<p>The high-cycle fatigue fracture mechanism and fatigue strength prediction of compacted graphite iron</p>

doi:10.1016/j.ijfatigue.2022.106881

IMR OpenIR

	The high-cycle fatigue fracture mechanism and fatigue strength prediction of compacted graphite iron
	Zou, C. L.1; Pang, J. C.1; Qiu, Y.1; Liu, R.1; Li, S. X.1; Jing, G. X.2,3; Xu, C. G.2; Zhang, Z. F.1
通讯作者	Pang, J. C.(jcpang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
	2022-08-01
发表期刊	INTERNATIONAL JOURNAL OF FATIGUE
ISSN	0142-1123
卷号	161 页码:9
摘要	The tensile properties, high-cycle fatigue (HCF) properties and corresponding fatigue fracture mechanism of compacted graphite iron (CGI) were investigated. It is found that the tensile strength, yield strength and fatigue strength of CGI decrease as the temperature increases. At 25 ?, the fatigue cracks of CGI are mainly caused by local cleavage fracture at ferrite around the tip of vermicular graphite. At 400 ?& nbsp;and 500 ?, the gradual occurrence of grain boundary softening and oxidation may reduce the difficulty of fatigue crack propagation. Similar to temperature, the change of microstructure content also has a significant effect on the fatigue properties of CGI. By analyzing the damage characteristics of fatigue fracture morphology, it is shown that the fatigue crack initiation of CGI is mainly dependent on the damage localization caused by the ferrite and vermicular graphite inside the graphite cluster and the pearlite and spheroidal graphite outside the graphite cluster under cyclic loading. Based on those results, a fatigue strength prediction model associated with tensile strength, yield strength and microstructure area percentage was proposed. This model can provide a reasonable prediction of HCF strength of CGI at different temperatures.
关键词	Compacted graphite iron Microstructure High-cycle fatigue Fracture mechanism Fatigue strength prediction
资助者	National Natural Science Foundation of China (NSFC) ; LiaoNing Revitalization Talents Program
DOI	10.1016/j.ijfatigue.2022.106881
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[51871224] ; LiaoNing Revitalization Talents Program[XLYC1808027]
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary
WOS记录号	WOS:000793126100001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/173897
专题	中国科学院金属研究所
通讯作者	Pang, J. C.; Zhang, Z. F.
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.China North Engine Res Inst, 96 Yongjin Rd, Tianjin 300400, Peoples R China 3.Hebei Univ Technol, Tianjin Key Lab Power Transmiss & Safety Technol, Xiping Rd 5340, Tianjin 300401, Peoples R China
推荐引用方式 GB/T 7714	Zou, C. L.,Pang, J. C.,Qiu, Y.,et al. The high-cycle fatigue fracture mechanism and fatigue strength prediction of compacted graphite iron [J]. INTERNATIONAL JOURNAL OF FATIGUE,2022,161:9.
APA	Zou, C. L..,Pang, J. C..,Qiu, Y..,Liu, R..,Li, S. X..,...&Zhang, Z. F..(2022). The high-cycle fatigue fracture mechanism and fatigue strength prediction of compacted graphite iron .INTERNATIONAL JOURNAL OF FATIGUE,161,9.
MLA	Zou, C. L.,et al." The high-cycle fatigue fracture mechanism and fatigue strength prediction of compacted graphite iron ".INTERNATIONAL JOURNAL OF FATIGUE 161(2022):9.