Procedures for Avoiding Heat-Treat Cracking in Nickel-Base Superalloy Weldments.
Final technical rept. 1 Aug 69-31 Jul 70,
LOCKHEED-GEORGIA CO MARIETTA
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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
- Fabrication Metallurgy