Transition from Homogeneous to Localized Deformation in Nanoporous Gold
文献类型：期刊论文
| 作者 | Liu, Ling-Zhi1; Zhang, Ye-Yuan1,2; Xie, Hui1; Jin, Hai-Jun1 |
| 刊名 | PHYSICAL REVIEW LETTERS
 |
| 出版日期 | 2021-08-24 |
| 卷号 | 127期号:9页码:7 |
| ISSN号 | 0031-9007 |
| DOI | 10.1103/PhysRevLett.127.095501 |
| 通讯作者 | Jin, Hai-Jun(hjjin@imr.ac.cn) |
| 英文摘要 | We report a transition from homogeneous deformation to localized densification for nanoporous gold (NPG) under compression, with its solid fraction (phi) increasing to above similar to 1/3. Results obtained herein suggest that this transition is inverted compared to that of conventional porous materials. Consequently, under compression, the low-density NPGs with phi < 1/3 showed evident strain hardening, whereas a stress plateau was observed for high-density NPGs with phi > 1/3, which is contrary to the established notions for conventional porous materials. The ligament pinch-offs and bending-dominated structures are responsible for the homogeneous deformation of low-density NPGs. For high-density NPGs, the compression- or tension-dominated structure enables the collective strain bursts in nanoligaments, resulting in localized densification and stress plateau in their compression curves. In addition to the nanosize effect, the surface-diffusion-mediated topology evolution and the large-scale crystal-lattice coherency arising from the large grain size are also decisive to the mechanical response of dealloyed NPGs, which might be universal for self-organized nanonetwork materials. |
| 资助项目 | National Key R&D Program of China[2017YFA0204401] ; National Natural Science Foundation of China[51971218] ; National Natural Science Foundation of China[52001316] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000688553600005 |
| 出版者 | AMER PHYSICAL SOC |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/159267]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Jin, Hai-Jun |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Ling-Zhi,Zhang, Ye-Yuan,Xie, Hui,et al. Transition from Homogeneous to Localized Deformation in Nanoporous Gold[J]. PHYSICAL REVIEW LETTERS,2021,127(9):7. |
| APA | Liu, Ling-Zhi,Zhang, Ye-Yuan,Xie, Hui,&Jin, Hai-Jun.(2021).Transition from Homogeneous to Localized Deformation in Nanoporous Gold.PHYSICAL REVIEW LETTERS,127(9),7. |
| MLA | Liu, Ling-Zhi,et al."Transition from Homogeneous to Localized Deformation in Nanoporous Gold".PHYSICAL REVIEW LETTERS 127.9(2021):7. |
入库方式： OAI收割
来源：金属研究所
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