Effect of ERNiFeCr-2 Filler Metal on Solidification Cracking Susceptibility of CM247LC Superalloy Welds

نویسندگان

چکیده

The metallurgical aspects of weld solidification cracking in Ni-based superalloys (with Ti+Al > 5 mass%) have not been widely investigated thus far. Herein, the susceptibility CM247LC superalloy and its welds with ERNiFeCr-2 filler wire was quantitatively evaluated using a novel modified Varestraint testing method, for successful manufacturing gas turbine blades. It found that brittle temperature range (BTR) 400 K. This measurement obtained high-speed thermo-vision camera. BTR increased to 486 K CM247LC/ERNiFeCr-2 (dilution ratio: 74%). Theoretical calculations (i.e., Scheil equation, performed Thermo-Calc software) were conducted determine which both solid liquid phases coexist, together microstructural characterization surfaces. greater increase than attributed enlargement solid–liquid coexistence range. correlated formation low-temperature Laves phase during terminal stage solidification, affected by diluted Nb Fe components metal. Based on experimental theoretical results, proposed method dissimilar is expected be an effective process behavior high-soundness welds.

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ژورنال

عنوان ژورنال: Korean Journal of Metals and Materials

سال: 2021

ISSN: ['1738-8228', '2288-8241']

DOI: https://doi.org/10.3365/kjmm.2021.59.10.710