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 | |
发表期刊 | METALS |
2022-04-01 | |
卷号 | 12期号:4页码:12 |
摘要 | In 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. |
关键词 | G20Mn5QT steel crack initiation mechanism fatigue strength size effect shape effect |
DOI | 10.3390/met12040652 |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000787514000001 |
关键词[WOS] | CRACK-GROWTH-BEHAVIOR ; HIGH-CYCLE FATIGUE ; RAILWAY AXLES ; SPECIMEN SIZE ; STRESS ; LIFE |
WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
WOS类目 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
资助项目 | National Key Research and Development Program of China[2017YFB0304600] |
项目资助者 | National Key Research and Development Program of China |
论文分区 | 二类 |
力学所作者排名 | 1 |
RpAuthor | Sun, Chengqi |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/89019 |
专题 | 非线性力学国家重点实验室 |
作者单位 | 1.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 |
推荐引用方式 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,Wu H,&Sun CQ.(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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