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Quantifying the Influences of Carbides and Porosities on the Fatigue Crack Evolution of a Ni-Based Single-Crystal Superalloy using X-ray Tomography
Liu, Keli1; Wang, Junsheng1,2; Wang, Bing1; Mao, Pengcheng3; Yang, Yanhong4; Zhou, Yizhou4
Corresponding AuthorWang, Junsheng(junsheng.wang@bit.edu.cn)
2021-07-16
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Pages13
AbstractThe detrimental effects of carbides and porosity on the fatigue crack initiation and propagation of nickel-based single-crystal superalloys have been reported by many previous studies. However, few studies have quantitatively compared the fatigue damaging effects of carbides and pores on the fatigue crack evolution. In this study, a high-resolution X-ray computed tomography (XCT) characterization of a DD5 nickel-based single-crystal superalloy during fatigue test was performed. The evolution of carbides, pores and cracks at all stages was observed and tracked. In order to quantify the 3D microstructures, a new damage factor that correlates the morphology of fracture surface with crack evolution behaviors was proposed. It was found that porosity was more detrimental than carbides in crack initiation and propagation during fatigue tests. Furthermore, pore spacing has been found to be the most significant factor among all controlling pore characteristics in the crack initiation stage and sphericity is the most critical pore characteristic in the crack propagation stage. Therefore, by statistically analyzing the evolution of carbides and pores during fatigue tests in this study, the underlying fatigue cracking mechanism of nickel-based superalloys is revealed.
KeywordX-ray tomography Ni-based superalloys Fatigue Porosity Carbide Crack initiation Crack propagation
Funding OrganizationMinistry of Industry and Information Technology through the National Science and Technology Major Project of China
DOI10.1007/s40195-021-01273-7
Indexed BySCI
Language英语
Funding ProjectMinistry of Industry and Information Technology through the National Science and Technology Major Project of China[2017-VI-0003-0073]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000673256600002
PublisherCHINESE ACAD SCIENCES, INST METAL RESEARCH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/160192
Collection中国科学院金属研究所
Corresponding AuthorWang, Junsheng
Affiliation1.Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
2.Beijing Inst Technol, Adv Res Inst Multidisciplinary Sci, Beijing 100081, Peoples R China
3.Beijing Inst Technol, Ctr Micro & Nano Technol, Beijing 100081, Peoples R China
4.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Liu, Keli,Wang, Junsheng,Wang, Bing,et al. Quantifying the Influences of Carbides and Porosities on the Fatigue Crack Evolution of a Ni-Based Single-Crystal Superalloy using X-ray Tomography[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2021:13.
APA Liu, Keli,Wang, Junsheng,Wang, Bing,Mao, Pengcheng,Yang, Yanhong,&Zhou, Yizhou.(2021).Quantifying the Influences of Carbides and Porosities on the Fatigue Crack Evolution of a Ni-Based Single-Crystal Superalloy using X-ray Tomography.ACTA METALLURGICA SINICA-ENGLISH LETTERS,13.
MLA Liu, Keli,et al."Quantifying the Influences of Carbides and Porosities on the Fatigue Crack Evolution of a Ni-Based Single-Crystal Superalloy using X-ray Tomography".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2021):13.
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