TY - JOUR N2 - The paper presents the results of research on the impact of impurities in the feed ingots (master heat) on the precipitation of impurities in the ATD thermal analysis probe castings. This impurities occur mostly inside shrinkage cavities and in interdendritic space. Additionally, insufficient filtration of liquid alloy during pouring promotes the transfer of impurities into the casting. The technology of melting superalloys in vacuum furnace prevents the removal of slag from the surface of molten metal. Because of that, the effective method of quality assessment of feed ingots in order to evaluate the existence of impurities is needed. The effectiveness of ATD analysis in evaluation of purity of feed ingots was researched. In addition the similarities of non-metallic inclusions in feed ingots and in castings were observed. L1 - http://www.journals.pan.pl/Content/87605/PDF/01_paper.pdf L2 - http://www.journals.pan.pl/Content/87605 PY - 2013 IS - No 4 DO - 10.2478/afe-2013-0073 KW - ATD KW - Superalloys KW - Feed ingot KW - Master heat KW - Solidification KW - non-metallic inclusions A1 - Gradoń, P. A1 - Binczyk, F. A1 - Cwajna, J. A1 - Sozańska, M. PB - The Katowice Branch of the Polish Academy of Sciences DA - 2013 T1 - The Influence of Impurities in Feed Ingots on the Quality of Castings Made from Nickel Superalloy IN-713C UR - http://www.journals.pan.pl/dlibra/publication/edition/87605 T2 - Archives of Foundry Engineering ER -