Accession Number : ADA134927

Title :   Application of Rapidly Solidified Superalloys.

Descriptive Note : Quarterly rept. 1 Nov 77-31 Jan 78,

Corporate Author : PRATT AND WHITNEY AIRCRAFT GROUP WEST PALM BEACH FL GOVERNMENT PRODUCTS DIV

Personal Author(s) : Cox,A R ; Aigeltinger,E H ; Tillman,T ; Forrester,W K

PDF Url : ADA134927

Report Date : Feb 1978

Pagination or Media Count : 29

Abstract : This program is being conducted for the purpose of applying the principle of rapid solidification to superalloy powders and subsequent development of a stronger alloy composition for jet engine turbine airfoils. Centrifugal atomization and forced convective cooling are being used to produce the fast-cooled material. During this report period, alloy iterations of the conventional and Ni-Al-Mo series were conducted; further work was conducted on phase thermal stability, grain orientation features, and forgeability. Creep-rupture testing continued with major results showing that Ta additions to Ni-Al-Mo alloys promote a stable phase dispersion up to the temperatures of gamma dissolution and early indications suggest that significant creep resistance is derived by the evolved Ni-Al-Mo-Ta microstructures.

Descriptors :   *Superalloys, *Powder metallurgy, *Solidification, *Quick reaction, Jet engines, Airfoils, Iterations, Nickel alloys, Thermal stability, Mechanical properties, Microstructure

Subject Categories : Properties of Metals and Alloys
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE