF Energy RD Program ; National Natural Science Foundation of China ; Natural Science Foundation of Zhejiang Province
DOI10.1016/j.matchar.2021.110947
Indexed BySCI
Language英语
Funding ProjectNational MCF Energy RD Program[2019YFE03100400] ; National Natural Science Foundation of China[51705457] ; National Natural Science Foundation of China[51975530] ; National Natural Science Foundation of China[52005445] ; Natural Science Foundation of Zhejiang Province[LQ21E050015]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS IDWOS:000626405400001
PublisherELSEVIER SCIENCE INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161645
Collection中国科学院金属研究所
Corresponding AuthorLu, Chuanyang; Chen, Shuanjian
Affiliation1.Zhejiang Univ Technol, Inst Proc Equipment & Control Engn, Hangzhou 310014, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Dept Superalloy, Shenyang 110016, Peoples R China
3.East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China
4.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
Recommended Citation
GB/T 7714
He, Yanming,Xiao, Fan,Sun, Yuan,et al. Tailoring microstructure and mechanical performance of Hastelloy N-Hastelloy N superalloy joint through modifying brazing processing parameters and post thermal exposure[J]. MATERIALS CHARACTERIZATION,2021,173:14.
APA He, Yanming.,Xiao, Fan.,Sun, Yuan.,Lu, Chuanyang.,Chen, Shuanjian.,...&Gao, Zengliang.(2021).Tailoring microstructure and mechanical performance of Hastelloy N-Hastelloy N superalloy joint through modifying brazing processing parameters and post thermal exposure.MATERIALS CHARACTERIZATION,173,14.
MLA He, Yanming,et al."Tailoring microstructure and mechanical performance of Hastelloy N-Hastelloy N superalloy joint through modifying brazing processing parameters and post thermal exposure".MATERIALS CHARACTERIZATION 173(2021):14.
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