Development of environmentally friendly cast alloys. High-zinc Al alloys

• Autorzy: Krajewski W. , Buras J. , Żurakowski M. , Greer A. , Mancheva M. , Haberl K. , Schumacher P.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The main purpose of this paper is presenting the results obtained in years 2007 – 2010 in frame of the project Marie Curie Transfer of Knowledge – CastModel. The project was focused, among others, at elaborating new, environmentally friendly cast alloys based on the Al-Zn system. Particularly, efforts were aimed at improving ductility of the sand cast high-zinc aluminium alloys (HZnAl) by using the newly elaborated master alloys, based on the Al-Zn-Ti system. Design/methodology/approach: The presented work is focused on the nucleation of the high-zinc Al-20 wt% Zn (HZnAl AlZn20) alloy, known as the high damping one, aiming at improving plastic properties of the sand castings. The melted alloy was nucleated with AlTi5B1 (TiBAl) and AlTi3C0.15 (TiCAl) refiners as well as with the newly introduced ZnAl-Ti3 one. During the research the following experimental techniques were used: LM, SEM-EBSD, EDS, TA, DSC, Quantitative Metallography, UTS, Elongation and Attenuation coefficient measurements. Findings: During the performed examinations it was found out that significant increasing of the grain population of the inoculated alloy increases plasticity represented by elongation. The attenuation coefficient of the nucleated alloy, measured using an Olympus Epoch XT device, preserves its high value. The results obtained allow to characterize the examined AlZn20 alloy as promissive, having good strength and damping properties as well as the environmentally friendly alloy because of its comparatively low melting temperatures. Practical implications: The grain-refined high-zinc aluminium alloys can be used as the high damping substitutes of the traditional, more energy consumable Fe-based foundry alloys. Originality/value: The newly elaborated ZnAl-Ti based master alloys show high refining potency and quick dissolution in low melting temperatures of about 500°C, and are the promissive alternatives of the traditional AlTi-based ones.

Słowa kluczowe

EN

ecological alloys; dumping; cast alloys

PL

tłumienie; stopy ekologiczne; stopy odlewnicze

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2010
• Tom: Vol. 45, nr 2
• Strony: 120--124
• Opis fizyczny: Bibliogr. 18 poz.

Twórcy

autor

Krajewski W.

autor

Buras J.

autor

Żurakowski M.

autor

Greer A.

autor

Mancheva M.

autor

Haberl K.

autor

Schumacher P.

• AGH University of Science and Technology, Faculty of Foundry Engineering. ul. Reymonta 23, 30-059 Kraków, Poland,

Bibliografia

• [1] 39th Census of World Foundry Production - 2004. Modern Casting 95 (Dec. 2005) 27-29.
• [2] 40th Census of World Foundry Production - 2005. Modern Casting 96 (Dec. 2006) 28-31.
• [3] 41st Census of World Foundry Production - 2006. Modern Casting 97 (Dec. 2007) 22-25.
• [4] 42nd Census of World Foundry Production - 2007. Modern Casting 98 (Dec. 2008) 24-27.
• [5] 43rd Census of World Foundry Production - 2008. Modern Casting 99 (Dec. 2009) 17-21.
• [6] ASM Handbook, Vol. 2, Properties and Selection - Nonferrous Alloys and Special-Purpose Materials, ASM International, Materials Park, OH, 1990.
• [7] A.E. Wol, Structure and properties of metallic systems, Fizmatgiz, Moscow, 1959 (in Russian).
• [8] I.G. Ritchie, Z.-L. Pan, High-damping metals and alloys, Metallurgical Transactions A 22 (1991) 607-616.
• [9] W. Krajewski, Investigation of the high-aluminium zinc alloys grain refinement process due to Ti addition, Archives of Metallurgy 44 (1999) 51-61.
• [10] W. Krajewski, DTA examinations of the solidification course of medium-aluminium zinc alloys modified with Ti, Metallurgy and Foundry Engineering 26 (2000) 143-147.
• [11] W.K. Krajewski, A.L. Greer, T.E. Quested, W. Wolczynski, Identification of the substrate of heterogeneous nucleation in Zn-Al alloy doped with ZnTi-based master alloy, Solidification and Crystallization, ch. 16, Viley-VCH, 2004.
• [12] W.K. Krajewski, A.L. Greer, J. Buras, Grain refinement of Al-Zn alloys by melt inoculation with Zn-Ti based refiner. Proceedings of the "European Congress on Advanced Materials and Processes" Euromat2005, Prague, 2005.
• [13] W.K. Krajewski, A.L. Greer, J. Zych, J. Buras, Effective-ness of Zn-Ti based refiner of Al and Zn foundry alloys, Proceedings of the 67th "World Foundry Congress", Harrogate, 2006.
• [14] W.K. Krajewski, A.L. Greer, J. Zych, M. Zurakowski, Influence of grain refinement on damping properties of the Al-Zn cast alloys, Proceedings of the "European Congress on Advanced Materials and Processes" Euromat2007, Nuremberg, 2007.
• [15] W.K. Krajewski, J. Buras, M. Zurakowski, A.L. Greer, Structure and properties of grain-refined Al - 20 wt% Zn sand cast alloy, Archives of Metallurgy and Materials 54 (2009) 329-334.
• [16]K. Haberl, Examination of the influence of various grain refiners on an AlZn20 alloy, Report 1, Marie Curie Host Fellowship, AGH Cracow, June 2009 (unpublished).
• [17]K. Haberl, Examination of AlZn20 alloyed with various grain refiners, Report 2, Marie Curie Host Fellowship, AGH Cracow, July 2009 (unpublished).
• [18]K. Haberl, W.K. Krajewski, P. Schumacher, Microstructural features of the grain-refined sand cast alloy AlZn20, Archives of Metallurgy and Materials 55 (2010) 837-841.