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

Report Date:

1978-02-01

Pagination or Media Count:

29.0

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.

Subject Categories:

  • Properties of Metals and Alloys
  • Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE