The Influence of Home Scrap on Mechanical Properties of MgAl9Zn1 Alloy Castings

• Autorzy: Konopka Z. , Chojnacki A. C. , Łągiewka M. , Zyska A.

Identyfikatory

DOI

10.1515/afe-2017-0048

• Języki publikacji: EN

Abstrakty

EN

The work presents the results of examinations concerning the influence of various amounts of home scrap additions on the properties of castings made of MgAl9Zn1 alloy. The fraction of home scrap in the metal charge ranged from 0 to 100%. Castings were pressure cast by means of the hot-chamber pressure die casting machine under the industrial conditions in one of the domestic foundries. The examinations consisted in the determination of the following properties: tensile strength Rm, yield strength Rp0.2, and the unit elongation A5, all being measured during the static tensile test. Also the hardness measurements were taken by the Brinell method. It was found that the mechanical properties (mainly the strength properties) are being improved up to the home scrap fraction of 50%. Their values were increased by about 30% over this range. Further rise in the home scrap content, however, brought a definite decrease in these properties. The unit elongation A5 exhibited continual decrease with an increase in the home scrap fraction in the metal charge. A large growth of hardness was noticed for the home scrap fraction increasing up to the value of 50%. Further increasing the home scrap percentage, however, did not result in a significant rise of the hardness value any more.

Słowa kluczowe

EN

innovative foundry technologies; innovative foundry materials; automation in foundry; robotics in foundry; environmental protection; mechanical properties; magnesium alloys

PL

innowacyjne technologie odlewnicze; innowacyjne materiały odlewnicze; automatyzacja odlewnictwa; robotyka w odlewni; ochrona środowiska; właściwości mechaniczne; stopy magnezu

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 2
• Strony: 39--42
• Opis fizyczny: Bibliogr. 16 poz., tab., wykr.

Twórcy

autor

Konopka Z.

• Czestochowa University of Technology, Department of Foundry, Al. Armii Krajowej 19, 42-200 Częstochowa, Poland

autor

Chojnacki A. C.

• Czestochowa University of Technology, Department of Foundry, Al. Armii Krajowej 19, 42-200 Częstochowa, Poland

autor

Łągiewka M.

• Czestochowa University of Technology, Department of Foundry, Al. Armii Krajowej 19, 42-200 Częstochowa, Poland

autor

Zyska A.

• Czestochowa University of Technology, Department of Foundry, Al. Armii Krajowej 19, 42-200 Częstochowa, Poland

Bibliografia

• [1] Przybyłowicz, K. (1999). Physical Metallurgy. Warsaw: Ed. WNT. 4th edition. (in Polish).
• [2] Gross, W.H. (1959). The Story of Magnesium. American Society for Metal.
• [3] PN-EN 1753. (2001). Magnesium and magnesium alloys - Magnesium alloy ingots and castings. Ed. Polish Committee for Standardization. (in Polish).
• [4] Avedesian, M.M., Baker, H. (1999). Magnesium and Magnesium Alloys. ASM International.
• [5] Dobrzański, L.A. (1998). Physical Metallurgy. Warsaw: Ed. WNT. (in Polish).
• [6] Eliezer, D., Aghion, E., Froes, F.H. (1997). Magnesium science, technology and applications. In Magnesium 97. Dead Sea, Israel. (pp. 169-177).
• [7] Fitze, R. (2003). Improve the competitiveness of magnesium die casting by inline recycling of ten runner system. In 11th Magnesium Automotive and End User Seminar, (pp. 25-26) September 2003 Aalen.
• [8] Cashion, S.P., Ricketts N.J. (2001). The Metallurgical Society of CIM. Replacing SF6 with the hydrofluorocarbon gas HFC-134a for magnesium melt protection, presented at The Conference of Metallurgists. Toronto. Canada.
• [9] ASM handbook (1994). ASM international, third printing. vol.15 casting.
• [10] Eliezer, A., Abramov, E., Gutman, E.M. (1997). Mechano-chemical behavior and plasticity of Mg-Al alloys. In Magnesium 97. Dead Sea, Israel. (pp. 192-201).
• [11] Street, A.C. (1986). The die casting book. (Second edition). Redhill: Portcullis Press.
• [12] Kainer, K.U. (2000). Magnesium Alloys and their Application. In Sb. Int. Congress Magnesium Alloys and their Aplication. Mnichov. (pp. 534-608).
• [13] Dahle, A.K., StJohn, D.N. (1999) The Origin of Banded Defects in High Pressure Die Cast Magnesium Alloys. In Proceedings of 20th International Die Casting Congress, World of Die Casting. Cleveland T99-062.
• [14] Chojnacki, A., Konopka, Z. (2010). Influence of the AZ91 alloy home scrap in charge on pressure castings structure. In 11th International Scientific Conference ‘New technologies and achievements in metallurgy and material science’, 20-21 May 2010 (pp. 559-563). Częstochowa: Ed. WIPMiFS. (in Polish).
• [15] Chojnacki, A., Konopka, Z. (2010). Casting of the AZ91 alloy below atmospheric pressure. In 11th International Scientific Conference ‘New technologies and achievements in metallurgy and material science’, 20-21 May 2010 (pp. 563-566). Częstochowa: Ed. WIPMiFS. (in Polish).
• [16] Konopka, Z. & Chojnacki, A. (2011) Structure of the AZ91 alloy pressure castings fabricated of home-scrap containing charge. Archives of Foundry Engineering. 11(2), 61-64.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)