Microstructure Refinement of As-Cast Single Crystal Superalloys by Re-Solidification

S.R.  Hegde; Rick M. Kearsey; H. Saari; J. Beddoes

doi:10.4028/www.scientific.net/AMR.89-91.250

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 89-91Microstructure Refinement of As-Cast Single...

Microstructure Refinement of As-Cast Single Crystal Superalloys by Re-Solidification

Abstract:

Recently identified re-solidification behaviour of heavily alloyed single crystal super¬alloys has been incorporated into the Bridgman method. The process variables of resolidifcation temperature and mould withdrawal rate have been optimized. The microstructure, microporosity and eutectic phase fraction of re-solidified specimens were analyzed and compared with conventionally cast single crystal specimens. The potential advantage of this modified method has been illustrated by performing solution heat treatments on both re-solidified and normally cast specimens followed by eutectic phase fraction analysis.

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Periodical:

Advanced Materials Research (Volumes 89-91)

Pages:

250-255

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.89-91.250

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Online since:

January 2010

Authors:

S.R. Hegde, Rick M. Kearsey, H. Saari, J. Beddoes

Keywords:

Heat Treatment, Microsegregation, Resolidifcation, Single Crystal, Superalloy

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References

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