Crack propagation mechanisms of AISI 4340 steels with different strength and toughness
文献类型：期刊论文
| 作者 | Li, H. F.1,2; Wang, S. G.2; Zhang, P.2; Qu, R. T.2; Zhang, Z. F.1,2 |
| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2018-06-27 |
| 卷号 | 729页码:130-140 |
| ISSN号 | 0921-5093 |
| 关键词 | Crack propagation X-ray tomography Fracture toughness Cleavage fracture Void growth and coalescence |
| DOI | 10.1016/j.msea.2018.05.056 |
| 通讯作者 | Zhang, P.(pengzhang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn) |
| 英文摘要 | In this paper, the crack propagation characteristics in AISI 4340 steel with different strength and toughness have been investigated in quasi-situ via 3D X-ray tomography during fracture toughness testing. Three kinds of crack propagation characteristics were observed by the 3D image analysis, which were determined by the competition between cleavage fracture and voids growth/coalescence. It is found that the main crack would connect the micro-voids near the crack tip by cleavage fracture if the local stress achieves the cleavage fracture strength, resulting in rapid crack propagation. However, the growth and coalescence of micro-voids ahead of the crack tip would be linked with the main crack by strain-controlled, leading to the ductile fracture. The above two mechanisms would exist simultaneously in materials, which might be explained by the competition balance between strain and stress. Studying on transition of crack propagation mechanisms in materials would further understand the essence of fracture toughness. It will provide new insight into the fracture behavior of engineering materials and some new materials such as nanostructured materials and metallic glasses. Additionally, based on the energy principle, we propose a quantitative relationship between the microscope fracture surface morphology and fracture toughness of materials. |
| 资助项目 | 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研究方向 | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE SA |
| WOS记录号 | WOS:000439675100016 |
| 资助机构 | National Natural Science Foundation of China (NSFC) |
| 源URL | [http://ir.imr.ac.cn/handle/321006/128952]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Zhang, P.; Zhang, Z. F. |
| 作者单位 | 1.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, H. F.,Wang, S. G.,Zhang, P.,et al. Crack propagation mechanisms of AISI 4340 steels with different strength and toughness[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2018,729:130-140. |
| APA | Li, H. F.,Wang, S. G.,Zhang, P.,Qu, R. T.,&Zhang, Z. F..(2018).Crack propagation mechanisms of AISI 4340 steels with different strength and toughness.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,729,130-140. |
| MLA | Li, H. F.,et al."Crack propagation mechanisms of AISI 4340 steels with different strength and toughness".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 729(2018):130-140. |
入库方式： OAI收割
来源：金属研究所
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