IMECH-IR  > 非线性力学国家重点实验室
Strength gradient enhances fatigue resistance of steels
Ma ZW(马知未); Liu JB; Wang G; Wang HT; Wei YJ(魏宇杰); Gao HJ; Wei, YJ (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Source PublicationSCIENTIFIC REPORTS
2016-02-24
Volume6Pages:22156
ISSN2045-2322
AbstractSteels are heavily used in infrastructure and the transportation industry, and enhancing their fatigue resistance is a major challenge in materials engineering. In this study, by introducing a gradient microstructure into 304 austenitic steel, which is one of the most widely used types of stainless steel, we show that a strength gradient substantially enhances the fatigue life of the material. Pre-notched samples with negative strength gradients in front of the notch's tip endure many more fatigue cycles than do samples with positive strength gradients during the crack initiation stage, and samples with either type of gradient perform better than do gradient-free samples with the same average yield strength. However, as a crack grows, samples with positive strength gradients exhibit better resistance to fatigue crack propagation than do samples with negative gradients or no gradient. This study demonstrates a simple and promising strategy for using gradient structures to enhance the fatigue resistance of materials and complements related studies of strength and ductility.
DOI10.1038/srep22156
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Indexed BySCI
Language英语
WOS IDWOS:000370773100001
WOS KeywordMOLECULAR-DYNAMICS ; SURFACE-TENSION ; BUBBLE
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
Funding OrganizationY.W. acknowledges support from the National Natural Science Foundation of China (NSFC) (Grant no. 11425211), and MOST 973 of China (Grant no. 2012CB937500), the Chinese Academy of Sciences, and. G. W. is grateful for support from the Shanghai Pujiang Program (Grant no. 11PJ1403900) and the Eastern Scholar Program at Shanghai Institutions of Higher Learning. H.W. and J.L. acknowledge support from the NSFC (Grant nos 11002124, 11202183, and 11572281). H.G. acknowledges financial support from the National Science Foundation through grant CMMI-1161749 and from the Center for Mechanics and Materials at Tsinghua University.
DepartmentLNM微结构计算力学(筹)
Classification一类
RankingTrue
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58665
Collection非线性力学国家重点实验室
Corresponding AuthorWei, YJ (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Ma ZW,Liu JB,Wang G,et al. Strength gradient enhances fatigue resistance of steels[J]. SCIENTIFIC REPORTS,2016,6:22156.
APA Ma ZW.,Liu JB.,Wang G.,Wang HT.,Wei YJ.,...&Wei, YJ .(2016).Strength gradient enhances fatigue resistance of steels.SCIENTIFIC REPORTS,6,22156.
MLA Ma ZW,et al."Strength gradient enhances fatigue resistance of steels".SCIENTIFIC REPORTS 6(2016):22156.
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