A Metal Properties Council (MPC) task group was set up in June 1976 to find solutions to the problem of Alloy A-286 disk failures in the gas turbine industry. The task group submitted a proposal to MPC for a test program to (1) develop the necessary data to make a recommendation to ASTM for consideration of a revised acceptance test in ASTM Specification for Precipitation Hardening Iron Base Superalloys Bars, Forgings, and Forging Stock for High-Temperature Service (A 638), and (2) validate the effectiveness of improving the notch ductility of Alloy A-286 through multiple aging treatment. These creep and rupture tests of Alloy A-286 at elevated temperatures are described in this paper.
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