| Revealing Extraordinary Intrinsic Tensile Plasticity in Gradient Nano-Grained Copper | |
| T. H. Fang; W. L. Li; N. R. Tao; K. Lu | |
| 2011 | |
| 发表期刊 | Science
 |
| ISSN | 0036-8075 |
| 卷号 | 331期号:6024页码:1587-1590 |
| 摘要 | Nano-grained (NG) metals are believed to be strong but intrinsically brittle: Free-standing NG metals usually exhibit a tensile uniform elongation of a few percent. When a NG copper film is confined by a coarse-grained (CG) copper substrate with a gradient grain-size transition, tensile plasticity can be achieved in the NG film where strain localization is suppressed. The gradient NG film exhibits a 10 times higher yield strength and a tensile plasticity comparable to that of the CG substrate and can sustain a tensile true strain exceeding 100% without cracking. A mechanically driven grain boundary migration process with a substantial concomitant grain growth dominates plastic deformation of the gradient NG structure. The extraordinary intrinsic plasticity of gradient NG structures offers their potential for use as advanced coatings of bulk materials. |
| 部门归属 | [fang, t. h.; li, w. l.; tao, n. r.; lu, k.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;lu, k (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;lu@imr.ac.cn |
| 关键词 | Nanostructured Surface-layer Room-temperature Nanocrystalline Materials Boundary Motion Deformation Growth Metal Films Cu Ductility |
| URL | 查看原文 |
| WOS记录号 | WOS:000288754500050 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/30314 |
| 专题 | 中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | T. H. Fang,W. L. Li,N. R. Tao,et al. Revealing Extraordinary Intrinsic Tensile Plasticity in Gradient Nano-Grained Copper[J]. Science,2011,331(6024):1587-1590. |
| APA | T. H. Fang,W. L. Li,N. R. Tao,&K. Lu.(2011).Revealing Extraordinary Intrinsic Tensile Plasticity in Gradient Nano-Grained Copper.Science,331(6024),1587-1590. |
| MLA | T. H. Fang,et al."Revealing Extraordinary Intrinsic Tensile Plasticity in Gradient Nano-Grained Copper".Science 331.6024(2011):1587-1590. |
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