Evaluation of porosity of AlZn5Mg castings made by squeeze casting technology

• Autorzy: Boroń Kinga

Identyfikatory

DOI

10.32933/ActaInnovations.32.2

• Języki publikacji: EN

Abstrakty

EN

The paper shows the results of research aimed to assess the impact of high squeeze pressure on the porosity of AlZn5Mg alloy castings, including its distribution in slab-type castings with dimensions of 25 x 100 x 200 mm. The research was carried out on castings made by two methods: squeeze casting and gravity casting. The pressing was conducted at a pressure of 100 MPa at an initial mould temperature of 200°C. The research identified the middle and outer parts of the casting. Experimental research was preceded by numerical simulation of the casting solidification, then a porosity assessment was carried out using the hydrostatic weighing method, which was supplemented by structural observations. The results of the research showed a two-fold decrease in the porosity in the middle part of the casting which is most exposed to the occurrence of shrinkage voids formed in the final clotting phase. Structural tests revealed the occurrence of dispersed porosity in castings, mainly of shrinkage and / or shrinkage-gas origin. The impact of pressure of 100 MPa during solidification caused fragmentation of the primary structure of castings, which resulted in a higher grain density.

Słowa kluczowe

EN

squeeze casting; AlZn5Mg; porosity

PL

prasowanie; odlew; Al-Zn5-Mg; porowatość

• Wydawca: Centrum Badań i Innowacji Pro-Akademia ; Ukrainian Academy of Sciences - Research and Development Centre for Industrial Problems of Development
• Czasopismo: Acta Innovations
• Rocznik: 2019
• Tom: no. 32
• Strony: 12--19
• Opis fizyczny: Bibliogr. 16 poz.

Twórcy

autor

Boroń Kinga

• Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

Bibliografia

• [1] M. Perzyk, Odlewnictwo, Wydanie II, Wydawnictwa Naukowo -Techniczne PWN-WNT (Foundry, 2nd Edition, PWN-WNT Scientific and Technical Publishing House), Warszawa, 2017
• [2] L. A. Dobrzański, Podstawy nauki o materiałach i metaloznawstwo, Wydawnictwo Naukowo – Techniczne (Fundamentals of materials and metal science, Scientific and Technical Publishing House), Warszawa, 2002
• [3] G.W. Lorimer, in: K.C. Russell, H.I. Aaronson (Eds.), Precipitation Processes in Solids, The Metallurgical Society of AIME, 1978, 87-119
• [4] D.R. Haeffner, J.B. Cohen, Acta Metallurgica 40, 831, 1992
• [5] A. Zyska, Z. Konopka, M. Łagiewka, M. Nadolski, Heat treatment of squeezed AlZnMg alloy, ARCHIVES of FOUNDRY ENGINEERING, ISSN (1897-3310) Volume 8, 2008, 123-126
• [6] I.J. Polmear, Light Alloys, Journal of Metallurg and Materials Science, Series 3rd Edition, London 1995
• [7] L.F. Mondolfo, 1971, International Materials Reviews 153, 95, 1971
• [8] S.K. Maloney, K. Hono, I.J. Polmear, S.P. Ringer, ScriptaMetallurgica 41, 1031,1999
• [9 ] J. Sobczak, Teoretyczne i praktyczne podstawy procesy prasowania w stanie ciekłym (squeeze casting) metali nieżelaznych (Theoretical and practical foundations of liquid state squeeze casting processes for non-ferrous metals), Prace Instytutu Odlewnictwa, Zeszyt Specjalny Nr 41, Krakow,1993
• [10] M.R. Ghomashchi, A. Vikhrov, Squeeze casting: an overview, Journal of Materials Processing Technology 101, 2000
• [11] A. Zyska, Z. Konopka, M. Łągiewka, A. Bober, S. Nocuń, Modyfikacja Stopu AlZn5Mg, Archives of Foundry, Year 2006, Volume 6, № 22, Archiwum Odlewnictwa, Rocznik 6, Nr 22, 2006
• [12] A. Zyska, Z. Konopka, M. Łagiewka, M. Nadolski, Characteristics Of Squeeze Cast AlZn5Mg Alloy Castings, ARCHIVES OF METALLURGY AND MATERIALS Volume 55 Issue 3, 2010
• [13] E. Fraś, Krystalizacja metali, Wydawnictwo Naukowo – Techniczne (Metal crystallization, Scientific and Technical Publishing House), Warszawa, 2003
• [14] R. Haimann, Metaloznawstwo, Część I, Wydanie trzecie zmienione, Oficyna Wydawnicza Politechniki Wrocławskiej, Wrocław, 2000
• [15] A. Cherif, S. Souissi, M.B. Amar, C. Bradai, M. Khitouni, Effect of Squeeze Casting pressure on microstructure and mechanical properties of recycled aluminum alloy, Journal of the Tunisian Chemical Society, 19, 2017, 198-207
• [16] A. Zyska, Z. Konopka, M.Łągiewka, M. Nadolski, The influence of squeeze casting parameters on the mechanical properties of AlZn5Mg alloy, Archives of Foundry Engineering Volume 8, 2008, 347-350

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).