Abstract
The advancement of jet engine technology has traditionally given wrought superalloys eminence when design calls for both reasonable high temperature strength and dynamic fracture reliability. Despite the attractiveness of cast superalloys for their improved buy-to-fly ratios and higher strengthening γ volume fractions, the expansion of polycrystalline castings into the more critical of the superalloy applications has been prevented by a lack of sufficient micro structural control in casting technology. Recently, however, advances in casting technology are making possible the production of defect tolerant superalloy castings with improved fracture reliability. This new generation of superalloy castings now offers serious competition to wrought superalloys. Never before have wrought superalloys been so seriously threatened by their cast counterparts.
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Tien, J.K., Borofka, J.C. & Casey, M.E. Precision Cast vs. Wrought Superalloys. JOM 38, 13–17 (1986). https://doi.org/10.1007/BF03257587
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DOI: https://doi.org/10.1007/BF03257587