| 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 Author | Zhang, Peng(pengzhang@imr.ac.cn) ; Zhang, Zhe Feng(zhfzhang@imr.ac.cn) |
| 2018-08-01 | |
| Source Publication | ADVANCED ENGINEERING MATERIALS
 |
| ISSN | 1438-1656 |
| Volume | 20Issue:8Pages:9 |
| Abstract | It 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. |
| Keyword | Flat fracture Fracture toughness High strength steel Minimum energy density criterion Shear fracture |
| Funding Organization | National Natural Science Foundation of China (NSFC) |
| DOI | 10.1002/adem.201800150 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National 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 Area | Materials Science |
| WOS Subject | Materials Science, Multidisciplinary |
| WOS ID | WOS:000440898100027 |
| Publisher | WILEY-V C H VERLAG GMBH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/128799 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhang, Peng; Zhang, Zhe Feng |
| Affiliation | 1.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. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment