Proposal of Method of Removal of Mould Material from the Fine Structure of Metallic Foams used as Filters

Kroupová, Ivana; Bednářová, Vlasta; Elbel, T.; Radkovský, Filip

doi:10.2478/amm-2014-0120

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…Their specific internal structure gives them a very convenient combination of physical and mechanical properties, such as low specific weight and high rigidity together with high capability to absorb the impact energy. In the framework of the concept of "metal foam" we can talk about materials both with closed and interconnected internal cavities -pores -with different layout, shape and size [4][5][6].…”

Section: Evaluation Of Porous Materialsmentioning

confidence: 99%

Archives of Metallurgy and Materials

Kroupová¹,

Lichý²,

Ličev³

et al. 2018

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Internal structure of metal foams is one of the most important factors that determine its mechanical properties. There exists a number of methods for studying the nature of the inner porous structure. Unfortunately most of these processes is destructive and therefore it is not possible to reuse the sample. From this point of view, as a suitable method seems to be the ability of using the so-called X-ray microtomography (also micro-CT). This is a non-destructive methodology used in a number of fields (industry, science, archaeology, medicine) for a description of the material distribution in the space (e.g. pores, fillers, defects, etc.). In principle, this technology works on different absorption of X-ray radiation by materials with changing proton number. The contribution was worked out in collaboration with experts from the Faculty of Electrical Engineering and Computer Science of the VŠB-Technical University of Ostrava and it is focused on the analysis of internal structure of the metal foam casting with irregular arrangement of internal pores by using micro-CT. The obtained data were evaluated in the commercial software VGStudio MAX 2.2 and in the FOTOM NG system. For the evaluation of these data a new specialized module was introduced in this system. Several methods of pre-processing the image was prepared for the measurement. This preliminary processing consists, for example, from a binary image thresholding for better diversity between the internal porosity and the material itself or functions for colour inversion.

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Section: Evaluation Of Porous Materialsmentioning

confidence: 99%

Archives of Metallurgy and Materials

Kroupová¹,

Lichý²,

Ličev³

et al. 2018

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show abstract

“…Among other aspects, the preparation method of the metallic lattice structures mainly includes investment casting [5,20], additive manufacture [6,21,22], deformation forming [2], woven metal textiles [23][24][25][26][27] and so on. Although these methods can produce many different metallic lattice structures, their limitations are still obvious.…”

Section: Introductionmentioning

confidence: 99%

Damping behaviors of steel-based Kelvin lattice structures fabricated by indirect additive manufacture combining investment casting

Yan

Yang

et al. 2020

Smart Mater. Struct.

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The lattice structures have broad application prospect in the fields of lightweight design, vibration and noise reduction and so on. In this work, firstly, steel-based lattice structures were designed based on Kelvin unit cell with isotropic properties. Then, steel-based lattice structures were prepared by using of indirect additive manufacture combining with investment casting process. Thirdly, the finite element numerical simulation and modal testing of the dynamic damping performance of the steel-based lattice structures were carried out. The results show that changing the porosity of the lattice structures, the vibration parameters such as the natural frequency and damping ratio of the lattice structures can be well regulated. At the same time, the damping ratios of the lattice structures are considerably improved compared with the solid materials.

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Numerical simulation and experimental validation on fabrication of nickel-based superalloy Kagome lattice sandwich structures

Yan

Yang

et al. 2020

China Foundry

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L attice sandwich structures composing of panels and lattice cores have been paid more and more attention in recent years. The lattice sandwich structures possess structural characteristics of lightweight, high specific strength and stiffness, as well as functional characteristics such as vibration and noise reduction, energy absorption and heat dissipation. Therefore, it is considered as one of the most promising new generation lightweight structures [1, 2]. Among them, nickel-based superalloy lattice sandwich structures have a broad application prospect in the aerospace field due to their lightweight and high temperature resistance. At present, research of the lattice sandwich structures are mainly focused on mechanical analysis and preparation processes. In order to obtain excellent performance, various representative unit cell structures have been

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Proposal of Method of Removal of Mould Material from the Fine Structure of Metallic Foams used as Filters

Cited by 4 publications

References 5 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Damping behaviors of steel-based Kelvin lattice structures fabricated by indirect additive manufacture combining investment casting

Numerical simulation and experimental validation on fabrication of nickel-based superalloy Kagome lattice sandwich structures

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