The paper is devoted to grain-refinement of the medium-aluminium zinc based alloys (MAl-Zn). The system examined was sand cast Zn- 10 wt. %. Al binary alloy (Zn-10Al) doped with commercial Al-3 wt. % Ti - 0.15 wt. % C grain refiner (Al-3Ti-0.15C GR). Basing on the measured attenuation coefficient of ultrasonic wave it was stated that together with significantly increased structure fineness damping decreases only by about 10 - 20%. The following examinations should establish the influence of the mentioned grain-refinement on strength and ductility of MAl-Zn cast alloys.
 Krajewski, W.K., Buras, J., Zurakowski, M., & Greer, A.L. (2009). Structure and properties of grain-refined Al-20wt% Zn sand cast alloy. Archives of Metallurgy and Materials. 54(2). 329-334.
 Haberl, K., Krajewski, W.K. & Schumacher, P. (2010). Microstructural Features of the Grain-refined Sand Cast Alloy AlZn20. Archives of Metallurgy and Materials. 55(3). 837-841.
 Buras, J. (2011). The influence of grain refinement on damping properties of selected aluminium zinc cast alloys. PhD thesis supervised by W.K. Krajewski, AGH University of Science and Technology - Faculty of Foundry Engineering, Krakow.
 Krajewski, W.K. Haberl-Faerber, K., Buras, J. & Krajewski, P.K. (2012). Damping properties vs. structure fineness of the high-zinc aluminum alloys. Archives of Foundry Engineering. 12 (3). 63-66.
 Krajewski, W.K. Greer, A.L., Krajewski, P.K., Piwowarski, G. (2014). Grain refinement of zinc-aluminium based foundry alloys, Accepted to 71st World Foundry Congress, Area: Non Ferrous and Light Alloys, Bilbao, Spain, 19-24 May
 Piwowarski, G. Doctoral thesis, AGH University of Science and Technology - Faculty of Foundry Engineering (in progress)