| Transition from Homogeneous to Localized Deformation in Nanoporous Gold | |
| Liu, Ling-Zhi1; Zhang, Ye-Yuan1,2; Xie, Hui1; Jin, Hai-Jun1 | |
| Corresponding Author | Jin, Hai-Jun(hjjin@imr.ac.cn) |
| 2021-08-24 | |
| Source Publication | PHYSICAL REVIEW LETTERS
 |
| ISSN | 0031-9007 |
| Volume | 127Issue:9Pages:7 |
| Abstract | 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. |
| Funding Organization | National Key R&D Program of China ; National Natural Science Foundation of China |
| DOI | 10.1103/PhysRevLett.127.095501 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Key R&D Program of China[2017YFA0204401] ; National Natural Science Foundation of China[51971218] ; National Natural Science Foundation of China[52001316] |
| WOS Research Area | Physics |
| WOS Subject | Physics, Multidisciplinary |
| WOS ID | WOS:000688553600005 |
| Publisher | AMER PHYSICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/159268 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Jin, Hai-Jun |
| Affiliation | 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 |
| Recommended Citation 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. |
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