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DOI | 10.1038/s41467-019-08742-9 |
Dislocation mechanisms and 3D twin architectures generate exceptional strength-ductility-toughness combination in CrCoNi medium-entropy alloy | |
Zhang, Zijiao1,2; Sheng, Hongwei3; Wang, Zhangjie4; Gludovatz, Bernd5; Zhang, Ze1,2; George, Easo P.6; Yu, Qian1,2; Mao, Scott X.1,2,7; Ritchie, Robert O.5,8 | |
2019-02-15 | |
发表期刊 | NATURE COMMUNICATIONS |
ISSN | 2041-1723 |
出版年 | 2017 |
卷号 | 8 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Combinations of high strength and ductility are hard to attain in metals. Exceptions include materials exhibiting twinning-induced plasticity. To understand how the strength-ductility trade-off can be defeated, we apply in situ, and aberration-corrected scanning, transmission electron microscopy to examine deformation mechanisms in the medium-entropy alloy CrCoNi that exhibits one of the highest combinations of strength, ductility and toughness on record. Ab initio modelling suggests that it has negative stacking-fault energy at 0K and high propensity for twinning. With deformation we find that a three-dimensional (3D) hierarchical twin network forms from the activation of three twinning systems. This serves a dual function: conventional twin-boundary (TB) strengthening from blockage of dislocations impinging on TBs, coupled with the 3D twin network which offers pathways for dislocation glide along, and cross-slip between, intersecting TB-matrix interfaces. The stable twin architecture is not disrupted by interfacial dislocation glide, serving as a continuous source of strength, ductility and toughness. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394455900001 |
WOS关键词 | STACKING-FAULT ENERGY ; STRAIN-RATE SENSITIVITY ; INITIO MOLECULAR-DYNAMICS ; SOLID-SOLUTION ALLOYS ; DEFORMATION-BEHAVIOR ; NANOTWINNED COPPER ; TENSILE PROPERTIES ; DAMAGE-TOLERANCE ; GRAIN-BOUNDARIES ; NANOSCALE TWINS |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204226 |
专题 | 资源环境科学 |
作者单位 | 1.Zhejiang Univ, Ctr Electron Microscopy, Dept Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China; 2.Zhejiang Univ, Dept Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Zhejiang, Peoples R China; 3.George Mason Univ, Dept Phys & Astron, Fairfax, VA 22030 USA; 4.Xi An Jiao Tong Univ, Dept Mat Sci & Engn, Xian 710049, Peoples R China; 5.Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA; 6.Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA; 7.Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA; 8.Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA |
推荐引用方式 GB/T 7714 | Zhang, Zijiao,Sheng, Hongwei,Wang, Zhangjie,et al. Dislocation mechanisms and 3D twin architectures generate exceptional strength-ductility-toughness combination in CrCoNi medium-entropy alloy[J]. NATURE COMMUNICATIONS,2019,8. |
APA | Zhang, Zijiao.,Sheng, Hongwei.,Wang, Zhangjie.,Gludovatz, Bernd.,Zhang, Ze.,...&Ritchie, Robert O..(2019).Dislocation mechanisms and 3D twin architectures generate exceptional strength-ductility-toughness combination in CrCoNi medium-entropy alloy.NATURE COMMUNICATIONS,8. |
MLA | Zhang, Zijiao,et al."Dislocation mechanisms and 3D twin architectures generate exceptional strength-ductility-toughness combination in CrCoNi medium-entropy alloy".NATURE COMMUNICATIONS 8(2019). |
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