A universal scaling relationship between the strength and Young’s modulus of dealloyed porous Fe0.80Cr0.20

Xiang, Yi-Hou; Liu, Ling-Zhi; Shao, Jun-Chao; Jin, Hai-Jun

doi:10.1016/j.actamat.2019.12.046

Cited by 37 publications

(26 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Over more than a decade, the interpretation of experiments in the nanoporous metals community was based exclusively on the Gibson-Ashby scaling laws, which are based on ligament bending as the main deformation mechanism of open pore materials [7]. Until today, important insights are gained with the help of this model, which is robust and simple to use [14,78]. Over more than a decade, the interpretation of experiments in the nanoporous metals community was based exclusively on the Gibson-Ashby scaling laws, which are based on ligament bending as the main deformation mechanism of open pore materials [7].…”

Section: Micromechanical Modelingmentioning

confidence: 99%

“…x Ni 1−x in liquid Mg [14]. The samples of the same ligament size around 4 µm and very similar size distribution allow the comparison between Young's modulus and flow stress over a large range of solid fractions from ϕ = 0.2 to 0.45.…”

Section: Evolution Of Network Connectivity During Coarseningmentioning

confidence: 99%

“…Similarly, for the interpretation of the experimental data with Equations (1) and (2), we should keep in mind that for > 0.3 the free length of the ligament becomes less than the ligament thickness and that inaccuracies associated with the volumes of the nodes become severe [9]. [14] with the data from (a) Huber [80], Supplementary material, Data sheet 2, and (b) comparison with the data from Richert et al [53], Supplementary material, Tables S2 and S4 (thin dashed lines correspond to yield stress, thin solid lines are unpublished data and correspond to flow stress at 10% plastic strain). Slopes entered as numbers in the plots correspond to exponents / in the dependency ~/ .…”

Section: Evolution Of Network Connectivity During Coarseningmentioning

confidence: 99%

“…A significant amount of work went into the modification of the Gibson-Ashby scaling laws to integrate the phenomena observed in nanoporous metals. An overview of such modified scaling laws is given in [14].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Review of Experimentally Informed Micromechanical Modeling of Nanoporous Metals: From Structural Descriptors to Predictive Structure–Property Relationships

Richert

Huber

2020

Materials

View full text Add to dashboard Cite

Nanoporous metals made by dealloying take the form of macroscopic (mm- or cm-sized) porous bodies with a solid fraction of around 30%. The material exhibits a network structure of “ligaments” with an average ligament diameter that can be adjusted between 5 and 500 nm. Current research explores the use of nanoporous metals as functional materials with respect to electrochemical conversion and storage, bioanalytical and biomedical applications, and actuation and sensing. The mechanical behavior of the network structure provides the scope for fundamental research, particularly because of the high complexity originating from the randomness of the structure and the challenges arising from the nanosized ligaments, which can be accessed through an experiment only indirectly via the testing of the macroscopic properties. The strength of nanoscale ligaments increases systematically with decreasing size, and owing to the high surface-to-volume ratio their elastic and plastic properties can be additionally tuned by applying an electric potential. Therefore, nanoporous metals offer themselves as suitable model systems for exploring the structure–property relationships of complex interconnected microstructures as well as the basic mechanisms of the chemo-electro-mechanical coupling at interfaces. The micromechanical modeling of nanoporous metals is a rapidly growing field that strongly benefits from developments in computational methods, high-performance computing, and visualization techniques; it also benefits at the same time through advances in characterization techniques, including nanotomography, 3D image processing, and algorithms for geometrical and topological analysis. The review article collects articles on the structural characterization and micromechanical modeling of nanoporous metals and discusses the acquired understanding in the context of advancements in the experimental discipline. The concluding remarks are given in the form of a summary and an outline of future perspectives.

show abstract

Section: Micromechanical Modelingmentioning

confidence: 99%

Section: Evolution Of Network Connectivity During Coarseningmentioning

confidence: 99%

Section: Evolution Of Network Connectivity During Coarseningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Review of Experimentally Informed Micromechanical Modeling of Nanoporous Metals: From Structural Descriptors to Predictive Structure–Property Relationships

