Scholarly record
ANALYSIS OF METHOD FOR POROSITY ASSESSMENT OF THE RECYCLED ALUMINUM CASTINGS
Abstract
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.
Publication Impact Profile
- Captures
- Mendeley - Readers: 3
Publication details
References12
Trpcevska, J., Laubertova, M., Metal waste and its processing, Slovakia, 2015, pp. 61 - 67.
De Terris, Th. et al., Optimization and comparison of porosity rate measurement methods of Selective Laser Melted metallic parts, Additive Manufacturing, Netherlands, vol. 28, 2019, pp. 802-813. DOI: 10.1016/j.addma.2019.05.035
Tyagita, D. A, Irawan, A.. Porosity and Microstructure Analysis in Aluminum Waste Pieces. The first international conference of food and agriculture, Bahasa Indonesia, 2018, pp. 565-571.
Futas, P., Petrik, J., Pribulova, A., Blasko, P., Palfy, P., The fluidity of Al-Si alloy: Computer simulation of the influence of temperature, composition, and pouring speed, Archives of Metallurgy and Materials, vol.63, 2018, pp. 1799 � 1804. DOI: 10.24425/amm.2018.125107
ISO 10049: 2019 Aluminum alloy castings - Visual method for assessing porosity
Saltykov, S. A., Stereometric Metallography, Soviet Union, 1958, pp. 81 - 99.
Vander Voort, G. F., Metallography, Principles and Practice, 1984, pp. 445-465. DOI: 10.31399/asm.tb.mpp.9781627082600
ISO 3452-2: 2021 Non-destructive testing - Penetrant testing - Part 2: Testing of penetrant materials.
Hlebova, S., Ambrisko, L., Pesek, L., Strain Measurement in Local Volume by Noncontact Videoextensometric Technique on Ultra High Strength Steels, Key Engineering Materials, Vol.586, 2014, pp.129 � 132. DOI: 10.4028/www.scientific.net/kem.586.129
E 562 � 01, ASTM Designation: Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count, USA, 2019.
Falat, L., Ciripova, L., Homolova, V., Futas, P., Sevc, P., Hydrogen pre-charging effects on the notch tensile properties and fracture behaviour of heat-affected zones of thermally aged welds between T24 and T92 creep-resistance steels. Metallic Materials, Vol. 54, 2016, pp. 417 � 727. DOI: 10.4149/km_2016_6_417
EN ISO 6506-1:2018 - Metallic materials - Brinell hardness test - Part 1: Test method.
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.