The toughening effect of twins on fracture in nanotwinned Cu during cyclic loading
文献类型：期刊论文
| 作者 | He, S. Y.1; Jiang, B. B.1; Lu, N.1; Chen, C. J.1; Cui, J. P.1; Huang, Z. Y.1; Jin, S.1; Ye, H. Q.1,2; Lu, L.1; Du, K.1 |
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2024-10-01 |
| 卷号 | 278页码:15 |
| 关键词 | Transmission electron microscopy Microstructure Nanotwins Toughness Fatigue crack |
| ISSN号 | 1359-6454 |
| DOI | 10.1016/j.actamat.2024.120232 |
| 通讯作者 | Jiang, B. B.(bbjiang12s@imr.ac.cn) ; Du, K.(kuidu@imr.ac.cn) |
| 英文摘要 | Extensive studies have been focused on improving the fatigue performance of materials, as fatigue fracture is a primary mode of failure in material applications for structural components. The introduction of high-density twins emerges as a novel strategy for enhancing fracture toughness; however, the mechanisms driving this enhancement during fatigue remain elusive. In this work, the impact of twins on fracture toughness in nanotwinned Cu was investigated with correlated transmission electron microscopy under cyclic loading. The results revealed three toughening mechanisms, i.e., bridging, bending of twin lamellae and ductile cracking along twin boundaries. The occurrence of the three toughening mechanisms strongly depends on twin thickness and cracking orientations, as different dislocation modes are activated in varying scenarios. Specifically, bridging and ductile cracking along twin boundaries are facilitated by the pile-up and continuous emission of hard mode I dislocations, respectively, while the bending of twin lamellae is governed by the accumulation of same-signed soft mode dislocations triggered by crack-tip stress. These findings unveil the underlying toughening mechanisms of twins in nanotwinned metals during cyclic loading and offer valuable guidance for the design of hightoughness nanolayered materials. |
| 资助项目 | Key Research Program of Frontier Sciences of Chinese Academy of Sciences[QYZDJ-SSW-JSC024] ; Na-tional Natural Science Foundation of China[91960202] ; Na-tional Natural Science Foundation of China[52171020] ; Na-tional Natural Science Foundation of China[51901229] ; Guangxi Key Research and Development Plan[AA23023030] ; Natural Science Foundation of Liaoning Province[2024-MSBA-69] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001294266700001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | Key Research Program of Frontier Sciences of Chinese Academy of Sciences ; Na-tional Natural Science Foundation of China ; Guangxi Key Research and Development Plan ; Natural Science Foundation of Liaoning Province |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Jiang, B. B.; Du, K. |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Ji Hua Lab, Foshan 528200, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, S. Y.,Jiang, B. B.,Lu, N.,et al. The toughening effect of twins on fracture in nanotwinned Cu during cyclic loading[J]. ACTA MATERIALIA,2024,278:15. |
| APA | He, S. Y..,Jiang, B. B..,Lu, N..,Chen, C. J..,Cui, J. P..,...&Du, K..(2024).The toughening effect of twins on fracture in nanotwinned Cu during cyclic loading.ACTA MATERIALIA,278,15. |
| MLA | He, S. Y.,et al."The toughening effect of twins on fracture in nanotwinned Cu during cyclic loading".ACTA MATERIALIA 278(2024):15. |
入库方式： OAI收割
来源：金属研究所
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