| Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu | |
| You Zesheng1; Luo Shusen2; Lu Lei2 | |
| Corresponding Author | You Zesheng(zsyou@njust.edu.cn) ; Lu Lei(llu@imr.ac.cn) |
| 2020-05-11 | |
| Source Publication | SCIENCE CHINA-TECHNOLOGICAL SCIENCES
 |
| ISSN | 1674-7321 |
| Pages | 9 |
| Abstract | Herein, we fabricated a heterogeneous nanostructured Cu with deformation nanotwin bundles (NTBs) embedded in a matrix of nanograins by means of dynamic plastic deformation at liquid nitrogen temperature. We conducted fracture mechanical measurements to investigate the effect of longitudinal length of the NTBs on their strengthening and toughening. Results suggest that an increase in the NTB length had a marginal influence on the tensile strength; however, it remarkably promoted both fracture initiation toughness and crack growth toughness. Longer NTBs are more effective not only in intrinsically enhancing crack tip plasticity by suppressing the strain localization and void nucleation but also in serving as crack bridges behind the crack front to extrinsically resist the fracture by shielding the crack tip. |
| Keyword | fracture toughness nanotwins J-integral size effect toughening mechanism |
| Funding Organization | National Key R&D Program of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Science and the International Partnership Program ; Chinese Academy of Sciences ; Liaoning Revitalization Talents Program |
| DOI | 10.1007/s11431-020-1584-6 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key R&D Program of China[2017YFA0204403] ; National Natural Science Foundation of China[U1608257] ; National Natural Science Foundation of China[51931010] ; Key Research Program of Frontier Science and the International Partnership Program[GJHZ2029] ; Chinese Academy of Sciences ; Liaoning Revitalization Talents Program[XLYC1802026] |
| WOS Research Area | Engineering ; Materials Science |
| WOS Subject | Engineering, Multidisciplinary ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000532654000001 |
| Publisher | SCIENCE PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/138752 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | You Zesheng; Lu Lei |
| Affiliation | 1.Nanjing Univ Sci & Technol, Herbert Gleiter Inst Nanosci, Nanjing 210094, Peoples R China 2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | You Zesheng,Luo Shusen,Lu Lei. Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2020:9. |
| APA | You Zesheng,Luo Shusen,&Lu Lei.(2020).Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,9. |
| MLA | You Zesheng,et al."Size effect of deformation nanotwin bundles on their strengthening and toughening in heterogeneous nanostructured Cu".SCIENCE CHINA-TECHNOLOGICAL SCIENCES (2020):9. |
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