NACA and Office of Naval Research metallurgical investigation of two large forged discs of S-590 alloy

J. W. Freeman, Howard C. Cross
Feb 1949

The properties of large forged discs of S-590 alloy at room temperature, 1200, 1350, and 1500 degrees F were studied in order to determine the level of properties obtainable in forgings of the type required for the rotor discs of gas turbines. One disc was aged after forging. The other was solution-treated and aged. A limited amount of testing was carried out on the solution-treated disc prior to aging. The data reported include the results of tensile, impact, rupture, time-deformation, creep, and structural-stability tests.

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