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Characteristic of interior crack initiation and early growth for high cycle and very high cycle fatigue of a martensitic stainless steel
孙成奇i; Song QY(宋庆元); Zhou LL(周玲玲); Pan XN(潘向南)
Corresponding AuthorSun, Chengqi(scq@lnm.imech.ac.cn)
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
2019-06-05
Volume758Pages:112-120
ISSN0921-5093
AbstractIn this paper, interior crack initiation and early growth are investigated to determine the high cycle and very high cycle fatigue of a martensitic stainless steel by constant and variable amplitude loading fatigue tests. It is shown that the tested material presents a very large fine granular area (FGA) size (72-176 mu m), and the value of the stress intensity factor range for FGA remains almost constant irrespective of the stress amplitude and the fatigue life. The equivalent crack growth rate in FGA is of the magnitude 10(-13)-10(-11) m/cyc as determined by the "tree ring" patterns on the fracture surface under variable amplitude loading. Moreover, transmission electron microscopy shows both refined and coarse grains in the extracted samples beneath the FGA, i.e., there is no inevitable relationship between FGA morphology and refined grains beneath the FGA. Additionally, multi-site crack origins are observed under both constant and variable amplitude loadings. This indicates that the crack tends to initiate from the larger inclusion in the highly stressed region for the inclusion-induced fatigue failure.
KeywordVery high cycle fatigue Crack initiation Crack growth rate Grain refinement Multi-site crack initiation
DOI10.1016/j.msea.2019.04.015
Indexed BySCI ; EI
Language英语
WOS IDWOS:000471737800015
WOS KeywordHIGH-STRENGTH STEELS ; LIFE ; MECHANISM ; PROPAGATION ; PREDICTION ; BEHAVIOR ; MODEL
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding ProjectNational Natural Science Foundation of China[91860112] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22020200] ; Innovation Program[237099000000170004]
Funding OrganizationNational Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Innovation Program
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79374
Collection非线性力学国家重点实验室
Recommended Citation
GB/T 7714
孙成奇i,Song QY,Zhou LL,et al. Characteristic of interior crack initiation and early growth for high cycle and very high cycle fatigue of a martensitic stainless steel[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,758:112-120.
APA 孙成奇i,宋庆元,周玲玲,&潘向南.(2019).Characteristic of interior crack initiation and early growth for high cycle and very high cycle fatigue of a martensitic stainless steel.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,758,112-120.
MLA 孙成奇i,et al."Characteristic of interior crack initiation and early growth for high cycle and very high cycle fatigue of a martensitic stainless steel".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 758(2019):112-120.
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