Metallurgical Quality of Feed Ingots and Castings Made from Nickel and Cobalt Superalloys

Abstract:

The paper presents the results of ATD thermal analysis of feed ingots (master heat) and castings made from IN-713C, MAR-247 and MAR-509 superalloys. Metallurgical quality assessment was made based on the analysis of dT/dt curve in rage from T_eut to T_sol. Furthermore, impurities (oxides of Al, Zr, Hf, Cr etc.) have been identified inside the shrinkage cavities of feed ingots and castings. Significant similarities has been observed between impurities found in ingots, ATD test samples and finished castings. It has been demonstrated that ATD analysis of samples taken from different parts of feed ingot can be effective method of metallurgical quality assessment for these ingots.

• Periodical: Solid State Phenomena (Volume 212)
• Pages: 215-220
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.212.215
• Online since: December 2013
• Authors: Franciszek Binczyk, Jan Cwajna, Paweł Gradoń, Maria Sozańska, Marek Cieśla
• Keywords: ATD Analysis, Cobalt Alloys, Feed Ingot, Impurity, Nickel Alloy, Superalloy, Undesired Inclusions

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