@CONFERENCE{MTMT:34394378, title = {Analysis of Different Commercial Solid Fluxes Used for the Melt Treatment of Casting Aluminum Alloys}, url = {https://m2.mtmt.hu/api/publication/34394378}, author = {Gyarmati, Gábor and Ádám, Pálóczi and Dorottya, Somfai and Ferenczi, Tibor and Kéri, Zoltán}, booktitle = {Book of Abstracts from 9th International Scientific Conference on Advances in Mechanical Engineering}, unique-id = {34394378}, year = {2023}, pages = {29} } @article{MTMT:34144274, title = {Analysis of the Quality of Incoming AlSi9Mn Alloy Ingots}, url = {https://m2.mtmt.hu/api/publication/34144274}, author = {Gyarmati, Gábor and Kéri, Zoltán and Mende, Tamás and Molnár, Dániel}, doi = {10.1007/s40962-023-01146-y}, journal-iso = {INT J METALCAST}, journal = {INTERNATIONAL JOURNAL OF METALCASTING}, unique-id = {34144274}, issn = {1939-5981}, abstract = {Previous research revealed that the quality of the ingots produced by different primary or secondary alloy suppliers can differ remarkably. In this way, the quality of the liquid metal and the castings produced from it can be affected by the impurity content of the ingots used as charge material. In this work, a modified reduced pressure test (RPT) technique, which is based on the remelting of samples extracted from ingots, was applied to investigate the quality of primary AlSi9Mn ingots made by horizontal direct-chill (HDC) casting and gravity casting techniques. For the evaluation of metal quality, image analysis of the cross sections was applied. Pore area fraction, number density, normalized bifilm index, and normalized total pore perimeter were determined, and the relationships between the different metrics were analyzed. The results were compared with the melt quality assessment of the as-melted batches made from the ingots. Solidification simulations, thermal analysis, and microstructural investigations were conducted to investigate the solidification conditions of traditional and remelted RPT samples. Based on the results, the HDC cast ingots possess lower oxide and gas concentrations, which can be traced back to the differences in the melt preparation and casting technologies of the ingots. The comparison of the parameters evaluated by image analysis revealed that there is a strong linear relationship between normalized bifilm index and normalized total pore perimeter. The possible sources of error in ingot quality evaluation are highlighted.}, year = {2023}, eissn = {2163-3193}, orcid-numbers = {Gyarmati, Gábor/0000-0001-7568-6922} } @misc{MTMT:33748835, title = {Innovatív alumínium öntészeti technikák}, url = {https://m2.mtmt.hu/api/publication/33748835}, author = {Molnár, Dániel and Kéri, Zoltán and Erdélyi, János Péter}, unique-id = {33748835}, year = {2023} } @CONFERENCE{MTMT:33732273, title = {Porozitás mennyiség csökkentése lap alakú nyomásos öntvény esetén}, url = {https://m2.mtmt.hu/api/publication/33732273}, author = {Kéri, Zoltán}, booktitle = {XXIV. Nemzetközi Bányászati, Kohászati és Földtani Konferencia}, unique-id = {33732273}, year = {2023}, pages = {29-33} } @CONFERENCE{MTMT:33732265, title = {3D nyomtatáshoz használt fémporok alapvizsgálata újrahasználhatóság szempontjából}, url = {https://m2.mtmt.hu/api/publication/33732265}, author = {Hudák, Henrietta and Budavári, Imre and Ferenczi, Tibor and Kéri, Zoltán}, booktitle = {XXIV. Nemzetközi Bányászati, Kohászati és Földtani Konferencia}, unique-id = {33732265}, year = {2023}, pages = {23-28} } @CONFERENCE{MTMT:33732232, title = {Öntészeti alumínium ötvözet tömbök minőségének ellenőrzése alacsony nyomáson dermedő próbatestekkel}, url = {https://m2.mtmt.hu/api/publication/33732232}, author = {Gyarmati, Gábor and Kéri, Zoltán and Molnár, Dániel}, booktitle = {XXIV. Nemzetközi Bányászati, Kohászati és Földtani Konferencia}, unique-id = {33732232}, year = {2023}, pages = {17-22} } @{MTMT:33572949, title = {Analysis of the Quality of Incoming Aluminum Alloy Ingots}, url = {https://m2.mtmt.hu/api/publication/33572949}, author = {Gyarmati, Gábor and Kéri, Zoltán and Molnár, Dániel}, booktitle = {8th International Scientific Conference on Advances in Mechanical Engineering (ISCAME 2022)}, unique-id = {33572949}, year = {2022}, pages = {36-37} } @article{MTMT:33202136, title = {Grain Refiner Settling and Its Effect on the Melt Quality of Aluminum Casting Alloys}, url = {https://m2.mtmt.hu/api/publication/33202136}, author = {Gyarmati, Gábor and Bogoly, Levente and Stawarz, Marcin and Fegyverneki, György and Kéri, Zoltán and Tokár, Mónika and Mende, Tamás}, doi = {10.3390/ma15217679}, journal-iso = {MATERIALS}, journal = {MATERIALS}, volume = {15}, unique-id = {33202136}, abstract = {Grain refiner particles, which are intended to induce the formation of fine equiaxed grain structure during the solidification of aluminum alloys, are prone to settling during the holding of the liquid metal, which phenomenon can affect not only the grain size but the spatial distribution of the double oxide films in the melt. In this study, the settling of Al3Ti inoculant particles, as well as its effects on melt quality and grain refinement, were studied. During the experiments, the Ti-concentration of a liquid Al-Si-Mg-Cu alloy was increased to 0.3 wt.% by the addition of Al-10%Ti master alloy at different melt temperatures. Particle settling and grain size evolution were studied by quantitative metallography, while the interactions of grain refiners and bifilms were investigated by scanning electron microscopy (SEM). The evolution of melt quality was assessed by the computed tomographic (CT) analysis of reduced pressure test (RPT) samples. It was found that effective grain refinement was only realized when the introduced blocky Al3Ti particles were dissolved and re-precipitated in the form of (Al,Si)3Ti at a lower temperature. Without dissolving at higher holding temperatures, Al3Ti particle settling has taken place within 10 min. The settling of (Al,Si)3Ti particles improved melt quality by the aided sedimentation of bifilms in the melt.}, year = {2022}, eissn = {1996-1944}, orcid-numbers = {Gyarmati, Gábor/0000-0001-7568-6922; Stawarz, Marcin/0000-0001-7729-6768} } @CONFERENCE{MTMT:32772209, title = {The Formation of Entrainment Defects during Rotary Degassing Treatments with Different Purging Gases}, url = {https://m2.mtmt.hu/api/publication/32772209}, author = {Gyarmati, Gábor and Fanni, Vincze and Kéri, Zoltán and Fegyverneki, György and Molnár, Dániel}, booktitle = {10th International Aluminium Symposium}, unique-id = {32772209}, year = {2022}, pages = {198-205} } @article{MTMT:32738858, title = {The Effect of Rotary Degassing Treatments with Different Purging Gases on the Double Oxide- and Nitride Film Content of Liquid Aluminum Alloys}, url = {https://m2.mtmt.hu/api/publication/32738858}, author = {Gyarmati, Gábor and Vincze, Fanni and Fegyverneki, György and Kéri, Zoltán and Mende, Tamás and Molnár, Dániel}, doi = {10.1007/s11663-021-02414-0}, journal-iso = {METALL MATER TRANS B}, journal = {METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE}, volume = {53}, unique-id = {32738858}, issn = {1073-5615}, year = {2022}, eissn = {1543-1916}, pages = {1244-1257}, orcid-numbers = {Gyarmati, Gábor/0000-0001-7568-6922} }