Abstract: Wave rotors, used in a gas turbine topping cycle, offer a potential route to higher specific power and lower specific fuel consumption. In order to calculate this potential realistically, a ...

Abstract: Time-dependent notch sensitivity of Waspaloy was observed at test temperatures from 1000 to 1300 deg F. Its occurrence in this range was dependent on the heat treatment. “Overaging” eliminated ...

Abstract: Time-dependent notch sensitivity of Udimet 700 sheet, bar, and investment castings was observed between 1000 deg and 1400 deg F (538–760 deg C) but not at 1600 deg F (871 deg C). As was ...

Abstract: High temperature exposures were carried out to simulate long-time service. Rupture curves for exposed Grade 11 and Grade 22 steels did not exhibit the instabilities characteristic of the unused ...

Abstract: Methods for determining 100,000 hr rupture strengths for setting Code stresses were evaluated critically. Using available data for Type 304, Grade 22, and Grade 11 steels, techniques were examined ...

Abstract: The morphology of the gamma prime phase was correlated with the mechanical behavior of Waspaloy sheet at 1000–1400 deg F. “Overaging” eliminated time-dependent edge-notch sensitivity and produced ...

Abstract: Time-dependent notch sensitivity of Inconel 718 sheet was observed at 900 deg F to 1200 deg F (482–649 deg C). It occurred when edge-notched specimens were loaded below the yield strength and ...

Abstract: Tensile and creep-rupture tests were conducted for smooth and sharp edge-notched specimens of 0.015-in. (0.38 mm) thick TD-NiCr sheet at 1000 to 1800 deg F (538–982 deg C). The dislocation ...

Abstract: The finite element method is applied to the vibration analysis of axial flow turbine disks. Using the axi-symmetric properties of the configuration of such disks, several finite elements are ...