Application of Rapidly Solidified Superalloys.
Abstract
This program is being conducted for the purpose of applying the principle of rapid solidification to superalloy powders and subsequent development of stronger compositions for jet engine turbine airfoils. Centrifugal atomization and forced convective cooling of the material are being used for producing the fast cooled material. During this period, characteristics of powder yield resulting from high speed atomization were determined as was actual quench gas requirements on the basis of observed particle size distribution. The yield can be described as a statistically Normal distribution. The heat release profiles generated by this distribution result in an allowable reduction of about 50% in He gas requirement from original rig design criteria. Eighteen alloy lots were compacted for material equations, 14 of which were subsequently extruded. The compaction and extrusion parameters were typical of those used for conventionally processed superalloy powders. Although the results were good visually, recrystallization was not achieved in the manner expected, and it will be necessary to determine effective working procedures specifically for this material. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1976
- Accession Number
- ADA139350
Entities
People
- A. R. Cox
- R. J. Patterson
Organizations
- Pratt & Whitney