TY - JOUR N2 - The paper presents results of measuring attenuation coefficient of the Al-20 wt.% Zn alloy (AlZn20) inoculated with different grain refiners. During experiments the melted alloys were doped with Al-Ti3-C0.15 refining master alloy. Basing on measurements performed by Krautkramer USLT2000 device with 1MHz ultrasound wave frequency it was stated that grain refinement reduces the attenuation coefficient by about 20-25%. However, the examined alloys can be still classified as the high-damping ones of attenuation greater than 150 dB/m. L1 - http://www.czasopisma.pan.pl/Content/88572/PDF/11_paper.pdf L2 - http://www.czasopisma.pan.pl/Content/88572 PY - 2015 IS - No 2 DO - 10.1515/afe-2015-0037 KW - High-Zinc Al alloy KW - Sand casting KW - Grain refinement KW - Damping capacity KW - Attenuation of ultrasound wave KW - strength properties A1 - Krajewski, P.K. A1 - Krajewski, W.K. A1 - J. Buraś A1 - Piwowarski, G. PB - The Katowice Branch of the Polish Academy of Sciences DA - 2015[2015.01.01 AD - 2015.12.31 AD] T1 - Ultrasound Wave Attenuation of Grain Refined High – Zinc Aluminium Sand-cast Alloys UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/88572 T2 - Archives of Foundry Engineering ER -