Richert

Huber

2020

Materials

View full text Add to dashboard Cite

show abstract

“…Recently, there have been some successful reports on fabrication of highly reactive non-noble mesoporous metals such as nanoporous aluminum [30]. In its turn, liquid metal dealloying has been used to fabricate a wide range of non-noble porous metals, including steels [31][32][33][34][35][36], titanium and titanium alloys [11,[37][38][39], zirconium [12], tantalum [40], and cobalt-chromium [41], among others, as well as non-metallic porous materials such as silicon [42] and carbon [43,44]. Particularly important is the recent progress in the development of highly reactive mesoporous metals such as nanoporous magnesium [45] as well as multicomponent complex alloys such as nanoporous high-entropy alloys [46] by liquid metal dealloying.…”

Section: Introductionmentioning

confidence: 99%

Surface Functionalization of Biomedical Ti-6Al-7Nb Alloy by Liquid Metal Dealloying

et al. 2020

View full text Add to dashboard Cite

Surface functionalization is an effective approach to change the surface properties of a material to achieve a specific goal such as improving the biocompatibility of the material. Here, the surface of the commercial biomedical Ti-6Al-7Nb alloy was functionalized through synthesizing of a porous surface layer by liquid metal dealloying (LMD). During LMD, the Ti-6Al-7Nb alloy is immersed in liquid magnesium (Mg) and both materials react with each other. Particularly, aluminum (Al) is selectively dissolved from the Ti-6Al-7Nb alloy into liquid Mg while titanium (Ti) and niobium (Nb) diffuse along the metal/liquid interface to form a porous structure. We demonstrate that the porous surface layer in the Ti-6Al-7Nb alloy can be successfully tailored by LMD. Furthermore, the concentration of harmful Al in this porous layer is reduced by about 48% (from 5.62 ± 0.11 wt.% to 2.95 ± 0.05 wt.%) after 30 min of dealloying at 1150 K. The properties of the porous layer (e.g., layer thickness) can be tuned by varying the dealloying conditions. In-vitro tests suggest improved bone formation on the functionalized porous surface of the Ti-6Al-7Nb alloy.

show abstract

Hierarchical Porous Monoliths of Steel with Self‐Reinforcing Adaptive Properties

et al. 2023

View full text Add to dashboard Cite

Porous structures offer an attractive approach to reduce the amount of natural resources used while maintaining relatively high mechanical efficiency. However, for some applications the drop in mechanical properties resulting from the introduction of porosity is too high, which has limited the broader utilization of porous materials in industry. Here, it is shown that steel monoliths can be designed to display high mechanical efficiency and reversible self‐reinforcing properties when made with porous architectures with up to three hierarchical levels. Ultralight steel structures that can float on water and autonomously adapt their stiffness are manufactured by the thermal reduction and sintering of 3D printed foam templates. Using distinct mechanical testing techniques, image analysis, and finite element simulations, the mechanisms leading to the high mechanical efficiency and self‐stiffening ability of the hierarchical porous monoliths are studied. The design and fabrication of mechanically stable porous monoliths using iron as a widely available natural resource is expected to contribute to the future development of functional materials with a more sustainable footprint.

show abstract

A universal scaling relationship between the strength and Young’s modulus of dealloyed porous Fe0.80Cr0.20

Cited by 37 publications

References 61 publications

A Review of Experimentally Informed Micromechanical Modeling of Nanoporous Metals: From Structural Descriptors to Predictive Structure–Property Relationships

A Review of Experimentally Informed Micromechanical Modeling of Nanoporous Metals: From Structural Descriptors to Predictive Structure–Property Relationships

Surface Functionalization of Biomedical Ti-6Al-7Nb Alloy by Liquid Metal Dealloying

Hierarchical Porous Monoliths of Steel with Self‐Reinforcing Adaptive Properties

Contact Info

Product

Resources

About