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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
Corresponding AuthorPang, J. C.(jcpang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
2022-08-01
Source PublicationINTERNATIONAL JOURNAL OF FATIGUE
ISSN0142-1123
Volume161Pages:9
AbstractThe 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.
KeywordCompacted graphite iron Microstructure High-cycle fatigue Fracture mechanism Fatigue strength prediction
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; LiaoNing Revitalization Talents Program
DOI10.1016/j.ijfatigue.2022.106881
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[51871224] ; LiaoNing Revitalization Talents Program[XLYC1808027]
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Mechanical ; Materials Science, Multidisciplinary
WOS IDWOS:000793126100001
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/173897
Collection中国科学院金属研究所
Corresponding AuthorPang, J. C.; Zhang, Z. F.
Affiliation1.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
Recommended Citation
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.
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