Atomistic scale fracture behaviours in hierarchically nanotwinned metals
文献类型：期刊论文
| 作者 | Yuan FP(袁福平) ; Wu XL(武晓雷)
|
| 刊名 | PHILOSOPHICAL MAGAZINE
 |
| 出版日期 | 2013-08-01 |
| 卷号 | 93期号:24页码:3248-3259 |
| 通讯作者邮箱 | fpyuan@lnm.imech.ac.cn |
| 关键词 | molecular dynamics simulations fracture crack growth twins hierarchically nanotwinned structures |
| ISSN号 | 1478-6435 |
| 产权排序 | [Yuan, Fuping; Wu, Xiaolei] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 通讯作者 | Yuan, FP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. |
| 中文摘要 | In the present study, a series of large-scale molecular dynamics simulations have been performed to investigate the atomistic scale fracture behaviours along the boundaries of primary twins in Cu with hierarchically nanotwinned structures (HTS), and compare their fracture behaviours with those in monolithic twins. The results indicate that crack propagation along [112] on the twin plane in monolithic nanotwins is brittle cleavage and fracture, resulting in low crack resistance and fracture toughness. However, the crack resistance along the boundaries of primary twins in HTS is much higher, and a smaller spacing of secondary twins (λ2) leads to even higher fracture toughness. With large λ2, the crack growth is achieved by void nucleation, growth and coalescence. However, considerable plastic deformation and enhanced fracture toughness in HTS could be achieved by the crack blunting and by the extensive dislocation accommodation ahead of the crack tip when λ2 is small. |
| 学科主题 | 损伤、破坏机理和微结构演化 |
| 分类号 | 一类 |
| 收录类别 | SCI ; EI |
| 资助信息 | National Key Basic Research Program of China [2012CB932203, 2012CB937500]; NSFC [11002151, 11222224, 11072243, 11021262] |
| 原文出处 | http://dx.doi.org/10.1080/14786435.2013.805278 |
| 语种 | 英语 |
| WOS记录号 | WOS:000323633100002 |
| 公开日期 | 2013-09-27 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/47457]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Yuan FP,Wu XL. Atomistic scale fracture behaviours in hierarchically nanotwinned metals[J]. PHILOSOPHICAL MAGAZINE,2013,93(24):3248-3259. |
| APA | Yuan FP,&Wu XL.(2013).Atomistic scale fracture behaviours in hierarchically nanotwinned metals.PHILOSOPHICAL MAGAZINE,93(24),3248-3259. |
| MLA | Yuan FP,et al."Atomistic scale fracture behaviours in hierarchically nanotwinned metals".PHILOSOPHICAL MAGAZINE 93.24(2013):3248-3259. |
入库方式： OAI收割
来源：力学研究所
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