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Microstructure refinement and grain size distribution in crack initiation region of very-high-cycle fatigue regime for high-strength alloys
Chang YK(常玉坤)1,3; Pan XN(潘向南)1,2; Zheng L3; Hong YS(洪友士)1,2
Source PublicationINTERNATIONAL JOURNAL OF FATIGUE
2020-05-01
Volume134Pages:12
ISSN0142-1123
Abstract

The microstructural features underneath the fracture surfaces of high-strength alloys experienced very-high-cycle fatigue were further investigated to show the nanograin layer in crack initiation regions under negative stress ratios due to numerous cyclic pressing (NCP) mechanism. The grain size and the thickness of nanograin layer in fine granular area of high-strength steels and rough area of titanium alloys were measured. A normalized quantity d* was proposed to characterize the distribution of the nanograin size. A new schematic to express NCP process was depicted to describe the contacting actions between crack surfaces, which causes the microstructure refinement of the high-strength alloys.

KeywordVery-high-cycle fatigue Crack initiation Fine granular area (FGA) Rough area (RA) High-strength alloys
DOI10.1016/j.ijfatigue.2020.105473
Indexed BySCI ; EI
Language英语
WOS IDWOS:000518708500046
WOS KeywordTITANIUM-ALLOY ; FORMATION MECHANISM ; METALLIC MATERIALS ; STRESS RATIO ; EARLY GROWTH ; BEHAVIOR ; TI-6AL-4V ; STEEL ; LIFE ; PROPAGATION
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Mechanical ; Materials Science, Multidisciplinary
Funding ProjectNational Natural Science Foundation of China[11932020] ; National Natural Science Foundation of China[11572325] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22020201]
Funding OrganizationNational Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
Classification一类
Ranking1
Contributor洪友士
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81775
Collection非线性力学国家重点实验室
Corresponding AuthorZheng L; Hong YS(洪友士)
Affiliation1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
3.Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China
Recommended Citation
GB/T 7714
Chang YK,Pan XN,Zheng L,et al. Microstructure refinement and grain size distribution in crack initiation region of very-high-cycle fatigue regime for high-strength alloys[J]. INTERNATIONAL JOURNAL OF FATIGUE,2020,134:12.
APA Chang YK,Pan XN,Zheng L,&Hong YS.(2020).Microstructure refinement and grain size distribution in crack initiation region of very-high-cycle fatigue regime for high-strength alloys.INTERNATIONAL JOURNAL OF FATIGUE,134,12.
MLA Chang YK,et al."Microstructure refinement and grain size distribution in crack initiation region of very-high-cycle fatigue regime for high-strength alloys".INTERNATIONAL JOURNAL OF FATIGUE 134(2020):12.
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