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Improved Spallation Resistance of the Oxide Scale by Hf/Y Co-doping in Ni-Based Superalloy at High Temperature
Rehman, Khalil1,2; Sheng, Naicheng1; Fan, Shigang1; Sun, Shijie1; Hou, Guicheng1; Zhou, Yizhou1; Sun, Xiaofeng1
Corresponding AuthorSheng, Naicheng(ncsheng@imr.ac.cn)
2022-04-08
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Pages15
AbstractNi-based superalloys added with comparably higher concentrations of single-doped Hf and co-doped Hf/Y are prepared by vacuum induction melting (VIM). The oxidation properties up to 300 h at 900 degrees C, 1000 degrees C, and 1100 degrees C are investigated. The undoped alloy exhibited a minimum oxidation rate at 900 degrees C and 1000 degrees C. The co-doped alloy showed a higher oxidation rate; however, it possesses better scale adhesion, and no spallation occurs. Hf-doped alloy showed a lower oxidation rate and better scale adhesion at 900 degrees C and 1000 degrees C, but exhibited a shorter lifetime at 1100 degrees C. The spallation of the Hf-doped alloy is attributed to the precipitation of the HfO2 in and beneath the oxide scale. The spallation in the undoped alloy is accredited to the thermal expansion mismatch between the growing oxide scale and superalloy substrate. Incorporating two reactive elements (REs) in alloy minimized the precipitation of RE oxide in the oxide scale, diminished internal oxidation in the alloy, and decreased oxide scale spallation.
KeywordSuperalloys Reactive elements Oxidation kinetics Microstructure Spallation resistance
Funding OrganizationNational Natural Science Foundation of China
DOI10.1007/s40195-022-01407-5
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51971214]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000781275200001
PublisherCHINESE ACAD SCIENCES, INST METAL RESEARCH
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/172973
Collection中国科学院金属研究所
Corresponding AuthorSheng, Naicheng
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, Hefei 230026, Peoples R China
Recommended Citation
GB/T 7714
Rehman, Khalil,Sheng, Naicheng,Fan, Shigang,et al. Improved Spallation Resistance of the Oxide Scale by Hf/Y Co-doping in Ni-Based Superalloy at High Temperature[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2022:15.
APA Rehman, Khalil.,Sheng, Naicheng.,Fan, Shigang.,Sun, Shijie.,Hou, Guicheng.,...&Sun, Xiaofeng.(2022).Improved Spallation Resistance of the Oxide Scale by Hf/Y Co-doping in Ni-Based Superalloy at High Temperature.ACTA METALLURGICA SINICA-ENGLISH LETTERS,15.
MLA Rehman, Khalil,et al."Improved Spallation Resistance of the Oxide Scale by Hf/Y Co-doping in Ni-Based Superalloy at High Temperature".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2022):15.
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