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Transition from Homogeneous to Localized Deformation in Nanoporous Gold
Liu, Ling-Zhi1; Zhang, Ye-Yuan1,2; Xie, Hui1; Jin, Hai-Jun1
Corresponding AuthorJin, Hai-Jun(hjjin@imr.ac.cn)
2021-08-24
Source PublicationPHYSICAL REVIEW LETTERS
ISSN0031-9007
Volume127Issue:9Pages:7
AbstractWe 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 OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China
DOI10.1103/PhysRevLett.127.095501
Indexed BySCI
Languageen
Funding ProjectNational Key R&D Program of China[2017YFA0204401] ; National Natural Science Foundation of China[51971218] ; National Natural Science Foundation of China[52001316]
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000688553600005
PublisherAMER PHYSICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/159268
Collection中国科学院金属研究所
Corresponding AuthorJin, Hai-Jun
Affiliation1.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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