Accession Number : AD0876586

Title :   Procedures for Avoiding Heat-Treat Cracking in Nickel-Base Superalloy Weldments.

Descriptive Note : Final technical rept. 1 Aug 69-31 Jul 70,

Corporate Author : LOCKHEED-GEORGIA CO MARIETTA

Personal Author(s) : D'Annessa, Anthony T. ; Owens, John S.

Report Date : JUL 1970

Pagination or Media Count : 109

Abstract : The objective of the program was to develop procedures for minimizing (or avoiding) the problem of post-weld heat-treat cracking in nickel-base superalloy weldments using the Rene' 41 alloy as the primary study material. The selection of technical approaches took into consideration the experimental techniques and the metallurgical and processing parameters used in previous efforts. The overall experimental program was divided into three general tasks: Develop a standard crack-susceptibility test capable of discriminating and characterizing post-weld heat-treat cracking in Rene' 41; Evaluate the effects of welding-process and base-metal variables on cracking tendencies; and Determine the applicability of promising 'desensitizing' procedures developed for Rene' 41 as possible approaches to avoiding post-weld heat-treat cracking in another more crack-sensitive superalloy (Astroloy). (Author)

Descriptors :   (*SOLUTION HEAT TREATMENT, NICKEL ALLOYS), (*NICKEL ALLOYS, FRACTURE(MECHANICS)), (*WELDS, NICKEL ALLOYS), HEAT RESISTANT ALLOYS, HEAT RESISTANT METALS, CRACKS.

Subject Categories : Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE