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Title: ANALYSIS OF METHOD FOR POROSITY ASSESSMENT OF THE RECYCLED ALUMINUM CASTINGS

ANALYSIS OF METHOD FOR POROSITY ASSESSMENT OF THE RECYCLED ALUMINUM CASTINGS

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Peter Blasko; Alena Pribulova; Jozef Petrik; Pavol Palfy; Maria Mihalikova
10.5593/sgem2022/4.1/s18.22
10.5593/sgem2022/4.1
1314-2704
978-619-7603-44-6
English
22
4.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Recycling
In the context of the recycling of waste from wrought aluminum alloys, especially food packaging, these were re-melted and cast into bars. The alloy thus obtained contains up to 2.0% Si, 0.8% Cu, 2.0% Fe, 2.5% Mn and other elements in tenths of %. The problem in its further processing is the porosity. Several methods were used to quantify it, of which the most accurate method was weighing. The disadvantage of this method is the requirements of the competence of the personnel as well as technical equipment. Other methods based on metallography, stereometric analysis, defectoscopy, comparison with standards and measurement of macro-hardness were compared with this method in terms of accuracy and complexity. Each of the analysed methods has advantages and disadvantages. The best results were obtained in metallographic analysis using the ImageJ software. The paper presents regression equations, which allow to compare results of the porosity obtained by used methods. None of the tested methods can fully replace the labor-intensive and equipment-intensive weighting method for determining porosity. Closest to the standard is stereological method which is done after the penetration test and hardness test. Unfortunately, in addition to experienced operators, they also require relatively special equipment. For a small manufacturer, the most reasonable way is to make a cut using only grinding and compare the area thus obtained with the standard according to ISO 10 049.
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[12] EN ISO 6506-1:2018 - Metallic materials - Brinell hardness test - Part 1: Test method.
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This work was supported by the Scientific Grant Agency of The Ministry of Education of the Slovak republic No.VEGA 1/0265/21, VEGA 1/0002/22.
conference
https://doi.org/10.5593/sgem2022/4.1/s18.22
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Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022
22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 04 - 10 July, 2022
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Turkish Acad Sci.
169-176
04 - 10 July, 2022
website
8592
waste material, recycling, Al alloys, porosity, regression