Size and Shape Effects on Fatigue Behavior of G20Mn5QT Steel from Axle Box Bodies in High-Speed Trains

doi:10.3390/met12040652

CORC > 力学研究所 > 中国科学院力学研究所 > 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, Zhenxian 3; Li, Zhongwen 3; Wu, Han 1,2; Sun, Chengqi 1,2
刊名	METALS
	2022-04-01
卷号	12 期号:4 页码:12
关键词	G20Mn5QT steel crack initiation mechanism fatigue strength size effect shape effect
DOI	10.3390/met12040652
通讯作者	Sun, Chengqi(scq@lnm.imech.ac.cn)
英文摘要	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.
资助项目	National Key Research and Development Program of China[2017YFB0304600]
WOS关键词	CRACK-GROWTH-BEHAVIOR ; HIGH-CYCLE FATIGUE ; RAILWAY AXLES ; SPECIMEN SIZE ; STRESS ; LIFE
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000787514000001
资助机构	National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89018]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Sun, Chengqi
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 3.CRRC Qingdao Sifang Co Ltd, Qingdao 266111, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhenxian,Li, Zhongwen,Wu, Han,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, Han,&Sun, Chengqi.(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.