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Surface characteristics and microstructure evolution of a nickel-base single crystal superalloy treated by ultrasonic shot peening
Li, Yifei1,2; Shang, Xiaofeng1,2; Zhai, Menggang1,2; Yu, Lei1,2; Wang, Li3; Zhao, Su1,2
Corresponding AuthorZhao, Su(zhaosu@nimte.ac.cn)
2022-10-25
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume919Pages:16
AbstractThe surface characteristics and microstructure of a [10 0]-oriented single crystal superalloy subjected to ultrasonic shot peening (USP) were investigated as a function of peening duration. The obtained results show that USP significantly increases the surface microhardness of the single crystal superalloy, reaching up to 650 HV. As peening duration increases, surface roughness and microhardness increase at first and then remain stable. Meanwhile, new components and orientations are formed on the treated surface. The depths of the cold work layer and slip band reach saturation with sufficient peening durations. However, the microstructure beneath the surface continues to evolve with increasing peening time. Excessive peening duration will facilitate the formation of curved slip bands, distinct misorientation and subgrains, which may damage the coherent strengthening of gamma/gamma ' structures and result in a lower hardness value in the depth direction. Combining the effects of surface alloying, strain-induced diffusion and strain-induced dissolution, four layers (i.e., the nanocrystalline alpha-Fe layer, Fe, Ti, Ni interdiffusion layer, nickel-based gamma '-free layer and deformed gamma/gamma ' layer) are formed on a single crystal substrate with sufficient USP durations. For single crystal superalloys, there exists an optimal processing duration to achieve the balance between surface hardening and coherent strengthening of gamma/gamma ' structures.(c) 2022 Elsevier B.V. All rights reserved.
KeywordUltrasonic shot peening Single crystal superalloy Microstructure Surface characteristic Cold work layer
Funding OrganizationPioneer and Leading Goose R &D Program of Zhejiang ; Zhejiang Provincial Natural Science Foundation of China ; Ningbo 3315 Innovation Team-Ultrasonic Impact Treatment Technology and Equipment ; Ningbo Natural Science Foundation
DOI10.1016/j.jallcom.2022.165761
Indexed BySCI
Language英语
Funding ProjectPioneer and Leading Goose R &D Program of Zhejiang[2022C01114] ; Zhejiang Provincial Natural Science Foundation of China[LQ22E010011] ; Ningbo 3315 Innovation Team-Ultrasonic Impact Treatment Technology and Equipment[Y80929DL04] ; Ningbo Natural Science Foundation[2021J221] ; Ningbo Natural Science Foundation[202003N4356]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000816075500002
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/174998
Collection中国科学院金属研究所
Corresponding AuthorZhao, Su
Affiliation1.Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China
2.Zhejiang Key Lab Aero Engine Extreme Mfg Technol, Ningbo 315201, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Li, Yifei,Shang, Xiaofeng,Zhai, Menggang,et al. Surface characteristics and microstructure evolution of a nickel-base single crystal superalloy treated by ultrasonic shot peening[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2022,919:16.
APA Li, Yifei,Shang, Xiaofeng,Zhai, Menggang,Yu, Lei,Wang, Li,&Zhao, Su.(2022).Surface characteristics and microstructure evolution of a nickel-base single crystal superalloy treated by ultrasonic shot peening.JOURNAL OF ALLOYS AND COMPOUNDS,919,16.
MLA Li, Yifei,et al."Surface characteristics and microstructure evolution of a nickel-base single crystal superalloy treated by ultrasonic shot peening".JOURNAL OF ALLOYS AND COMPOUNDS 919(2022):16.
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