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The Minimum Energy Density Criterion for the Competition between Shear and Flat Fracture
Li, He Fei1,2; Zhang, Peng1,2; Qu, Rui Tao1; Zhang, Zhe Feng1
Corresponding AuthorZhang, Peng(pengzhang@imr.ac.cn) ; Zhang, Zhe Feng(zhfzhang@imr.ac.cn)
2018-08-01
Source PublicationADVANCED ENGINEERING MATERIALS
ISSN1438-1656
Volume20Issue:8Pages:9
AbstractIt is generally recognized that the fracture toughness K-IC of materials represents the crack resistance during fracture, i.e., the energy consumption. In this study, AISI 4340 steels with different strength are applied to systematically investigate the intrinsic mechanism of fracture toughness. It is found that the fracture surface morphologies of AISI 4340 steels change from quasi-cleavage fracture to dimple fracture with increasing the tempering temperature. While, the specimen size has almost no effect on the fracture mechanism of shear/flat fracture region, demonstrating that the fracture toughness depends on the proportion of shear and flat fracture region. Additionally, the shear lip width of the K-IC specimen will increase to a constant value with enhancing the specimen thickness. Based on the energy balance principle, the maximum shear lip width can be obtained at the minimum fracture energy density of materials; consequently, there is an essential relationship between the shear fracture and fracture toughness, i.e., the minimum energy density criterion. The new finding, which provides a scaling law to well evaluate the plane strain fracture toughness of new materials with high toughness (e.g., nanostructured materials and metallic glasses), may broad the understandings on the fracture toughness.
KeywordFlat fracture Fracture toughness High strength steel Minimum energy density criterion Shear fracture
Funding OrganizationNational Natural Science Foundation of China (NSFC)
DOI10.1002/adem.201800150
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[51331007] ; National Natural Science Foundation of China (NSFC)[51771208] ; National Natural Science Foundation of China (NSFC)[51771205] ; National Natural Science Foundation of China (NSFC)[U1664253]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000440898100027
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/128799
Collection中国科学院金属研究所
Corresponding AuthorZhang, Peng; Zhang, Zhe Feng
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Li, He Fei,Zhang, Peng,Qu, Rui Tao,et al. The Minimum Energy Density Criterion for the Competition between Shear and Flat Fracture[J]. ADVANCED ENGINEERING MATERIALS,2018,20(8):9.
APA Li, He Fei,Zhang, Peng,Qu, Rui Tao,&Zhang, Zhe Feng.(2018).The Minimum Energy Density Criterion for the Competition between Shear and Flat Fracture.ADVANCED ENGINEERING MATERIALS,20(8),9.
MLA Li, He Fei,et al."The Minimum Energy Density Criterion for the Competition between Shear and Flat Fracture".ADVANCED ENGINEERING MATERIALS 20.8(2018):9.
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