Journal
JOM
Volume 68, Issue 1, Pages 185-197Publisher
SPRINGER
DOI: 10.1007/s11837-015-1672-5
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Funding
- Polish National Centre for Research and Development
- [INNOTECH-K2/IN2/8/181849/NCBR/13]
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The aim of this work was to determine the effect of melt-pouring temperature T-m and inoculant (cobalt aluminate-CoAl2O4) concentration in the prime coat of the shell mold on the macro-and microstructure of the IN713C superalloy. The results show that cobalt aluminate is an effective modifier of the IN713C superalloy, which causes refinement of the equiaxed grains (EX) and a reduction of the fraction and size of the columnar grains on the casting surface. Also, the melt-pouring temperature in the range of 1450-1520 degrees C was found to influence the mean EX grain size. Based on the results of differential thermal analysis of the alloy and detailed microstructure characterization, a sequence of precipitations has been proposed that advances current understanding of processes that take place during alloy solidification and casting cooling.
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