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Revealing the Maximum Strength in Nanotwinned Copper
文献类型：期刊论文
| 作者 | L. Lu ; X. Chen ; X. Huang ; K. Lu |
| 刊名 | Science
 |
| 出版日期 | 2009 |
| 卷号 | 323期号:5914页码:607-610 |
| 关键词 | strain-rate sensitivity coherent twin boundaries centered-cubic metals nanocrystalline copper nanostructured metals mechanical-properties tensile properties dislocations deformation cu |
| ISSN号 | 0036-8075 |
| 中文摘要 | The strength of polycrystalline materials increases with decreasing grain size. Below a critical size, smaller grains might lead to softening, as suggested by atomistic simulations. The strongest size should arise at a transition in deformation mechanism from lattice dislocation activities to grain boundary- related processes. We investigated the maximum strength of nanotwinned copper samples with different twin thicknesses. We found that the strength increases with decreasing twin thickness, reaching a maximum at 15 nanometers, followed by a softening at smaller values that is accompanied by enhanced strain hardening and tensile ductility. The strongest twin thickness originates from a transition in the yielding mechanism from the slip transfer across twin boundaries to the activity of preexisting easy dislocation sources. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/32152]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | L. Lu,X. Chen,X. Huang,et al. Revealing the Maximum Strength in Nanotwinned Copper[J]. Science,2009,323(5914):607-610. |
| APA | L. Lu,X. Chen,X. Huang,&K. Lu.(2009).Revealing the Maximum Strength in Nanotwinned Copper.Science,323(5914),607-610. |
| MLA | L. Lu,et al."Revealing the Maximum Strength in Nanotwinned Copper".Science 323.5914(2009):607-610. |
入库方式： OAI收割
来源：金属研究所
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