| 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 Author | Lu, Chuanyang(cylv@zjut.edu.cn) ; Chen, Shuanjian(chenshuangjian@sinap.ac.cn) |
| 2021-03-01 | |
| Source Publication | MATERIALS CHARACTERIZATION
 |
| ISSN | 1044-5803 |
| Volume | 173Pages:14 |
| Abstract | In 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. |
| Keyword | Hastelloy N superalloy Brazing Thermal exposure Microstructure Mechanical characterization |
| Funding Organization | National MCF Energy RD Program ; National Natural Science Foundation of China ; Natural Science Foundation of Zhejiang Province |
| DOI | 10.1016/j.matchar.2021.110947 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National 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 Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing |
| WOS ID | WOS:000626405400001 |
| Publisher | ELSEVIER SCIENCE INC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/161645 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Lu, Chuanyang; Chen, Shuanjian |
| Affiliation | 1.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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