IMECH-IR  > 非线性力学国家重点实验室
Size and Shape Effects on Fatigue Behavior of G20Mn5QT Steel from Axle Box Bodies in High-Speed Trains
Zhang, Zhenxian1; Li, Zhongwen1; Wu H(仵涵)2,3; Sun CQ(孙成奇)2,3
Corresponding AuthorSun, Chengqi(scq@lnm.imech.ac.cn)
Source PublicationMETALS
2022-04-01
Volume12Issue:4Pages:12
AbstractIn this paper, the axial loading fatigue tests are at first conducted on specimens ofG20Mn5QT steel from axle box bodies in high-speed trains. Then, the size and shape effects on fatigue behavior are investigated. It is shown that the specimen size and shape have an influence on the fatigue performance of G20Mn5QT steel. The fatigue strength of the hourglass specimen is higher than that of the dogbone specimen due to its relatively smaller highly stressed region. Scanning electron microscope observation of the fracture surface and energy dispersive X-ray spectroscopy indicate that the specimen size and shape have no influence on the fatigue crack initiation mechanism. Fatigue cracks initiate from the surface or subsurface of the specimen, and some fracture surfaces present the characteristic of multi-site crack initiation. Most of the fatigue cracks initiate from the pore defects and alumina inclusions in the casting process, in which the pore defects are the main crack origins. The results also indicate that the probabilistic control volume method could be used for correlating the effects of specimen size and shape o the fatigue performance of G20Mn5QT steel for axle box bodies in high-speed trains.
KeywordG20Mn5QT steel crack initiation mechanism fatigue strength size effect shape effect
DOI10.3390/met12040652
Indexed BySCI ; EI
Language英语
WOS IDWOS:000787514000001
WOS KeywordCRACK-GROWTH-BEHAVIOR ; HIGH-CYCLE FATIGUE ; RAILWAY AXLES ; SPECIMEN SIZE ; STRESS ; LIFE
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding ProjectNational Key Research and Development Program of China[2017YFB0304600]
Funding OrganizationNational Key Research and Development Program of China
Classification二类
Ranking1
ContributorSun, Chengqi
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/89019
Collection非线性力学国家重点实验室
Affiliation1.CRRC Qingdao Sifang Co Ltd, Qingdao 266111, Peoples R China;
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Zhenxian,Li, Zhongwen,Wu H,et al. Size and Shape Effects on Fatigue Behavior of G20Mn5QT Steel from Axle Box Bodies in High-Speed Trains[J]. METALS,2022,12(4):12.
APA Zhang, Zhenxian,Li, Zhongwen,仵涵,&孙成奇.(2022).Size and Shape Effects on Fatigue Behavior of G20Mn5QT Steel from Axle Box Bodies in High-Speed Trains.METALS,12(4),12.
MLA Zhang, Zhenxian,et al."Size and Shape Effects on Fatigue Behavior of G20Mn5QT Steel from Axle Box Bodies in High-Speed Trains".METALS 12.4(2022):12.
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