Evaluation of Properties of Cast Metal Foams with Irregular Inner Structure

• Autorzy: Kroupová I. , Lichý P. , Ličev L. , Hendrych J. , Souček K.

Identyfikatory

DOI

10.24425/amm.2018.125114

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

metal foams; irregular structure; precursor; porosity; micro-CT

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2018
• Tom: Vol. 63, iss. 4
• Strony: 1847--1851
• Opis fizyczny: Bibliogr. 11 poz., fot., rys.

Twórcy

autor

Kroupová I.

• VŠB-Technical University of Ostrava, Faculty of Materials Science and Technology, Department of Metallurgy and Foundry Engineering, 17. Listopadu 15/2172, Ostrava-Poruba, Czech Republic

autor

Lichý P.

• VŠB-Technical University of Ostrava, Faculty of Materials Science and Technology, Department of Metallurgy and Foundry Engineering, 17. Listopadu 15/2172, Ostrava-Poruba, Czech Republic

autor

Ličev L.

• VŠB-Technical University of Ostrava, Faculty of Electrical Engineering and Computer Science, Department of Computer Science, 17. Listopadu 15/2172, Ostrava-Poruba, Czech Republic

autor

Hendrych J.

• VŠB-Technical University of Ostrava, Faculty of Electrical Engineering and Computer Science, Department of Computer Science, 17. Listopadu 15/2172, Ostrava-Poruba, Czech Republic

autor

Souček K.

• Institute of Geonics of the CAS, Studentská 1768, 708 00, Ostrava-Poruba, Czech Republic

Bibliografia

• [1] R. Gajdošík, Charakterizace porézních materiálů pomocí RTG mikrotomografie. Zlín, 2014. Bakalářská práce. Univerzita Tomáše Bati ve Zlíně.
• [2] W. K. Krajewski, J. Lelito, J. S. Suchy, P. Schumacher, Computed tomography – a new tool in structural examinations of castings, Archives of Metallurgy and Materials 54, 2, 335-338 (2009).
• [3] E. Maire, X-ray tomography applied to the characterization of cellular materials. Related finite element modeling problems, Composites Science and Technology 63, 16, 2431-2443 (2003).
• [4] J. Banhart, Manufacturing routes for metallic foams, Journal of Minerals, Metals and Materials 52, 12, 22-27 (2000).
• [5] I. Kroupová, V. Bednářová, T. Elbel, F. Radkovský, Proposal of method of removal of mould material from the fine structure of metallic foams used as filters, Archives of Metallurgy and Materials 59, 2, 727-730 (2014).
• [6] P. Lichý, T. Elbel, I. Kroupová, F. Radkovský, Preparation and evaluation of properties of cast metallic foams with regular inner structure, Archives of Metallurgy and Materials 42, 3, 1643-1646 (2017).
• [7] J. Banhart, Manufacture, characterisation an d application of cellular metals and metal foams, Progress in Materials Science 46, 6, 559-632 (2001).
• [8] F. García-Moreno, Commercial Applications of Metal Foams: Their Properties and Production, Materials 85, 9 (2016).
• [9] J. Hampl, T. Elbel, T. Válek, Document Application of thermodynamic calculations in the research of cast irons structure, Metalurgija 54, 2, 323-326 (2015).
• [10] N. Špirutová, J. Beňo, V. Bednářová, Alternative utilization of core sand for green sand system, Materiali in tehnologije 47, 5, 557-561 (2013).
• [11] L. Ličev, Systém FOTOMNG: architektura, funkce a použití. Praha: BEN-technická literatura, 2015.

Uwagi

EN

The contribution was worked out with the support of the Technology Agency of the Czech Republic – TA02011333 and TH02020668, project of "Student Grant Competition" numbers SP2018/77 and SP2018/60 and the Grant Agency of the Czech Republic – GACR P103/15/06700S.