TY - JOUR N2 - This paper considers the assessment of attenuation in aluminium alloys castings and in cast iron prepared by gravity casting method and by casting under pressure. The issue of ultrasound attenuation is important in setting the conditions of non-destructive (NDT) testing, especially in casted materials. The characteristics of the ultrasonic technique and ultrasonic attenuation and the calculation of the attenuation and the velocity of ultrasound are presented in the theoretical part of this paper. For experimental measurements, cylindrical castings from AlSi alloy (a hypoeutectic alloy with a silicon content of about 7% - AlSi7 and a eutectic alloy with a silicon content of about 12% - AlSi12) and from grey and ductile cast iron were made. The ultrasonic records of the casting control, the calculation of ultrasound attenuation for individual samples are listed and described in the experimental part. The evaluation of measurements and comparison of calculated ultrasound attenuation is at the end of this article. L1 - http://journals.pan.pl/Content/106796/PDF/AFE%202_2018_27.pdf L2 - http://journals.pan.pl/Content/106796 PY - 2018 IS - No 2 DO - 10.24425/122519 KW - AlSi alloys KW - cast iron KW - technological casting parameters KW - ultrasound attenuation A1 - Boháčik, M. A1 - Mičian, M. A1 - Sládek, A. PB - The Katowice Branch of the Polish Academy of Sciences VL - vol.18 DA - 2018 T1 - Evaluating the Attenuation in Ultrasonic Testing of Castings UR - http://journals.pan.pl/dlibra/publication/edition/106796 T2 - Archives of Foundry Engineering ER -