Application of Rapidly Solidified Superalloys.
Abstract
This program is being conducted for the purpose of applying the principle of fast 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 bineg used for producing the fast cooled material. During this report period, high speed operation of the atomizer was achieved with resultant high yields of superalloy powder. Metallographic evaluation continued to show cooling rates in excess of 100,000 C/sec and also showed that the existence of a 'microcrystalline' structure in the rapidly quenched powder, as opposed t the classically dendritic form. This crystallite form appears as a more homogeneous structure with almost complete, if not total, secondary phase suppression within the crystallites. Four experimental lots of material were compacted and extruded for initiation of the heat treat and mechanical test program. The working operations proceeded without difficulty. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1976
- Accession Number
- ADA139198
Entities
People
- A. R. Cox
Organizations
- Pratt & Whitney